77 



in pairs, forming a narrow six-sided shield. Living in the sea or salt-water 

 lakes, or in fresh water. 



Genus HYDRUS. 



512. The Ringed Sea Snake (Hydrus annulatus, Gray ; Bangarus annu- 



lar is, Shaw). 



Fig. Cat. of Serp. in Brit. Mus. p. 59. 

 Hob. Indian Ocean. 



Genus PELAMIS, Gray. 



513. The Black-backed Pelamis (Pelamis bicolor, Baud.; Hydrus bicolor, 



Shaw ; Anguis platura, Linn.). 

 Fig. Daud. Kept. vi. p. 366. Shaw, Zool. vol. iii. p. 566. Cat. of Snakes 



in Brit. Mus. p. 41. 

 Hub. Indian Seas. 



514. Pelamis bicolor, Daud. ; Hydrus bicolor, Shaw. 



Hob. Indian Seas. 



515. Pelamis bicolor, Daud. ; Hydrus bicolor, Shaw. 



Hob. Indian Seas. 



516. Hydrus Shiddul. 



Fig. Russell's Ind. Serp. vol. ii. p. 14. pi. 12. 

 Hob. Tranquebar. 



This and the preceding specimen formed part of the collection of the late 

 Dr. Patrick Russell, and were presented to the Museum of the College in 

 1819. 



Genus HYDROPHIS, Daud. 



517. Hydrophis Manilla, Owen (nov. spec.). 



Hob. Manilla. Presented by George Bennett, Esq., M.R.C.S.E. 



518. The Black-headed Kerril (Hydrophis doliata, Gray ; Enhydris do- 



liata, Merrem). 



Fig. Gray, Zool. Misc. 6. Merrem. Tent. 140. 

 Hab. Coast of Australia. 



