I92I.] 



T. Kaburaki : Notes on Leeches. 



/'•'D 



Genus Herpobdelloidea, nov. 



i6. Herpobdelloidea lateroculata, sp. nov. 



(Text-fig. 4.) 



Some examples of this interesting species, which seems to be 

 new to science, were collected by Dr. F. H. Gravely at Burhampur 

 and also at Sangor in the Central Provinces. 



This leech presents a 

 great resemblance in its 

 form and size to the prece- 

 ding two species. The body 

 is of nearly similar breadth 

 posterior to the genital re- 

 gion, from which it tapers 

 gradually towards the ante- 

 rior end. The dorsal sur- 

 face is more or less rough 

 all over, owing to the pre- 

 sence of minute papillae 

 which present no regularity 

 in arrangement. Most of 

 the specimens are of similar 

 dimensions , measuring about 

 14 mm. long by 3 mm. 

 broad at the middle of the 

 body. 



The colour is faded in 

 spirit to a pale yellow, on 

 some occasions revealing 

 the male genital elements 

 as an irregular dark longi- 

 tudinal stripe on each side 

 of the body, extending from 

 behind the female orifice to 

 the anal region. 



Counting the first ocu- 

 liferous ring as the first ring 

 there are in all 109 rings, 

 which appear to be grouped 

 somewhat as follows, — 

 somites i, ii, iii and xxvii 

 are uniannulate ; xxv and 

 xxvi biannulate; iv trian- 

 nulate ; v and xxiv quadri- 

 annulate, of which the lat- 

 ter occasionally bears five rings owing to the subdivision of the 

 last ring. The eighteen somites vi-xxiii are complete, each being 

 formed of five rings of nearly similar width. On some occasions 



XII 



XIII 



XXI II 



XXIV 



xxy-xxvii 



TsxT-Fio. 4. — Herpobdelloidea laterocu- 

 lata, gen. et sp. nov. 



Diagram of the anterior and posterior ex- 

 iremities : dorsal view. 



