174 COLUBKID^. 



Acroohordus, part., Schleg. Fhys. Serp, ii. p. 424 (1837). 

 Potamophis, part., Schmidt, Abh. Natitrw. Hamb. ii. 1852, p. 75. 



Teefct subequal, 12 to 15 in each maxillary. Head not distinct 

 from neck, small, covered with granular, juxtaposed scales; nostrils 

 close together on the top of the snout ; eye very small, with ver- 

 tically subeUiptic pupil. Body stout, compressed ; scales very 

 small, juxtaposed, rhomhoidal, with a short tubercle-like keel, 

 spinose on the belly ; no ventral shields ; a fold of the skin 

 running along the median line of the abdomen. Tail short, com- 

 pressed, prehensile, scaled like the body. 



Mouths of rivers and coasts of South-eastern Asia and Papuasia. 



1. Chersydrus granulatus. 



Hydrus granulatus, Schneid. Hist. Amph. i. p. 243 (1799). 

 Acroohordus faaciatus, Shaw, Zool. iii. p. 576, pi. cxxx. (1802) ; 



Schleff. Phys. Serp. ii. p. 429, pi. xiv. flgs. 14-16 (1837). 

 Pelamis granulatus, Daud. Hept. vii. p. 370 (1803). 

 Acrochordus granulatus, Cantor, Cat. Mai. Sept. p. 69 (1847). 

 Chersydrus granulatus, Gray, Cat. p. 61 (1849) ; Oitnth. Bept. Brit. 



Ind. p. 336 (1864) ; Theob. Cat. Bept. Brit. Ind. p. 186 (1876) ; 



Boukng. Faun. Ind., Bept. p. 365, fig. (1890). 



annulatus, Gray, I. c. 



Potamophis fasciata, Schmidt, Abh. Naturw. Hamb. ii. 1862, p. 76. 

 Chersydrug fasoiatus, Dum. ^ Bibr. vii. p. 41 (1854). 



No rostral shield ; a series of slightly enlarged shields on each 

 lip, separated from the oral border by a series of minute scales ; no 

 chin-shields. About 100 scales round the body, dorsals largest. 

 Dark olive or blackish, with pale cross bands or annuli, which may 

 become indistinct in the adult. 



Total length 1000 millim. ; tail 100. 



From Southern India and Cochin China to New Guinea. 



T. 0. Jerdon, Esq."^ 



[P.l. [ (Types of C. 



J. E. Boileau, Esq. f annulatus.) 



[P.]. J ^ 



W. Theobald, Esq. [C.]. 



Dr. Cantor. 



Gen^ Hardwicke I (TypesofC. 



Leyden Museum. ( «'»«'«*««•) 

 Sir E. Belcher [P.]. 

 Dr. CoUingwood [P.]. 

 J. J. Walker, Esq. [P.]. 

 H. J. Veitch, Esq. [P.], 



Kev. S. Macfarlane [C.]. 



