382 on the snakes of madagascar. 



1. Hydrus. 

 Schneid. Hist. Amph. i. p. 233 ; Bouleng. Oat. Sn. iii. p. 266. 



1. Hydrus platurus. 

 Anguis platura Linn. S. N. i. p. 391. 

 Hydrus plaiurits Bouleng. t. c. p. 267. 

 Jnclian and Pacific Oceans. 



2. Enhydrina. 

 Gray, Cat. Sn. p. 47 ; Bouleng. Oat. Sn. iii. p. 302. 



1. Enhydrina valakadien. 

 Hydrus valakadyn Boie, Isis,' 1827, p. 554, 

 Enhydrina valakadien Bouleng. 1. c. 

 Indian Ocean, eastwards to Papuasia. 



