LOWER MIOCENE FORAMINIFERA OF FLORIDA. 

By JosEPH AuousTINE CusHMAN. 

The collections from which the species of 

Foraminifera described in this paper were 

obtained represent the three members of the 

lower Miocene Alum Bluff formation in Florida, 

none of which is at all rich in species. The 

Shoal River marl is the poorest of all, the 

Chipola marl has few species, and the Oak 

Grove marl a fair number. A number of the 

species are represented by single specimens 

only. 

A comparison of the faunas shows that those 

of the Oak Grove and Chipola marls are very 

similar, having ·several species in common. 

The relation of most of the species is very 

clearly Miocene, and most of them have 

already been recorded in my papers on the 

Miocene species of the Atlantic and Gulf 

Coastal Plain of the United States, the Panama 

Canal Zone, and the West Indies. The general character of the faunas confirms the placing of these deposits in the lower Miocene as 

it is now generally accepted. · 

The faunas are characterized by species 

which show the influence of fairly cool waters, 

as they include no species which are typically 

either tropical or subtropical. 

The following table shows the occurrence 

of the species obtained from the three members. The text gives something of the geographic and geologic distribution and enough 

references to permit consultation of original 

figures. The figures on the accompanying 

plate are all original and were made from 

photographs. 

Distrib·ution of lower Miocene Foraminifera of Florida. 

----------------------------------;------:-------:----

Shoal 

River 

marl. 

Oak Grove Chipola 

marl. marl. 

Virgulina floridana D'Orbigny.................................................. . . . . . . . . . . X .... · ..... . Cristellaria americana var. grandis Cushman, n. var.. ... . . . . .. . .. . . . . . . . . . . . . . . . . . . X ................... . Polym.orphina lactea (Walker and Jacob)........................................ . . . . . . . . . . X X 

Polymorphina communis D'Orbigny......................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X 

Globigerina bulloides D'Orbigny................................................. . . . . . . . . . . X ......... . Discorbis vilardeboana (D'Orbigny).............................................. . . . . . . . . . . X ......... . Discorbis bertheloti (D'Orbigny).................................................. . . . . . . . . . . X ......... . Truncatulina americana Cushman . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X ......... . Truncatulina wuellerstorfi (Schwager)............................................. . . . . . . . . . . X ......... . 

~~li!.tb~~~- ZL~~~~~)~-------~~::::.·.·-~::::::::::::::::: ::::::::::::::::::::::::::::::::: ~ .... X ... . Polystomella striato-punctata (Fichtel and Moll) ......................................... ~.. X ......... . Polystomella subnodosa (Munster)............................................... . . . . . . . . . . X ......... . Polystomella crispa (Linnaeus). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X 

Polystomella sagra D'Orbigny....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X X 

Polystomella lanieri D'Orbigny.................................................. . . . . . . . . . . X ......... . Polystomella chipolensis Cushman ............ ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X 

Amphistegina lessoni D'Orbigny................................................. . . . . . . . . . . X X 

67 
68 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1920. 

Family TEXTULABIIDAE. 

Genus VIRGULINA D'Orbigny, 1826. 

Virgulina floridana Cushman, n. sp. 

Plate XI, figure 1. 

Test elongate, tapering, the initial end smallest, thence gradually enlarging, the greatest· 

diameter being near the apertural end; chambers several, elongate, sutures distinct and 

depressed; aperture comma-shaped at the outer 

end of the ventral face of the chamber; surface smooth. Length 0.6 millimeter. 

Type specimen: U. S. National Museum, from 

U. S. G. S. station 5632, Oak Grove marl, Yellow River, Santa Rosa County, Fla. 

This seems to differ from any of the described species of Virgulina, being easily distinguished by the general form alone. 

Polymorphina lactea (Walker and Jacob) Macgillivray, A 

history of the molluscous animals of the counties 

of Aberdeen [etc.] p. 320, 1843. 

Brady, Challenger Rept., Zoology, vol. 9, p. 559, pl. 

71, fig. 11, 1884. Bagg, Maryland Geol. Survey, 

Miocene, p. 477, pl. 133, figs. 5, 6, 1904. · 

Cushman, U. S. Geol. Survey Bull. 676, p. 53, pl. 11, 

fig. 6, 1918. 

