266 



COLUBRIDJE. 



II. Maxillary extending forwards beyond the palatine ; ventral 

 shields large. 



Nostrils on the upper surface of the snout ; nasal shields in contact 

 with each other ; maxillary a little longer than the ectopterygoid, 

 with 8 to 10 grooved teeth in addition to the poison-fangs. 



212. Aipysurus, p. 303. 



Nostrils lateral ; nasals separated by the internasals ; maxillary 

 much shorter than the ectopterygoid, with one or two small solid 

 teeth in addition to the poison-fangs. 213. Platurus, p. 306. 



204. HYDEUS. 



Hydrus, part., Schneid. Hist. Amph. i. p. 233 (1799). 



Pelamis, part., Baud. Hist. Rept. vii. p. 357 (1803) ; Fischer, Abh. 



Naturw. Hamh. iii. 1856, p. 61. 

 Pelamis, Fitzing. N. Class. Rept. p. 29 (1826) ; Wagl. Syst. Amph. 



p. 165 (1830) ; Gray, Cat. Sn. p. 41 (1849) ; Bum. 8r Bibr. Erp. 



Gin. vii. p. 1333 (1854) ; Giinth. Rept. Brit. Ind. p. 382 (1864). 



Yis. 19. 



Skull of Eydjrus platurus. 



Hydrophis, part., Schley. Phys. Serp. ii. p. 488 (1837) ; Jan, Elenco 



tist. Ofd. p. 109 (1863). 

 Thalassophia, part., Schmidt, Abh. Naturw. Hamh. ii. 1862, p. 76. 

 Hydrus, Boulmg. Fatm. Ind., Rept. p. 397 (1890). 



