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



The duct is much twisted and relatively thin, not firm and shining ; its ectal end is 

 rather stouter than the rest. 



There are two pairs of spermathecae (fig. 9). The organs occupy the whole 

 available space in segments vii and viii, and meet dorsally. The ampulla is a large 

 irregular sac, with bulgings here and there; the duct is moderately stout, half as 

 long as the ampulla, not firm or shining. The diverticula are in the form of a few small 

 warts on the duct a short way below the base of the ampulla ; these form a cluster, 

 about half a dozen in all, of which one appears to be larger than the rest ; the smaller 

 hardly project at all, but the iridescent spermatozoa shine through. 



There are no penial setae. 



Remarks : — I was at first inclined to identify this form as Perionyx himalayanus 

 (Michaelsen, 3), on the ground of its possessing testis sacs, — a rather unusual feature 

 in this genus. There is also the fact that the present specimens come from the same 

 district (Darjiling Dist.) as P. himalayanus, and that both are much paler in colour 

 than is general . in this genus. But, neglecting slighter differences such as the distri- 

 bution of the thickened septa, the character of the prostatic duct, the numbers of 

 the setae, and the extent of the dorsal pores, there remain essential differences in 

 the extent of the clitellum, the spermathecal diverticula, and especially the configu- 

 ration of the male area. In P. himalayanus the male pores are situated on large 

 round papillae which are quite at the sides of the ventral aspect, one-fifth of the 

 circumference apart from each other ; and a number of setae intervene between the 

 two papillae. Here the pores are situated near each other in the depth of a trans- 

 verse crack. 



Though both species possess testis sacs, it is possible that their relations to the 

 seminal vesicles are not the same. In P. himalayanus the sperm sacs are apparently 

 prolonged laterally to form seminal vesicles in segments x and xi ; here there is no 

 such prolongation in segment x, seminal vesicles being absent in this segment ; and 

 the seminal vesicles of xi are independent of the testis sacs, and have their own at- 

 tachment to the anterior septum of the segment. 



Perionyx pokhrianus, sp. no v. 

 Plate IX, figs. 10, 11. 



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

 and F. Gravely. A single specimen (along with the last). 



External Characters : — Length 65 mm. ; diameter 3 mm. Colour pale violet 

 dorsally, — posteriorly paler than in front ; a mid-dorsal darker stripe ; ventral surface 

 unpigmented. Segments 96. 



Prostomium epilobous \, the tongue (posterior portion projecting into segment i) 

 not cut off by a groove behind. 



Dorsal pores begin from groove 4/5. 



The setae are in rings, which are almost closed both dorsally and ventrally, and 

 may be quite closed in the hinder part of the body; aa or zz = ij or i| times ab or 