Test rotund, circuiar or elliptical in front 

view, end view broadly oval, visible chambers 

few; sutures distinct but slightly if at all excavated; wall smooth; aperture radiate, often 

slightly extended. Length 0.7o-0.75 millimeter. 

Specimens were obtained from the Chipola 

marl of Chipola, Fla., and from the Oak Grove 

marl at U.S. G. S. station 5630, Yellow River, 

Santa Rosa County, Fla. The species has 

been collected from the upper Miocene ChocFamlly LAGENIDAE. tawhatchee niarl 1 mile south of Red Bay, 

Fla.; from the Chop tank formation of Jones 

Genus CBISTELLAB.IA Lamarck, 1812. Wharf and the Calvert formation of Plum 

Cristellaria americ_ana Cushman var. grandis Cushman, . Point, Md.; from the Kirkwood formation 

n. var. near Mullica Hill, N.J. It is also known from 

Plate XI, figure 2. the Eocene of Maryland, thus giving the species 

Test differing from the typical form in the a fairly wide range in the American Tertiary 

larger number of the chambers, of which there formations. 

are nine to eleven in the last-formed coil instead of the six or seven in the typical form of 

the species. Diameter 2 millimeters, or slightly 

more .. 

Type specimen: U.S. National Museum, from 

U. S. G. S. station 5618, Shoal River marl, in 

marl pit on Langley's farm, 3! miles southwest 

of De Funiak Springs, Fla.; G. C. Matson, 

collector. 

This variety has the same closely coiled 

form, with raised costae and raised um.bonal 

portion, as the typical form, but is larger and 

has more chambers in each coil. 

The typical form was described from specimens collected in the Miocene Duplin marl of 

Muldrows Mills, S. C., and in the Miocene 

Choctawhatchee marl 1 mile south of Red Bay, 

Fla. 

Genus POLY:MOBPHINA D'Orbigny, 1826. 

Polymorphina lactea (Walker and Jacob) Macgillivray. 

Plate XI, figures 3, 4. 

Serpula lactea Walker and Jacob, in Adam's Essays on the 

microscope, 2d ed., p. 634, pl. 24, fig. 4, 1798. 

Polymorphina communis D'Orbigny. 

Plate XI, figure 5. 

Pol'!fi1W'I'Phina (Guttulina) communis D'Orbigny, Annales 

sci. nat., vol. 7, p. 266, pl. 12, figs. 1-4; Modeles, 

No. 62, 1826. 

Polymorphina communis H. B. Brady, Challenger Rept., 

Zoology, vol. 9, p. 568, pl. 72, fig. 19, 1884. 

Cushman, U. S. Nat. Mus. Bull. 71, pt. 3, p. 87, pl. 

37, fig. 7, 1913. 

Test ovate, somewhat elongate or slightly 

fusiform, initial end broadly rounded, apertural end oblique and bluntly pointed; chambers few, inflated, sutures distinct; aperture 

radiate; wall smooth. Diameter slightly more 

than 1 millimeter. 

This species occurs in the Chipola marl at 

Chipola, Fla. In some ways, eSpecially in 

the general shape, it resembles the figures 

of Polymorphina mtrea (Guttulina vitrea) of 

D'Orbigny, in the Cuban monograph, 1839, 

Plate II, figures 1-3. Bagg ·has listed P. 

communis from the Calvert formation at Plum 

Point, Md. 
LOWER MIOCENE FORAMINIFERA OF FLORIDA. 69 

Family GLOBIGERINIDAE. 

Genus GLOBIGEBINA D'Orbigny, 1826. 

Globigerina bulloides D'Orbigny. 

Plate XI, figure 6. 

Globigerina bulloides D'Orbigny, Annales sci. nat., vol. 7, 

p. 277, No.1, 1826; Modeles, Nos. 17, 76; in Barker, 

Webb, and Berthelot, Histoire naturelle des iles 

· Canaries, pt. 2, p. 132, pl. 2, figs. 1-3, 28, 1839. 

Brady, Challenger Rept., Zoology, vol. 9, p. 593, pl. 

77; pl. 79, figs. 3-7, 1884. 

Flint, U. S. Nat. Mus. Ann. Rept. for 1897, p. 321, 

pl. 69, fig. 2, 1899. 

Cushman, U.S. Nat. Mus. Bull. 71, pt. 4, p. 5, pl. 2, 

figs. 7-9; pl. 9, 1914; U. S. Geol. Survey Bull. 676, 

p. 12, pl. 3, fig. 2; p. 56, pl. 12, figs. 4, 6, 1918. 

