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



regularly placed, ventrally than dorsally. The numbers counted were : — ix/40, xii/41, 

 xix/48, and in the middle of the body 41. 



No septa are thickened. 



The gizzard, in segment vi, is of some size, but its walls are thin and soft. 



The seminal vesicles of segment xii are larger than those of xi, and bulge back 

 the posterior septum of the segment ; they may even extend backwards so as to bulge 

 back septum 13/14. Both pairs are smooth and scarcely or not at all lobed. 



The prostates may take up fully two segments, — xviii and xix, bulging septum 

 17/18 forwards and 19/20 backwards. The border of the gland is not cut up into 

 lobes, except by an indentation on the anterior margin, and by a deep notch from 

 which the duct emerges. The duct is quite straight, soft and only slightly shiny, and 

 of equal diameter throughout ; it passes directly inwards. 



The chief difference between these specimens and those formerly described is in 

 the spermathecae ; all the specimens of the present series which were dissected pos- 

 sess a diverticulum, thus differing from the previous examples, in which I found 

 none. In these, the ampulla is a large ovoid sac ; the duct is much shorter than the 

 ampulla, from which it is distinctly marked off, narrow and of the same diameter 

 throughout. There is a single diverticulum, which varies in its appearance ; regard- 

 ing the specimens from Malabar Hill, Bombay (whence the original examples of 

 the species also came), all that can be said is that there appears to be a small scale- 

 like diverticulum from the base of the ampulla ; in that from Virar the diverticulum 

 arises from the junction of duct and ampulla, is small, rather scale-like and flattened, 

 and lies against the base of the ampulla (fig. 8a) ; in that from Talegaon it is rather 

 flat, sessile, somewhat cauliflower like, showing a number of small seminal chambers 

 (fig. 86). In the specimens from Kalyan the whole organ is of a rather different 

 appearance ; the ampulla is somewhat lobed, and has a fairly broad base, from which 

 the duct issues ; the diverticulum is larger than in the previous specimens, and is 

 divided into three lobules lying side by side ; indeed the incisions between the lobules 

 appear to be so deep that each lobule has its own attachment to the upper end of 

 the duct, i.e. there are really three diverticula (fig. 8c). Since however the whole 

 of the anatomy, including the penial setae, is the same in these latter specimens as in 

 the others, it scarcely seems allowable to separate them. The absence of any diverti- 

 culum in the original specimens is perhaps due to their relative immaturity. 



Perionyx rimatus, sp. nov. 

 Plate IX, fig. 9. 

 Jor Pokhri, 4,800 ft. : Sitong, Darjiling Dist., E. Himalayas. 22-28-X-1917. N. Annandale 

 and F. Gravely. Two specimens, one mutilated. 



External Characters : — Length 80 mm. ; diameter 4-5 mm. Colour in the anterior 

 part of the body a light rather blotchy purple on the dorsal side, pale in the posterior 

 half except for a purple middorsal stripe ; ventrally pale throughout. 



The body is rather flattened, and the clitellum is narrowed. Segments 107. 



