802 



COLUBRIDa. 



** Seven upper labials. 



Frontal a little broader than long .... 18. reticulatus, p. 311. 

 Frontal once and a half as broad as 



long 19. emmeli, p. 311. 



fl. Snout more or less pointed ; ventrals 125-150 ; sub- 

 caudals 11-19 20. trilineatus, p. 312. 



3. A single pair of very large chin-shields ; anal divided. 



21. quad7'ivi7-gatus,'p. 312. 



II. Symphysial shield in contact with the chin-shields ; tail long 

 and thick 22. favce, p. 313. 



Table showing Numbbes of Scales and Shields. 



1. Atractus elaps. 



Rhabdosoma elaps, Giinth. Cat. p. 241 (1858), and Zool. Sec. 1865, 



p. 151. 

 Rabdosoma brevifrenum, Jan, Arch. Zool. Anat. Phys. ii. 1862, 



p. 12, and Icon. Oen. 10, pi. iv. fig. 1 (1865). 

 Geophis elaps, Giinth. Ami. 8f Mag. N. H. (4) i. 1868, p. 415. 



Snout rounded. Eostral rather large, broader than deep, the 

 portion visible from above at least half as long as its distance from 

 the frontal ; internasals nearly twice as broad as long ; frontal 

 as long as broad or a little broader than long, as long as its distance 



