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



Dorsal pores begin from 4/5. 



The setal rings are almost closed ventrally ; aa=i\-2ab. The dorsal break is 

 about 4yz in front of the clitellum, 32/z behind it, and 2yz in the middle of the body. 

 The setal intervals decrease somewhat outwards from the middle line, so that aa>ab> 

 bc>cd. The numbers of setae are difficult to ascertain, since the worms will bear 

 scarcely any manipulation, and doubtless many setae have dropped out ; I could only 

 count the intervals between the muscle bundles : — viii/36-44, xii/40-46, and in the 

 middle of the body 40. 



' The clitellum extends from |xiii to |xvi (=3) ; it is smooth, brownish, swollen 

 and well defined ; setae are present, but no intersegmental furrows. 



The male area (fig. 25) presents two pairs of well-marked depressions, crater-like, 

 with thickened and rounded margins, on segments xvii and xix ; these are rather 

 oval in a transverse direction. The lip is less definite on the inner side, where it 

 merges into a mid-ventral thickened area between the two depressions of a pair. The 

 depressions extend transversely between the lines of setae b and h, and with their lips 

 and the median thickened area take up the whole transverse extent of the ventral 

 surface ; longitudinally also they occupy the whole of the length of their respective 

 segments, without however encroaching on segment xviii. 



The male apertures are in the inner portions of the excavations, between the 

 lines of setae c and d. 



The female aperture is single, in a small circular whitish area just in front of the 

 setal zone of segment xiv. 



The spermathecal apertures are two pairs, on small papillae on segments viii and 

 ix ; they are in line with seta c, and about one-fifth of the circumference apart. In 

 segment ix the papillae are in the setal zone, in viii in front of it. 



The above description is that of the specimen of which a complete examination, 

 internal and external, was made. In some of the other specimens there were a few 

 variations in the external genital marks which deserve mention. 



In one, there was a cup-shaped shallow depression, also with a thickened rounded 

 margin, on the left side of segment xviii ; this was rather smaller than those on xvii 

 and xix, much shallower, and slightly internal in position to them. In another, there 

 were depressions on both sides of xviii. Or the depressions containing the male pores 

 may be smaller than above described, and circular in shape, not extending so far out- 

 wards ; or the depressions may be reduced by the filling up of their outer part, the 

 lip being much thickened here, almost like a papilla to the outer side of the pit. 



A displacement of the setal line in the spermathecal region has been noticed in 

 other species of the genus. This was not the case in the specimen first examined, 

 though setae cde appeared to be absent on both sides of segments viii and ix. In 

 another, cdef were displaced forwards on both sides in segment viii ; cd were displaced 

 backwards on the right side in ix, while on the left side the setal line was irregular. 



Internal Anatomy : — The septa were all softened ; they are apparently distinguish- 

 able as far forwards as 3/4, and 11/12 and 12/13 are perhaps somewhat thickened. 



The gizzard is of large size, regularly ovoid, firm, in segment vii. The calcifer- 



