414 



AHBLYCEPHA.LIDJE. 



Family VIII. AMBLYCEPHALID^. 



Facial bones movable ; transpalatine present ; pterygoicl short, 

 not extending to quadrate or mandible ; supratemporal present, 

 suuill ; maxillary horizontal, converging posteriorly towards pala- 

 tines. Mandible without coronoid bone. Both jaws toothed ; 

 teeth all solid. 



Externally, these snakes are distinguished from the Dipsadine 

 Colubridcv, to which they bear some resemblance, by the absence of 

 a mental groove. The mouth is susceptible of but slight expansion, 

 the snakes of this group feeding upon small prey. The large size 

 of the eye and the vertical pupil indicate nocturnal habits. 



The Aniblyceplialidce are represented in the East Indies (Ambly- 

 cepJialus, Haplopeltura) and in Tropical America (Dipsadomorus, 

 Leptoynathus). 



Genus ATOLYCEPHALTJS, 



Kuhl, in F&ussac, Bull. Sc. Nat. ii, 1824, p. 81 ; Boie. Isis, 1827, 

 p. 519*. 



Maxillary teeth few, small, without grooved fangs ; anterior 

 mandibular teeth longest. Head distinct from neck, with short, 



Fig. 120. Head of Amblycephalus monticola. 

 * Type : A. Icevis. 



