CATALOGUE 



SNAKES. 



Fam. 7. COLUBRIDiE. 



Subfam. 2. COLUBBINM 

 (Continued.) 



Synopsis of the Genera. 

 (Continued from Vol. I. p. 180.) 



II. Hypapophyses absent in the posterior dorsal vertebrae, the lower 

 surface of which is smooth or with a low keel. 



A. Posterior maxillary teeth increasing in size ; anterior maxil- 



lary and mandibular teeth strongly enlarged ; pupil vertically 

 elliptic. 



Anterior maxillary teeth separated from the rest by an interspace. 



48. Lycodon, I. p. 348. 



Two or three middle maxillary teeth small, separated from the 

 anterior and posterior by distinct interspaces. 



49. Dinodon, I. p. 360. 



B. Anterior maxillary teeth not enlarged, middle and posterior 



longest ; pupil vertically elliptic. 



50. Stegonotus, I. p. 364. 



C. Anterior and middle maxillary teeth not enlarged, posterior 



increasing in size or the last strongly enlarged. 



1. Palatine and pterygoid bones toothed ; pupil vertically 

 elliptic. 



Maxillary teeth 8 to 10 ; scales with apical pits. 



51. Dryocalamus, I. p. 369. 



