82 Records of the Indian Museum. [Vol. XV, 



at\d we are hoping, at no distant date, to be able to determine, in 

 detail, the exact relationships of the various genera included in this 

 family. 



The anatomy of the reproductive organs in our species is quite unlike 

 that given by Linton (2) for the various species of Rhynchobothridae 

 recorded by him. On the otlier hand, it resembles very closely the figure 

 of an immature proglottid of Tetrarlujnchus erinaceus, Ben., figured by 

 Johnstone (1). It differs only in the absence of vitellaria and a few 

 minor details. 



Literature cited — 



(1) Johnstone, J. — Tetrarhynchus erinaceus, Van Beneden. 



Parasitology, Vol. IV, No. 4, Cambridge, 

 1912. 



(2) Linton, E. — Notes on Entozoa of marine fishes of New 



England, with descriptions of several new 

 species. United States Fish Commissioners^ 

 Report, 1887. 



(3) Regan, C. T. — A revision of the Clupeoid Fishes of the 



genera Pomolobus, Brevoortia, and Doro- 

 soma and their allies. Ann. Mar/. Nat. 

 Hist., Vol. XIX, No. 112, April, 1917. 



(4) Shipley and Hornell. — Cestode and Nematode parasites from 



the marine fishes of Ceylon. Ceylon Pearl 

 Oyster Report, Vol. V, Royal Society, 

 London, 1906. 



(5) Southwell, T. — On some Indian Cestoda. Part I. Rec. 



Ind. Mus., Vol. IX, Part V, December, 

 1913. 



(6) Southwell, T. — Notes from the Bengal Fisheries Laboratory. 



Parasites from Fish. Rec. Ind. Mus., Vol. 

 IX, Part V, 1913. 



II. A NOTE ON THE CYSTS OF SYNDESMOBOTHRIUM FILI- 

 COLLE, LINTON, PARASITIC IN THE LATERAL MUSCLES 

 OF HILSA. 



Specimens of Hilsa purchased from the Calcutta market during 

 October, 1917 were found, on careful examination, to contain cysts of 

 Syndesmohothrium fMcolle, Linton, in their flesh (lateral muscles). 



Southwell (3) recorded specimens of this cyst from the mesenteries 

 of Hilsa in 1913. This parasite is, of course, distinct from the cysts of 

 Rhynchobothrius ilisha, Southwell and Prashad, described in the first 

 part of this paper. 



The cysts, when removed from the muscles, showed a considerable 

 amount of movement and remained alive in normal salt solution for a 

 few hours. Both the head and tail of the tadpole-shaped cysts (plate iv, 

 fig. 8) were mobile. The head, in addition, showed contractile 

 movements, owing to which its shape exhibited great variation in form. 



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