ON SOME LEECHES FROM THE CHILKA LAKE. 



By Tokio Kaburaki. 



In his paper dealing with the leeches from the Chilka Lake, W. A. Harding 1 puts 

 on record three species, viz. Piscicola olivacea, Glossosiphonia heteroclita and Placob- 

 delta emydae. Recently. I have had the opportunity of examining a large collection 

 of Indian leeches, in which some specimens from the same locality are included. 

 On examination some of these proved to be of great interest on account of the 

 hitherto undescribed species representing it. The following is a list of the species 

 dealt with in this paper : — 



Piscicola olivacea, Harding. 



Piscicola caeca, n. sp. 



Pterobdella amara, n. g., n. sp. 



Glossosiphonia ceylanica, Harding. 



Limnatis (Poecilobdella) granulosa (Savigny). 



Of these species Glossosiphonia ceylanica appears to be identical with the form 

 referred by Harding to the well-known leech G. heteroclita (Linn.), but it may be 

 distinguished from this by some different characters as will be mentioned later. No 

 examples of Harding's Placobdella emydae have been brought under my own observa- 

 tion. 



Before proceeding further, I should like to express my hearty thanks to Dr. Sir 

 A. K. Shipley for his suggestions in respect to the present investigation and to. Dr. N. 

 Annandale for the privilege of examining interesting material. My thanks are also 

 due to Mr. W. A. Harding for his kind help in many respects, and to Professor J. S 

 Gardiner for allowing me the use of a table at the Zoological Laboratory. 



Piscicola olivacea, Harding. 

 (Fig. i.) 

 Numerous specimens of the species apparently identical with Piscicola olivacea 

 are found included in the collection. This species generally occurs adhering to the 

 body, or to the palate within the mouth, of fishes such as Hypolophus sephen, 

 Tetradon reticularis and Dorosoma indica and appears to be fairly common in the 

 Chilka Lake, it having been secured, besides the localities recorded by Harding, from 

 several places, viz. in the neighbourhood of Mahosa, in the channel between the 

 Satpur and Barhampur Islands, at the mouth of Barkul Bay, off Parikudh, and off 

 the island in the bay beyond Grakala opposite to Kitrapal Village. 



' Harding, W. A., 1920. Hirudinea. Fauna of the Chilka Lake. Mem. Ind. Mus., Vol. V, p. 509. 