Test subglobose, spiral, made up of a few 

inflated chambers, all visible from the dorsal 

side, three or four visible from the ventral side; 

sutures deep, surface coarsely reticulate. 

The only Florida specimens referable to this 

species are from the Oak Grove marl at U. S. 

G. S. station 5632, on Yellow River, Santa 

Rosa County, Fla. It is also recorded from the 

Pliocene and Miocene of the Coastal Plain. 

Family B.OTALUDAE. 

Genus DISCOB.BIS Lamarck, 1804. 

Discorbis vilardeboana (D'Orbigny) Cushman. 

Plate XI, figures 7, 8. 

Rosalina vilardeboana D'Orbigny, Voyage dans I' Amerique 

meridionale, Foraminiferes, p. 44, pl. 6, figs. 13-15, 

1839: 

Discorbis vilardeboana (D'Orbigny) Cushman, U. S. Nat. 

Mus. Bull. 71, pt. 5, p. 14, pl. 9, fig. 2; fig. 14 in text, 

1915; U. S. Geol. Survey Bull. 676, p. 14, pl. 3, 

fig.1;p.58,pl.14,figs.3,5;pl.15,fig.4,1918. 

Discorbina vilardeboana (D'Orbigny) Parker and Jones, 

London "Geol. Soc. Quart. Jour., vol. 28, p. 115, 

1872. 

Brady, Challenger Rept., Zoology, vol. 9, p. 645, pl. 

86, figs. 9-12; pl. 88, fig. 2, 1884. 

Test plano-convex, rounded dorsally, flattened or slightly concave ventrally, peripheral 

margin rounded; chambers about seven in the 

last-formed whorl, on the ventral border the 

last-formed chamber large, slightly inflated, 

forming one-fourth to one-third of the surface 

of the ventral side; sutures distinct, depressed, 

especially on the ventral side, somewhat 

umbilicate. Diameter 0. 7Q-0.85 millimeter. 

Specimens referred provisionally to this 

species came from the Oak Grove marl at 

U. S. G. S. station 5630, on Yellow River, 

Santa Rosa Colinty, Fla. The , species has 

been recorded from the Pliocene and Miocene 

of the Coastal Plain and from the Tertiary of 

Europe. 

From a study of the various figures of this 

species it will be seen that many forms have 

been put under this name. That is undoubtedly 

due in large part to Brady's figures in the 

OhaUenger report, which show probably three 

species, and it is to be doubted whether any of 

them is really equivalent to D'Orbigny's 

original. The original figures show a test with 

basal as~rigerine portions to the chambers 

and a rather well-developed spire to the test, 

five chambers in the last-formed whorl, not 

like any of the CJ1udlenger figures except in a 

very general way. It may be likely that the 

Tertiary species of the Coastal Plain ·of the 

United States represent other distinct species. 

Discorbis bertheloti (D'Orbigny) Cushman. 

Plate XI, figure 9. 

Rosalina bertheloti D'Orbigny, in Barker, Webb, and 

Berthelot, Histoire naturelle des iles Canaries, vol. 2, 

pt. 2, p. 135, pl. 1, figs. 28-30, 1839. 

.Discorbis bertheloti (D'Orbigny) Cushman, U. S. Nat. Mus. 

Bull. 71, pt. 5, p. 20, pl. 7, fig. 3; fig. 23 in text, 

1915; U. 8. Geol. Survey Bull. 676, p. 58, pl. 15, 

figs. 1-3, 1918. 

Discorbina bertheloti (D'Orbigny) Brady, Linnaean Soc. 

London Trans., vol. 24, p. 469, pl. 48, fig. 10, 1864; 

Challenger Rept., Zoology, vol. 9, p. 650, pl. 89, figs. 

10-12, 1884. 

Test unequally biconvex, usually six to 

seven chambers in the last-formed coil, dorsal 

side usually flattened; ventral side more convex; sutures curved, fairly distinct on both 

sides, occasionally slightly limbate; aperture 

usually extending into the dorsal side so that 

a portion of the aperture is peripheral. Diameter 0.80 millimeter or less. 

