214 Memoirs of the Indian Museum. [Vol. VII, 



taking up the length of the segment. The pores are fairly conspicuous, rather close 

 together, about in line with the setal interval cd. 



The female pore is apparently situated in a small whitish area anteriorly on seg- 

 ment xiv. 



The spermathecal apertures are situated in grooves 7/8 and 8/9, about the same 

 distance apart as the male pores or slightly closer, in line with the interval be. 



Internal Anatomy : — The septa of the anterior part of the body as far back as the 

 prostatic region are slightly thickened, with the exception of the first, 4/5, which is 

 very thin ; perhaps 6/7-9/10 are most thickened. 



The gizzard, in segment vi, is of fair size ; the walls are somewhat, but not very, 

 soft, and it must be reckoned as well developed for a species of this genus. 



The intestine begins in segment xvi ; no calciferous glands were seen. 



The last heart is in segment xii. 



The ducts of the nephridia end in approximately the same line. 



Testes and large funnels are free in segments x and xi. 



The seminal vesicles are in xi and xii ; they are large, and bulge out the segments 

 in which they are contained, those in xii pressing back septum 12/13 to the level 

 of 13/14. They are smooth and not cut up into lobes. Those in xii meet dorsally 

 but do not fuse ; those in xi actually fuse in the posterior part of the segment. 



The prostates are of moderate size, and are confined to segment xviii, though 

 bulging the septa forwards and backwards to some extent. The surface is indented 

 so as to form a number of lobes. The duct comes off from a hilus on the inner side, 

 is short and straight, and though moderately stout is soft and without muscular glitter. 



The ovaries and funnels are in segment xiii. Tiny white subspherical appendages 

 by the side of the alimentary canal on the anterior wall of segment xiv appear to be 

 ovisacs. 



The spermathecae, in segments viii and ix, are large, and fill out their respective 

 segments. The ampulla is an ovoid sac. The duct is half as long and almost half as 

 thick as the ampulla, — that is, relatively very stout. The diverticula are present as 

 two clusters of seminal chambers on the duct just below the base of the ampulla ; 

 each cluster is cauliflower-like, and sessile by a "broad base; the clusters leave the 

 postero-internal and anterior or antero-internal aspects of the duct free (fig. 17). 



The penial setae are "87 mm. long, and 20/* thick. The shaft is straight, the tip 

 slightly bowed and bluntly pointed. The ornamentation consists of about eight rings 

 of rather fine spines ; there may be a very fine ninth or even tenth ring. 



Perionyx fossus, sp. nov. 

 Plate IX, fig. 18, 19. 

 Shillong, Assam , 4,500-5,000 ft. 16-20-iv-1918. N. Annandale. A single specimen. 

 External Characters : — Length 86 mm. ; diameter 3-5 mm. Colour a dusky pur- 

 ple dorsally, pale and unpigmented ventrally, the upper tint shading off rather gradu- 

 ally into the lower. Segments 136. The body here again is circular in transverse 

 section. 



