e06 Mr. Graif on the Genera of ReptiM^ [SEPii 



6. Pelias, Merrem, . Coluber, Laur» 



Head scaly, with three larger plates, without any fovea 

 behind the nostrils ; tail round. 



P. Berus, Merrem, Coluber Berus, Lin, 



^^ Head broad behind, with plates. Naiina. 



5. Naia, Laur. 



Head, with nine plates behind, broad ; neck very expansile, 

 covering the head like a hood ; tail round. 

 N. tripudians, Merrem, Coluber Naja, Lin, 



***Head indistinct, with plates ; mouth small, Elaphina. 



6. Sepedon, Merrem. 



Head with nine plates, without any fovea behind the nostrils ; 

 tail round. 



S. Hsemachates, Merrem. Hamachate, Lacep, 



7. El A PS, Schneid. 



Head rarely distinct from the body with plates, without any 

 fovea behind the nostrils ; tail round. 



E. Lenniscatus, Schneid. Coluber henniscatus. 



The fangs of this genus are said not to be perforated ; it is, 

 therefore, closely allied to Coluberida, and the tribe should 

 be removed to the latter family ; I have at present considered it 

 as the passage between the two sections of Ophidii. 



8. MiCRURUS, Wagler. 



Head indistinct with nine plates, without any fovea behind the 

 nostrils ; tail very short, acute ; subcaudal plates one and two 

 rowed. 



M. spixii, Wagler, 



9. Platurus, Latr, 



Head with plates ; tail compressed, broad two edged, allied to 

 Hydrid(C. 



P. fasciatus, Latr, Coluber laticaudatus, Lin. Laticauda 

 scutata, Law. Hydrus colubrinus, Schneid, 



§ 11. Upper jaw with teeth, and with or without fangs ; ovipa- 

 rous, 



Fam, II. Hydrid-i:. 



Nostrils on the top of the head, operculated ; teeth and 

 usually fangs ; body covered above with scales, and beneath with 

 scales or narrow plates. 



*Tail compressed. Living in water, 

 1. AiPYsuRus, Lflcep. 



Head shielded ; belly with a row of small shields ; tail beneath 

 scaly ; neck dilatible. 



*A. Isevis, Lacep. Enhydris laevis, Merrem. 