I have recorded this species from the Miocene 

of Florida, South Carolina, and Virginia. A 

rather poorly preserved speci:men figured here 

may belong to this species. It is from the Oak 

Grove marl at U. S. G. S. station 5630, on 

Yellow River, Santa Rosa County, Fla. 
70 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1920. 

Genus TBUNCATULINA D'Orbigny, 1826. 

Truncatulina americana Cushman. 

Plate XI, figures ~0, 11. 

Truncatulina americana Cushman, U. S. Geol. Survey 

Bull. 676, p. 63, pl. 20, figs. 2, 3; pl. 21, fig. 1, 1918; 

U. S. Nat. Mus. Bull. 103, p. 68, pl. 23, figs. 2a-c; 

1918. 

Test planoconvex, dorsal side nearly flat, 

ventral side slightly convex, chambers numerous, eight to ten in the last-formed coil, rather 

rapidly increasing in size, peripheral margin 

subangular, dorsal side with the last few chambers failing to meet the umbilicus, ventral 

side similar in this respect in most specimens; 

sutures distinct, slightly limbate on the dorsal 

side, depressed on the ventral side; wall 

smooth, punctate; aperture peripheral with 

a slight lip. Diameter 0.75 millimeter or less. 

This seems to be a very characteristic Miocene species, being known from the Miocene of 

North and South Carolina and Florida, as well 

as from Panama. 

The specimens from the lower Miocene were 

found in the Oak Grove marl at U. S. G. S. 

stations 5630 and 5631, on Yellow River, 

Santa Rosa County, Fla. 

Truncatulina wuellerstorfi (Schwager) H. B. Brady. 

Plate XI, figure 12. 

Anomnlina wiUlerstor.fi Schwager, Novara-Exped., Geol. 

Theil, vol. 2, p. 258, pl. 7, figs. 105, 107, 1866. 

Truncatulina wuellerstorfi (Schwager) Brady, Challenger 

Rept., Zoology, vol. 9, p. 662, pl. 93, figs. 8, 9, 1884. 

Cushman, U. S. Geol. Survey Bull. 676, p. 63, pl. 19, 

fig. 3; pl. 20, fig. 1, 1918. 

Test planoconvex, compressed, ventral sides 

slightly convex, dorsal side flattened or nearly 

so, peripheral edge usually acute, occasionally 

slightly rounded, chambers narrow, much 

curved, nine or ten in the last-formed whorl; 

sutures distinct, much curved; peripheral 

margin slightly keeled, inner margin of the 

chambers, especially on the dorsal side, slightly 

overlapping; surface coarsely punctate; aperture peripheral. Diameter 0.75 to 1 millimeter. . 

Specimens have already been recorded from 

the Miocene Choctawhatchee marl at Jackson 

Bluff, Fla., and Duplin marl at Mayesville, 

S. C. The specimen figured here was found in 

the Oak Grove marl at U. S. G. S. station 

5631, on Yellow River, Santa Rosa County, 

Fla. 

TruncatuUna sp. (?). 

Plate XI, figure 13. 

Test biconvex, peripheral margin with a 

thin, rather broad carina, chambers eight to 

ten in each coil, sutures distinct but not 

depressed, strongly curved; wall rather 

coarsely punctate. Diameter 0.65 millimeter. 

A specimen from U. S. G. S. station 5631, 

Oak Grove marl on Yellow River, Santa Rosa 

County, ·Fla., is here figured, but it is not 

assigned to any described species, as the 

specimens are too poorly preserved for recognizing it as new. 

Genus BOTALIA Lamarck, 1804. 

Rotalia beccarii (Linnaeus) D'Orbigny. 

Plate XI, figures 14-16. 

Nautilus beccarii Linnaeus, Systema naturae, 12th ed., 

p. 1162, 1767; Gmelin's 13th ed., p. 3370, No. 4, 

1788. 

Rotalia ( Turbinulina) beccarii (Linnaeus) D'Orbigny, 

Annales sci. nat., vol. 7, p. 275, No. 40, 1826; 

. Modeles, No. 7 4, 1826. 

Rotalia beccarii (Linnaeus) Parker and Jones, Philos. 

Trans., vol. 155, p. 388, pl. 16, figs. 29, 30, 1865. 

Brady, Challenger Rept., Zoology, vol. 9, p. 704, 

pl. 107' figs. 2, 3, 1884. 

Flint, U. S. Nat. Mus. Ann. Rept. for 1897, p. 331, 

pl. 75, fig. 2, 1899. 

