MULTICÆCUM AGILE FROM STOMACH TUMOURS OF THE INDIAN CROCODILE    251

                                    DESCRIPTION.

The body is straight and cylindrical and the males as well as the females have a
tendency to coil their posterior extremity ventrally. The entire surface is covered
with striated cuticle. The lips have one large and close to it one small papilla on
each side and in addition to these there is a small papilla in the centre of each lip
anteriorly. These papillæ on the lips appear to have escaped the notice of the
previous authors. Small interlabia are present with well-marked grooves running
along the bases of the lips. Dentigerous ridges are also present. Cervical papillæ
are very inconspicuous and are situated somewhat midway between the anterior
termination of the intestinal cæcum and excretory pore. The excretory pore is
slightly posterior to the nerve ring. The œsophagus has a small posterior ventri-
culus from which arise two anterior and three posterior appendices. The intestine
has a finger-shaped process, the intestinal cæcum, passing anteriorly.

Male. The length is 24.5—26.2* and the maximum thickness which is attained
towards the posterior extremity is 0.425— 0.53. The diameter of the head is 0.16—
0.2. The cuticular striations are 0.003—0.004 apart. The nerve ring, the excretory
pore and cervical papillae are situated at a distance of 0.6—0.71, 0.67—0.78 and
0.87—1 respectively, from the anterior end. The intestinal cæcum ends at a
distance of 1.17—1.185 from the anterior extremity. The length of the œsophageal
appendices are: anterior, 0.22—0.37; two outer posterior, 0.48—0.63; and the
middle posterior which is the smallest 0.135—0.16. The tail of the male is 0.145—
0.16 long, gradually curving ventrally and tapers conically and suddenly into a
narrow tip. The caudal alæ are absent. There are ten pairs of caudal papillæ :
five being preanal and five postanal. Of the preanal series, the first, third, and the
fourth are subventral and are fairly close together, the second is lateral. The fifth
is situated at a considerable distance from the fourth, more or less close to the
anterior extremity of the spicules. Of the postanal series the first, second, fourth
and the fifth are subventral while the third is lateral. There is a median papilla on
the anterior lip of the cloaca. Although it was not possible to examine the worms
ventrally on account of the coiled nature of the tail, the presence of the papilla was
observed in the lateral view in all the cases examined. The gubernaculam
measures 0.133—0.153 in length and is like a curved rod tapering posteriorly and
having lateral expansions beginning a short distance from its proximal end. These
expansions also diminish in width posteriorly. At its proximal end it has a solid
knob. The spicules are equal, rather sharply bent and measure 1.04—1.23 in
length. Their anterior fourth is like a rugged rod with a groove ventrally. At
their anterior fourth there are very broad chitinous expansions on either side which
diminish in width posteriorly and terminate at their posterior fourth. These

                                    * All measurements in_millimeters.