iç)-i.] Fauna of the Chilka Lake : Leeches. 673 



vided with its four pairs of lateral diverticulae, lying within three somites XX- 

 XXII. Posteriorly the stomach is continuous with the intestine which passes to the 

 anus between somites XXVI and XXVII. 



The vascular and coelomic systems, though not being traced out clearly, appear 

 to be constructed on the same plan as in other Glossosiphonids. 



The nephridia form several coils in their central portion and open out ventrally 

 on the middle ring of the somite. The total number could not be definitely made 

 out. 



The cephalic ganglionic mass occupies two somites VI and VII, and consists, as 

 usual, of the fused ganglia of the first six somites. Behind this there exist twenty- 

 two distinct ganglia in the ventral chain, the last one representing the acetabular 

 ganglionic mass. Each ganglion usually lies in the middle of the somite, though 

 it is slightly displaced towards either end of the body. 



The male genital aperture is placed between somites XI and XII. The female 

 aperture is two rings behind the male, between the first and second rings of somite 

 XII. 



The six pairs of testes lie between the lateral diverticulae of the crop, inter- 



metamerically in somites ^j — ^j^ . The vasa deferentia on each side proceed for- 

 wards, and, after, forming several coils in somites XI-XIII, unit in the median 

 plane into a thick-walled common canal, the " prostate," opening to the exterior. 



The ovaries are a pair of simple sacs extending over four somites XIII-XVI, 

 and open in common as usual. 



This leech may be placed in the genus Glossosiphonia, Johnson, with which it 

 agrees in almost all of the diagnostic characters, excepting only the difference in the 

 number of lateral diverticulae of the crop. In my opinion the difference may be 

 regarded as being of not more than specific value. 



Limnatis (Poecilobdella) granulosa (Savigny). 1 



This species, as is well known, is used for blood-letting in India and is very 

 wide in its distribution, a considerable number of examples having been recorded 

 by several authorities from Celebes, Sumatra, Borneo, Java, Cochin, Siam, China, 

 India, Ceylon and elsewhere. In addition to a single individual from this lake, 

 I have examined numerous examples from various parts of India, Ceylon and 

 Burma, which are included in the general collection. 



The body in the preserved condition is flattened and has a rough or granular 

 appearance on both sides, owing to the presence of small closely-set papillae dis- 

 posed transversely on the ring. In some cases the papillae are so small that a com- 

 paratively smooth surface is seen. This leech is of extremely varying size, the largest 



1 Blanchard, R., 1893. Revision des Hirudinées du Musée de Turin. Boll. Mus. Zool. Univ. d 

 Torino, Vol. VIII, No. 146. 1897a, Hirudinées du Musée de Leyde. Notes from the Leyden Muse- 

 um, Vol. XIX. 1897b, Hirudinées des Indes Néerlandaises. Zoologische Ergebnisse einer Reise in 

 Niederländisch Ost-lndian herausgegebenen von Dr. Max Weber. 



