374 Records of the Indian Museum. [Vol. XIII, 



funnel with iridescent spermatozoa adhering, from which the vas 

 deferens originates ; anterior to the funnel, on the inner wall of the 

 sac, the flocculent mass cannot be cleanly dislodged, — this patch 

 represents the testis, a proliferation of the sac-wall 



The vas deferens is a fine and excessively coiled tube, the 

 scores of convolutions forming a large mass which lies against the 

 testis-sac on its outer side. The first portion of the vas, which lies 

 internal to the rest, is excessively fine,— much finer than the main 

 mass ; the general direction of the tube is forwards and downwards, 

 and it terminates by joining the ental end of the prostate. 



The prostate is a white cyHndrical organ, bent in a loop on the 

 left side with its convexity backwards and the ental end upwards, 

 forming an S with the ental end of the S backwards on the right 

 side ; the ental end of the organ is sHghtly wider than the rest. 



The ovarian chamber, enclosed above by the fusion of septa 

 lo-ii and 11/12, is not opened into on opening the animal ; there 

 is apparently a free passage underneath the chamber by the side 

 of the ahmentary canal. The ovisacs arise from the posterior wall 

 of the chamber ; they are subcylindrical, with crenulated margins, 

 and lie on the intestine one on each side of the middle line 



The spermathecal ampulla, in the usual situation, is globular 

 in form ; a thin duct leads down in several loose coils on the septum, 

 and after piercing the septum joins the base of the atrium in seg- 

 ment vii. The atrium (fig. 4) is very large, and, in the dissected 

 specimen of the first batch, somewhat triangular in shape ; in the 

 natural condition the atria encircle the gut so that their straight 

 dorsal edges almost meet in the middle line. In this specimen the 

 organs are empty and laterally compressed, and a deep depression 

 exists in its dorsal border; by manipulation this pit can be seen to 

 be an invagination of the sac-wall which, when its lips are separated, 

 appears funnel-shaped ; if the pit were evaginated the atria would 

 overlap the middorsal line. The lower end of the atrium narrows 

 gradually to form a somewhat twisted duct. On opening the sac 

 the inner surface is seen to be elevated into a number of transverse 

 ridges, irregularly disposed and not distinctly annular ; but there 

 is no external annulation or grooving such as Michaelsen notes for 

 his specimens. In the specimen from Kierpur. however, trans- 

 verse ridges and folds were visible on the atrium, though not regu- 

 larly disposed; and its margins were crenulated irregularly; the 

 upper end was not invaginated. 



Remarks. — I was kindly allowed to inspect the types of the 

 species belonging to the Indian Museum ; but unfortunately they 

 arrived in such a damaged condition that I was unable to make 

 any use of them. 



I have given a complete description of the mature example 

 from Rangamati, with notes on one of those from Kierpur, since 

 they differ in details from Michaelsen's specimens. The two dis- 

 tinct parts of the vas deferens (which I think Michaelsen would have 

 mentioned), the differences in the spermathecal atria, and details 

 concerning the testis and funnel, are of minor importance; but I 