Cushman, U. S. Geol. Survey Bull. 676, p. 18, pl. 5, 

fig. 1; pl. 6, fig. 1; p. 66, pl. 23, :fig. 3; pl. 24, :figs. 1, 

2; pl. 25, :fig. 1, 1918. 

Test biconvex; chambers numerous, the lastformed whorl containing eight to twelve; periphery rounded; sutures limbate above, much 

depressed ventrally, umbilical region often 

filled with a rounded mass of material surrounded by a depressed area running to tha 

sutures; wall smooth. 

The species ia known from the Pliocene of 

North and South Carolina and Florida and 

from the Miocene of Maryland, Virginia, North 

and South Carolina, Florida, and Alabama. In 

the lower Miocene it was collected in the Oak 

Grove marl at U. S. G. S. station 5630, on 

Yellow River, Santa Rosa County, Fla., and in 

the Chipola marl at Chipola, Fla. 
LOWER MIOCENE FORAMINIFERA OF FLORIDA. 71 

Family NUX:MULITIDAE. 

Genus POLYSTOM:ELLA Lamarck, 1822. 

PolystomeHa striatopunctata (Fichtel and MoB) Parker 

and Jones. 

Plate XI, figure 17. 

Nautilus striatopunctata Fichtel and Moll, Testacea microscopica, p. 61, pl. 9, figs. a-c, 1803. 

Polystomella striatopunctata (Fichtel and Moll) Parker and 

Jones, Annals and Mag. Nat. Hist., 3d ser., vol. 5, 

p. 103, No.6, 1860. 

Brady, Challenger Rept., Zoology, vol. 9, p. 733, pl. 

109, figs. 22, 23, 1884. 

Flint, U. S. Nat. Mus. Ann. Rept. for 1897, p. 337, 

pl. 80, fig. 2, 1899. 

Bagg, U.S. Geol. Survey Bull. 513, p. 92, pl. 27, figs. 

1o-12, 1912. 

Cwiliman, U.S. Nat. Mus. Bull. 71, pt. 4, p. 31,.pl.18, 

fig. 2, 1914; U. S. Geol. Survey Bull. 676, p. 1, 

pl. 8, fig. 4; p. 69, pl. 26, fig. 4; pl. 27, fig. 2, 1918. / 

Test nautiloid, composed of several coils, the 

last-formed one with about ten chambers, periphery broadly rounded, depressed at the umbilicus; chambers inflated, sutures depressed, 

septal lines with regular bridging; aperture a 

nearly semicircular, narrow opening. 

Forms referred to this species are common 

in the Tertiary. I have recorded it from the 

Pliocene Waccamaw marl of North and South 

Carolina and Caloosahatchee marl of Florida, 

and in the Miocene it occurs in Maryland, South 

Carolina, and Florida. It is also known from 

Panama and from the Miocene of Santo 

Domingo. The specimen figured here came 

from the Oak Grove marl at U. S. G. S. station 

5630, on Yellow River, Santa Rosa County, 

Fla. 

Polystomella subnodosa (Miinster) Reuss. 

Plate XI, figure 18. 

Robulina subnodosa Munster, Neues Jahrb., 1838, p. 391, 

pl. 3, fig. 61. 

Polystomella subnodosa Reuss, Akad. Wiss. Wien Sitzungsber., vol. 18, p. 240, pl. 4, fig. 51a, b, 1855. 

Brady, Challenger Rept., Zoology, vol. 9, p. 734, pl. 

110, fig. la, b, 1884. 

Cushman, U.S. Nat. Mus. Bull. 71, pt. 4, p. 32, pl.14, 

fig. 8, 1914; U. S. Geol. Survey Bull. 676, p. 7, 

pl. 27' fig. 6, 1918. 

Test composed of about twelve chambers in 

the last-formed volution, in face view about 

2! times as long as wide, the periphery angled 

with a blunt keel, periphery very slightly if at 

all lobulated, umbilical region umbonate, 

septal lines depressed and evenly bridged; 

aperture an arched narrow opening at the base 

of the apertural face. Diameter about 0.60 

millimeter. 

This species has been recorded from the 

Miocene Duplin marl at Mayesville, S. C. It 

also occurs in the Oak Grove marl at U.S. G. S. 

station 5630, on Yell ow River, Santa Rosa 

County, Fla. 

