694 Records of the Indian Museum. [Vol. XXII, 



the body, or to the palate within the mouth, of fish such as 

 Hypoloph'its sephen, Tetrodon reticidaris and Dorosoma indica. In 

 shape this leech conforms to the typical Pisctcola-outlme , with the 

 circular suckers, of which the anterior is rather less than half 

 the size of the posterior sucker. The eleven pairs of pulsating 

 vesicles are conspicuous^ especially in the living forms. Situated 

 dorsally on the anterior sucker are two pairs of eyes, as in P. 

 geometra, Linn. 



6. Piscicola caeca, Kaburaki, 1921. 



This leech inhabits the Chilka Lake and was found at- 

 tached to the jaw of HypoLophus sephen. It is closely allied to the 

 preceding species, but may be easily distinguished from it bj' the 

 absence of eyes. 



Family GLOSvSOSIPHONIDAE. 

 Genus Hemiclepsis, Vejdovsky. 

 7. Hemiclepsis marginata (O. F. IMiiller), 1774. 



Hiriido marginata (O. F. Miiller), 1774. 

 Glossosiplwnia marginata. Moquin-Tandon, 1846. 



Some examples of a species identical with Hemiclepsis margin- 

 ata were collected b}' Dr. F. H. Gravely at Bagra in Hoshangabad 

 District and also by Dr. T. Southwell from a species of Lamellidens 

 at Bhandardaha Beel in the Murshidabad District. The species is 

 one of wide distribution, being known to occur throughout the 

 greater part of Europe, China and Japan. 



The bod}' in the preserved condition is elongate-lanceolate, the 

 head being separated from the trunk by a slight neck-like narrow- 

 ing. The dorsal surface is marked with verj- weakly developed 

 papillae. Centrally attached is the posterior sucker, which is of a 

 nearly circular shape. The largest specimens are about 7 mm. 

 long by 4 mm. across at the middle of the body. 



Counted on the dorsal surface are seventi'-two rings, which 

 appear to be grouped as follows: somites i and xxvii are unian- 

 nulate ; ii, iii, iv, xxv and xxvi biannulate ; the twenty somites v- 

 xxiv are complete with three rings. 



The two pairs of eyes lie in rings 3 and 4 respectively, the first 

 pair being much smaller than the second. 



The body is of a j-ellowish colour in spirit and is marked 

 with pigment-patches which occup}- a definite position on the rings, 

 so that those on successive somites form seven longitudinal rows, 

 three in each half of the body and one median in position. The 

 paired rows may be designated as marginal, intermediate and 

 paramedian. The patches forming the median and marginal rows 

 fall on the second ring of each typical somite, while those compos- 

 ing the paramedian and intermediate rows occur on the first ring. 

 The median row is much more conspicuous than any of the others. 



