90 Records of the Indian Museum. [Voi<. IX, 



'' not develop an}- further in them than in crabs and molluscs. 

 " But if either the fish containing these cysts derived from crabs 

 '' and molluscs, or the crabs and molluscs themselves, be eaten 

 " by anElasmobranch, then, in every case, the larva would attain 

 " the adult form in the Elasmobranchs. The stage found in 

 " these fish is probably not intermediate, but casual and accidental. 

 " These fish are not to be regarded as intermediate but as 

 " accidental hosts." 



Rhynchobothrium sp. ? 



A large number of club-shaped Cestode cysts were obtained 

 from Cybium guttatum, Day, caught at Puriin January 1912. They 

 measured 11 mm. long by 3 mm. broad. The smallest measured 

 6 mm. by 2 mm. This is the same species as that obtained and 

 figured by Southwell from Ceylon waters (17) and from the same 

 species of fish. The larva was also obtained in Ceylon from 

 Chorenemus lysan, and was referred to as Rhynchohothrimn , 

 species I. The bothridia are two in number and are concave. 

 Bach bothridium appears to be divided by a faint longitudinal 

 septum into two halves. At the posterior end, each bothridium is 

 indented. The proboscides are coiled. The hooks are all similar 

 and are long and slender, and bent suddenly almost at right 

 angles at their extremity. Ninety-five specimens were collected 

 from Ceylon in February 191 1, eighty-six being from Chorenemus 

 lysan and nine from Cybium guttatum. 



Ligula simplicissima, Rudolphi. 

 (PI. vii, figs. 7—8.) 



Ligula simplicissiina, Diesing. 



,, monogramma, Creplin. 



,, digramma, Creplin. 



,, catasioma, lyinton ? 



,, intestinalis , Linnaeus. 

 Dibothrium ligula, Donnadieu. 



Our examples were taken from the coelom of Labeo calbasu 

 caught in a tank at Berhampur Court, Bengal, in September 1912. 

 Five specimens were obtained having the following measure- 

 ments : — 



Specimen. 



I. 



II. 



III. 



IV. 



The largest specimen fragmented itself during preservation, 

 but it measured over 320 mm. and its greatest breadth was 9'5 mm. 

 These measurements refer to preserved specimens. The average 