PolystomeHa crispa (Linnaeus) Lamarck. 

Plate XI, figure 19. 

Nautilus crispus Linnaeus, Systema naturae~ 12th ed., p. 

1162, 1767. 

Polystomella crispa Lamarck, Animaux sans vertebres, 

vol. 7, p. 625, No. 1, 1822. 

Brady, Challenger Rept., Zoology, vol. 9, p. 736, pl. 

110, figs. 6, 7, 1884. 

Cushman, U.S. Nat. Mus. Bull. 71, pt. 4, p. 32, pl. 18, 

fig. 1, 1914; U.S. Geol. Survey Bull. 676, p. 69, pl. 

27, :figs. 1, 4, 5, 1918. 

Test composed of 20 or more chambers in 

the last-formed volution, in face view about 

twice as long as wide, lenticular, widest at the 

middle, keeled with sharp-angled periphery, 

not at all lobulated; surface with the reticulated portion larger than the septal lines; 

umbilical region umbonate, filled with ·clear 

shell material, usually with a few pores; aperture an angled narrow opening, V-shaped, 

divided into several secondary openings. 

Diameter 1 millimeter or less. 

I have recorded this species from the Miocene 

Choctawhatchee marl ·of Florida, the Duplin 

marl of the Carolinas, and the Gatun formation 

of Panama. It is also known from the Miocene 

of Europe. 

The specimen described was obtained in the 

Chipola marl at Chipola, Fla. 

Polystomella sagra D'Orbigny. 

Plate XI, figures 20, 21. 

Polystomella sagra D'Orbigny, in De la Sagra, Histoire 

physique, politique et naturelle de l'rle de Cuba, 

Foraminiferes, p. 55, pl. 6, figs. 19, 20, 1839. 

Cushman, U. S. Nat. Mus. Bull. 103, p. 75, pl. 26, 

figs. 5a, b, 1918. 

Test bilaterally symmetrical, subcircular in 

side view; peripheral margin rounded, ten or 

more chambers in the last-formed coil; sutures · 

distinct, curved, slightly depressed in the lastformed portion, not at all depressed in the 

early part of the coil; early half of the coil 

with definite raised,. longitudinal ribs, corre-
72 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1920. 

sponding to the bridging over the sutures, persisting longest on the peripheral portion of 

tli.e test, later portion smooth; bridging of 

earliest portion of coil regular, short, in the 

last-formed sutures increasing considerably 

in length; apertural face smooth, punctate; 

roughly triangular in outline, the angles 

rounded; aperture a very narrow slit at the 

base of the apertural face of the chamber. 

Diameter 0.65 millimeter. 

I have already recorded this species from the 

Pleistocene of the Panama Canal Zone; from 

the Miocene marl in the gorge of Y umuri River, 

Matanzas, Cuba; and from the Miocene of 

Santo Domingo. Specimens seemingly identical occur in the lower Miocene Oak Grove 

marl at U. S. G. S. station 5630, on Yellow 

River, Santa Rosa County, Fla. The species 

also occurs in the Chipola marl at Chipola, Fla. 

Polystomella lanieri D'Orbigny. 

Plate XI, figure 22. 

Polystomella lanieri D'Orbigny, in De la Sagra, Histoire 

physique, politique et naturelle de l'ile de Cuba, 

Foraminiferes, p. 54, pl. 7, figs. 12, 13, 1839. 

This species differs from Polystomella sagra, 

described above, in the shape of the test, which 

is distinctly angled at the periphery, the sides 

in front view making a regular rhomboid form. 

The only Florida specimens referable to this 

species . are from the Oak Grove marl at U. S. 

G. S. station 5630, on Yellow River, Santa 

Rosa County, Fla. I have recorded this 

species from the Miocene marl in the gorge of 

Yumuri River, Matanzas, Cuba and from the 

Miocene of Santo Domingo. 

Polystomella chipolensis Cushman, n. sp. 

Plate XI, figure 23. 

Test rounded, composed of 10 to 12 chambers in the last-formed coil; periphery broadly 

rounded, sutures nearly obsolete, longitudinal 

markings occupying nearly the whole area 

between the sutures, in the earlier portion 

becoming fused and continuous. Diameter 

1.25 millimeters. 

Type specimen: U. S. National Museum, 

from the Chipola marl of Ohipola, ·Fla. 

