56 Memoirs of the Indian Museum. | Vor. vale 
The prostate is large, and presents itself as a rectangular block beneath and 
rather to the outer side of the hinder half of the testis-sac; it takes up the whole 
length of the segment, and is somewhat constricted where it is attached to the parie- 
tes, —or it might be described in other words as sessile on the body-wall by a some- 
what narrowed base. It is soft in texture; no muscular lower portion or duct is 
distinguishable. 
The ovarian chamber is of a less specialized form than in a number of other 
species of the genus. On opening the specimen the appearances in this region did not 
suggest the presence of a chamber at all, and septa 10/11 and 11/12 appeared to have 
the usual disposition (1.e. that usual in other families). On closer examination, however, 
11/12 appeared to pass forwards above and close to the gut to be united with 10/11, 
thus forming the floor for an ovarian chamber, which has as its roof the dorsal body- 
wall, where the septa are not approximated at all. i believe I passed a needle for- 
wards, from segment xii underneath the chamber and dorsal to the alimentary tube, 
so that its point appeared in x, without penetrating a septum: but the whole worm 
is very small. 
The space,—segment xi, ovarian chamber,--was filled dorsally and laterally to 
the alimentary canal by a block of soft white substance, which on microscopic exam- 
ination proved to be ovary ,—not ova which had been shed. ‘The block is divided in 
the mid-dorsal line and each half is attached ventrally in the segment. The ovaries 
are thus particularly massive. 
The ovarian sacs extend backwards from septum 11/12 as far as segment xvi; they 
are of an elongated tubular shape, constricted at the septa and narrowing gradually 
towards the posterior end. 
The funnels, on the anterior face of 11/12, may be described as each consisting of a 
couple of much thickened rounded folds, parallel and almost close together, and hence 
forming the borders of a groove; at their upper end, near the mouth of the ovisac, 
these folds unite in a bluntly pointed freely projecting tip. The folds and the con- 
tained groove, passing ventralwards, reach the floor of the segment just posterior to 
the attachment of the ovary. 
The spermathecal ampulla issphericai, attached to the posterior surface of septum 
7/8 dorso-lateral to the oesophagus; the duct is thin, and is coiled in the lower part of 
segment vili. The atrium, in vii, is relatively fairly large, and is a conspicuous struc- 
ture in its segment; it is of simple shape,—a stumpy cylindrical sac-like structure 
projecting upwards. The junction of the duct was not seen,—possibly it is situated 
in the body-wall. So far as could be seen from inside, the atrium was situated in or 
about the line ab,—near the middle line immediately adjacent to the oesophagus. 
Remarks.—This would appear to be one of the more primitive species of the genus. 
As primitive characters may be mentioned the slight differentiation of the gizzard 
region of the alimentary tube and non-displacement of septa in this tract; the condi- 
tion of the ovarian chamber; the well-marked prostomium (in the species which I have 
had the opportunity of examining, both in connection with the present collection and 
previously, it is very common for the prostomium to be either small or quite invisible); 
sc ee 
