1921.] T. Kaburaki ; Notes on Leeches. 713 



The body is very closely similar in its external features to 

 Haemopis sangitisuga, being entirely devoid of segmental papil- 

 lae and possessing a large posterior sucker. The largest specimen 

 is 145 mm. in length, exclusive of the posterior sucker, and i8mm. 

 in width at the posterior region of the body. 



The colour in spirit is dark grey on the dorsal and lighter on 

 the ventral surface, without being marked with any trace of pat- 

 tern. 



Counted on the dorsal surface are 104 rings, of which rings 6 

 and 7 are fused on the ventral surface to form the posterior mar- 

 gin of the anterior sucker. The same is true of rings 8 and 9 on 

 the ventral surface. On some occasions ring 14 is subdivided 

 transversely into two on the ventral surface, and rings 96 and 97 

 present a tendency to fuse on the dorsal surface. Somites i. ii 

 and iii are uniannulate ; iv, v, xxvi and xxvii biannulate; vi, vii 

 and XXV triannulate; viii quadriannulate dorsal! y, but occasionally 

 with live rings ventrally owing to the subdivision of the first ring 

 (14). The sixteen somites ix-xxiv are complete with five rings. 



The eye-spots are very small and are not discernible easily 

 from the exterior, their arrangement quite agreeing with that 

 found in Haemopis sanguisiiga. 



The male genital orifice is situated near the anterior edge of 

 the last ring of somite xi, and the female orifice lies five rings be- 

 hind the male, between the fourth and fifth rings of somite xii. 



The anus is situated on the dorsal surface just behind the last 

 ring of the body. 



The clitellum extends over four somites, x-xiii. 



25. Haemopis concolor, sp. nov. 

 (Text-fig. 7.) 



The three individuals, which seem to represent a new species, 

 were collected by Dr. B. Prashad from a spring at Kasauli in the 

 Western Himalayas. 



In shape the body is much like the preceding two species and 

 is smooth on the whole, there being neither papillae nor tubercles 

 to roughen the surface. The larger specimen is 40 mm. long 

 by 6 mm. broad, while the smaller is 5 mm. long by about I'S mm. 

 across. 



The body is of a dark olive colour, without any trace of mark- 

 ings. 



In front of the posterior sucker there are 103 rings, of which 

 rings 8 and 9 are fused on the ventral side. Somites i, ii, iii and 

 xxvii are uniannulate; iv, v and xxvi biannulate; vi, vii and xxv 

 triannulate; viii quadriannulate; the sixteen somites ix-xxiv are 

 complete with five rings. In the small examples the furrows mark- 

 ing the boundaries of the somites appeared somewhat conspicuous 

 in consequence of the curvature which the body had assumed in 

 preservation. It is of some interest that the furrows separating 

 the rings in some somites are not of similar depth, differing from 



