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THE INDIAN JOURNAL OF VETERINARY SCIENCE AND ANIMAL HUSBANDRY. [V, I
testis. The dimensions of the receptaculum seminis are 0.36 × 0.275. The oviduct,
after its short course into the shell gland, enlarges into a spindle-shaped sac, the
ootype, which continues postero-laterally as the uterus. Near the posterior end.
of the ootype opens the common vitelline duct.
The vitellaria lie, for the most part, between the lateral margins of the body
and the intestinal cæca. Their anterior extension varies considerably : they may
end some distance behind the intestinal fork or they may extend as far anteriorly
as the hinder border of the pharynx. Stages intermediate between these two
extremes are seen. In the same individual the vitellaria do not necessarily termi-
nate anteriorly at the same level. Posteriorly the glands terminate on either
side of the excretory bladder. The transverse vitelline ducts pass between the
ovary and the posterior testis and unite together to form a common vitelline duct.
This latter enters the shell gland and opens into the posterior portion of the ootype.
Laurer's canal is absent. The uterine coils are very crowded in the posterior two
third of the inter-cæcal area while in the anterior third of this space they are some-
what loose. In the posterior two-thirds of their course the coils overlap the in-
testinal cæca, but in no case do they cross beyond the outer border of the cæca.
The metraterm is strongly muscular and is surrounded with gland cells. The
eggs are long and elliptical and measure 0.123—0.14 × 0.060—0.081. The eggs
in the posterior part of the uterus have a thin, yellowish shell, while the shells of those
in the anterior part are thick and brownish.
DISCUSSION.
It will be evident from the foregoing description of the worm that it is a digenetic
trematode belonging to the family Cyclocœlid Kossack, [1911]. Several genera
were included in this family, particularly as a result of the work of Witerberg [ 1926 ].
Poche [ 1925 ] states that the number of genera included in this family is nineteen.
Fuhrmann [ 1928 ], however, considers that the genera Bothriogaster Fuhrmann and
Typhlultimum Witenberg are synonyms of Spaniometra Kossack and Typhlocœlum
Stossich. Thus according to Fuhrmann the number of valid genera under the
family Cyclocœlidæ is only seventeen. Joyeux and Baer [ 1927 ] have, however,
made a critical study of the generic members belonging to Cyclocœlidæ and as a
result they reduced the entire list to three valid genera : Cyclocælum Brandes,
Spaniometra Kossack and Typhlocælum Stossich. Of these three genera the speci-
mens described above possessing ovary lateral to the testes, belong to the genus
Cyclocælum. Under this genus about fifty different species have been described
from time to time during the last century and a quarter. Joyeux and Baer [ 1927 ]
have, however, crystallised the specific number to thirteen valid species. Of these
thirteen species only six are related to the species under discussion. These related
species are C. elongatum Harrah [ 1921 ], C. mutabile Zeder [ 1800 ], C. obscurum
Leidy [ 1887 ], C. orientale Skrjabin [ 1913 ], C. toratsugumi Morishita [ 1924 ]
and C. vagum Morishita [ 1924 ]. Subsequent to the joint publication of Joyeux
and Baer in 1927 only four species of the genus Cyclocælum, related to the species