322 THE INDIAN JOURNAL OF VETERINARY SCIENCE AND ANIMAL HUSBANDRY [III, IV.

majority of which bear a few spines on them. The posterior extremity of the
male is truncated.

The oral sucker is subterminal or it appears to be so owing to the overhanging
dorsal rim. The diameter is about 0.15 mm. The wall of the oral sucker is thick
and it encloses a funnel shaped cavity leading into a thin walled oesophagus.

The ventral sucker is somewhat larger than the other and measures 0.18 mm.
in diameter. It is pedunculated.

The alimentary canal begins with the oesophagus which is short and it bifur-
cates in front of the ventral sucker into two intestinal caeca, and each passes on
either side of the sucker dorsally only to unite in the region about the beginning
of the middle third of the worm to form a blindly ending common caecum which
terminates 0.2 mm., from the truncated posterior extremity of the worm. The
anterior third of the common caecum appeared to possess small diverticulæ in one
worm.

The visible excretory system consists of a small elongated bladder 0.08 mm.,
in length and opens on the posterior margin of the worm. The bladder has two
cornua anteriorly, each of which disappears in the tissue on either side of the
parasite.

The genital glands consist of 4 to 7 testes which lie apparently in a row in the
median line, in the dorsal aspect, behind the ventral sucker and each gland
is almost rectangular when viewed ventrally. The vesiculæ seminis is placed in
front of the testes and opens ventrally just behind the ventral sucker.

                                  DESCRIPTION OF THE FEMALE.

The female worm is cylindrical and has nearly uniform thickness excepting at
the ends which taper slightly. The cuticle is smooth. The length varies from 4.9
to 6 mm. The oral sucker is subterminal and much more developed than the
ventral sucker. It is about 0.05 mm., in diameter and leads into the œsophagus.
The ventral sucker projects from the body and appears to be much more developed
than the corresponding sucker in other species of female Schistosomes found in
mammals. In the live worm its movements were almost similar to those of the
oral sucker. Its diameter is about 0.03 mm. The alimentary canal, as in the male,
begins with the œsophagus, bifurcates in front of the ventral sucker and the two
caeca thus formed reunite at the end of the anterior fourth of the body just behind
the ovary.

The ovary is a solid granular organ, more or less pyriform, the broader end of
which is directed anteriorly. It measures about 0.2 × 0.06 mm. The oviduct