New-York tribune., 1873-03-22

not carry the comparison over into tho type Of artIcu
lates OF into any other pe ot he ANNA, ns So S
velopnent has character distinct as the plan on
which the type is bn An insect Tor instance can car
never at any time OF s deveOpmen after II mas paseu
out OF that universal condition of the ovarian egg ~
which audcd. be compared to an oyster OF Is Vne e
n masses through phases where u can hafuly po
distinguished from worm; that is, IN the @ Soulso
of its development IL bears transient Ikvnf f the
type OF artIcuates TO which they both belong IN s
every animal belonging TO any one OF ie M caches Inc
adult state may pass through inOdlneu n,vv tyne
each of which he resembles some oeg n, m Condition is
of the animal kin ngdom for whom thaI ,'s ~ ami
final Enough il known of tho
h s ns| Uc NO niibongh t6e nuIaDer OF illustrations IS
small The study Of enbryology s eAooou IN order to
mud the sacrifice of specimens is very great IN OIu @ S W
haip tne conpete history of the growth OF any one
animal The progress Of these lnNeslgattioi' ID so
uecessary bo SLOW because they are so aDorIous anu 1
ostIy hnI they have already assumed sequence anu
coherence enough afford sound basis loI ,no @ ese
hance have been followed, the limitations keeping eaen
primary type within its own D9nhoa"s 9d nerov Wholly
st ;bt of This carelessness of investigation or OF
statement gives currency TO broad ~ cdver
TALLY true indeed, Dut ldl'o "noA ''' ~ ~
too wide ground.
MANS RELATIONS ONLY WITH THE NLRIEBRArEs
". have 70 consider in these lectures what the facts
are and where they lead. shall give In my next iec
~ the structure and condition Of the egg, egg with
rapid survey Of the changes 1t undergoes' Iheh VIII
come those phases by which each animal takes on It's
character as belonging another group OF the
ANIMAL Kingdom Though have said that all animals
start from eggs identical In structure. you all KNOW
tbat the young oyster is not the the young
chicken. Every great typical division OF tne amman
Kingdom is built given plan; In Other WORDS tues9
manifold structures represent ideas, anu Win tnese
wish 10 make YOU acquainted. There Is difference IN
the original conception and that difference Is carried
ont i'm material structures Man said to be the crown
ing point ascending scale. Unquesuonabiy ne Is
the highest created being, but he Is the eliminating
pOnt especially of his series, OF that vertebrate
series 10 which ne belongs No inyertebraie animal hs
any structural relation to man whatever, Whle every
member of bis own type has intimate structural Iei-
tiOn with him. -, 80.
III animals are not based plan, neither are they
all found spot nor have they ever been clrcu-
scrbed TO one center. Animals distributed over the
whole surface Of the globe the land ana III me Wef
aud however widely separated by space, We ma then
united by the laws OF typical resemDlancts anu
differences. Neither do they belong 10 any time Whlcn
/ we can reckon They have history II not as Ola as
earth herself running back faF behind Ou present
nOwledge-beyOnd the reach or the nauralts eye OF
mind But this much We knows when lie nrst became
possible earth il found expression in forms dineflng
from those now existing These first populations were
followed by others distinct from tneIni ana lnese
successive populations were changed again ana hEdlu
leading at last TO the animal kingdom as we KNOW IL now
with man at head What connection Is there between
an these successive pOpuatiousl Are the quadrupeds
the descendants of any earlier NercOrates ana we our
selves the descendants of the first born mhminalla
How did the earth TO be inhabited as is now Is
broad look, without resting upon the details Pefhaps
however there may be an advantage IN THIS. we some
times the connection OF the whole better Tor nOt
dwelling long upon the parts For TINS reason,
/ have chosen very comprehensive scheme ler my
course. shall endeaVOr 10 snow You especially tnc
connection whole; TO show you how intimately
| the different parts Of the organic system when We cal
the animal kin gdOm are related; 10 snow you ihat mar
together with the whole history and distribution OF life
/ upon our sODc.