This is distinguished from the other species 

of Polystomella by its very long retral processes 

and broadly rounded form. 

Genus AMPmSTEGINA D'Orbigny, 1826. 

Amphistegina lessonii D'Orblgny. 

Plate XI, figures 24-26. 

Amphistegina lessonii D'Orbigny, Annales sc1. nat., vol. 

7, p. 304, No. 3, pl. 17, figs. 1-4, 1826; Modeles, 

No. 98, 1826. 

Brady, Challenger Rept., Zoology., vol. 9, p. 740, pl. 

l11, figs. 1-7, 1884. 

Flint, U. S. Nat. Mus. Ann. Rept. for 1897, p. 338, 

pl. 82, fig. 4, 1899. 

Cushman, U. S. Nat. Mus. Bull. 71, pt. 4, p. 35, pl. 

19, fig. 2, 1914; U. S. Geol. Survey Bull. 676, p. 

20, pl. 4, fig. 3, 1918; U. S. Nat. Mus. Bull. 103, p. 

77, 1918. 

This species occurs in the Oak Grove marl 

at U. S. G. S. station 5632, on Yellow River, 

Santa Rosa County, Fla., and in the Chipola 

marl at Chipola, Fla. 
PLATE XI. 

73 
PLATE Xl. 

FIGURE 1. Virgulina.floridana Cushman, n. sp., X 40. Station 5632, Yellow River, Fla. 

2. Cristellaria americana Cushman var. grandis Cushman, X 25. Station 5618, De Fun:iak Springs, Fla. 

3. Polymarphina lactea (Walker and Jacob) Macgillivray, X 30. Chipola, Fla. 

4. Polymorphina lactea (Walker and Jacob) Macgillivray, X 30. Station 5630, Yellow River, Fla. 

5. Polymorphina communis D'Orbigny, X 30. Chipola, Fla. 

6. Globigerina bulloidis D'Orbigny, X 30. Station 5630, Yellow River, Fla. 

7. Discorbis vilardeboana (D'Orbigny) Cushman, X 30, dorsal view. Station 5630, Yellow River. Fla. 

8. Discarbis vilardeboana (D'Orbigny) Cushman, X 30, ventral view (another specimen). Station 5630, Yellow 

River, Fla. 

9. Discorbis bertheloti (?) (D'Orbigny) Cushman, X 30. Station 5630, Yellow River, Fla. 

10. Truncatulina americana Cushman, X 30. Station 5631, Yellow River, Fla. 

·11. Truncatulina americana Cushman, X 30. Station 5630, Yellow River, Fla. 

12. Truncatulina wuellerstorfi (Schwager) H. B. Brady, X 30. Station 5631, Yellow River, Fla. 

13. Truncatulina sp. (?), X 30. Station 5631, Yellow River, Fla. 

14. Rotalia beccarii (Linnaeus) D'Orbigny, X 30,.dorsal view. Station 5630, Yellow River, Fla. 

15. Rotalia beccarii (Linnaeus) D'Orbigny, X 30, ventral view. Station 5630, Yellow River, l<~la. 

16. Rotalia beccarii (Linnaeus) D'Orbigny, X 30. Chipola, Fla. 

17. Polystomella striatopunctata (Fichtel and Moll) Parker and Jones, X 30. Station 5630, Yellow River, Fla. 

18. Polystomella subnodosa (Munster) Reuss, X 30. Station 5630, Yellow River, Fla. 

19. Polystomella crispa (Linnaeus) Lamarck, X 30. Chipola, Fla. 

20. Polystomella·sagra D'Orbigny, X 30. Station 5630, Yellow River, Fla. 

21. Polystomella sagra D'Orbigny, X 30. Chipola, Fla. 

22. Polystomella lanieri D'Orbigny, X 30. Station 5630, Yellow River, Fla. 

23. Polystomella chipolensis Cushman, n. sp., X 30. Chipola, Fla. 

24. Amphistegina lessonii D'Orbigny, X 25. Chipola, Fla. 

25. Amphistegina lessonii D'Orbigny, X 25. Station 5630, Yellow River, Fla. 

26. Amphistegina lessonii D'Orbigny, X 30. Station 5632, Yellow River, Fla. 

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U. S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 128 PLATE XI 

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LOWER MIOCENE FORAMINIFERA OF' FLORIDA.