1913-] T. Southwell : Indian Cestoda. 295 



Literature : — 



Southwell, igi2. 



The above species appear to differ from those described by 

 Shipley and Hornell (1906) from the same region, and from the 

 same species of fish. 



(II) Genus Tctrarhynchus, Rudolphi, 1809. 



=:Tetrarliyncliobothi'{uin, Diesing, 1850. 



General characters; — Body articulate, taeniaeform. Neck 

 tubular. Head with four bothridia in two lateral pairs, parallel 

 with the head. Proboscides four, terminal, filiform, armed, retrac- 

 tile in the neck, free, i.e. not running through the bothria. Genital 

 apertures marginal or lateral. 



(i) Tetrarhynchus gangcticus, Shipley and Hornell, 1906. 

 Larvae. About 100 specimens. 



ZEV^-»/Q Sphyraenajello. Pearl Banks, Ceylon. T.Southwell. 



Literature : — 



Shipley and Hornell, 1906. Southwell, igi2. 



(2) Larva of Tetrarhynchus platycephalus, Shipley and 



Hornell, 1906. 

 Few specimens : — 



Z E V -^-^^-i. Trygon walga. Pearl Banks, Ceylon. T. Southwell. 



Literature : — 



Shipley and Hornell, igo6. 



(3) Tetrarhynchus sp. 



Larvae. Numerous specimens ; — 



Z E V ^^^^. Balisfes sp. Pearl Banks, Ceylon. T. Southwell. 



(4) Tetrarhynchus sp. 

 Larvae. Many specimens : — 



Z E V -''-^^^. Ltitianus sp. Pearl Banks, Ceylon. T. Southwell. 



(5) Tetrarhynchus sp. 

 Larvae. Many specimens : — 



Z E V -^"y^-i. Se'i'vaniis iDuhilosits. Pearl Banks, Ceylon. T.Southwell. 



(Ill) Genus Otobothrium, Linton, 1891. 



General characters: — Body articulate, taeniaeform, head 

 separated from body by a neck. Bothridia two, opposite, lateral, 



