318 COLUBKTDJ5. 



than broad, longer than its distance from the end of tho snout, 

 shorter than tho parietals ; a narrow supraocular : loroal nearly 

 twice as long as deep; one postocular; six upper labials, third and 

 fourth entering tho eye ; four lower labials in contact with the 

 anterior chin-shields, which are longer than the posterior and 

 separated from the syraphysial. Scales smooth, in 15 rows. Ycn- 

 trals 170; anal entire; subcaudals 44. Mack above, with widely 

 separated yellowish cross bars ; lower parts uniform yellowish. 



Total length 220 millim. ; tail 40. 



Tangancienaro, Mexico. 



ft. Geophis sallaei. (PLATE XVI. fig. 1.) 

 Geophis chalybaea, part., Giinth. Biol. C.-Am., Kept. p. 87 (1893). 



Maxillary extending a little beyond the palatine in front, the 

 first tooth corresponding to the suture between the second and 

 third labial shields. Eye very small, measuring two thirds to three 

 fourths its distance from the mouth. Snout rounded, feebly pro- 

 jecting. Rostral moderate, a little broader than deep, the portion 

 visible from above measuring one fourth to one third its distance 

 from the frontal ; internasals much broader than long, one fifth to 

 one fourth the length of the prsefrontals, which are longer than 

 broad ; frontal as long as broad or slightly broader than long, as 

 long as its distance from the end of the snout, shorter than the 

 parietals ; a very small supraocular ; loreal twice to twice and a 

 half as long as deep ; one postocular ; six upper labials, third and 

 fourth entering the eye ; three or four lower labials in contact with 

 the anterior chin-shields, which are as long as or a little longer than 

 the posterior and separated from the symphysial. Scales in 15 

 rows, smooth on the nape, finely striated and feebly but very 

 distinctly keeled on the body and base of tail. Ventrals 129-133 : 

 anal entire; subcaudals 30-41. Blackish brown above, scales of 

 outer row lighter in the centre ; belly uniform yellowish white ; 

 subcaudals edged with brown. 



Total length 300 millim. ; tail 55. 



Mexico. 



a, b-c. <$ (V. 129 : C. 41) Mexico. M. Sall<5 [C.]. 



& $ (V. 133, 131 ; C. 

 36, 30). 



6. Geophis chalybaeus. 



Catostoma chalybseum, Wagl, Syst. Amph. p. 194 (1830). 



Geophis chalybeus, Peters, Man. Berl. Ac. 1859, p. 275 ; Bocourt, 



Miss. Sc. Hex., Rept. p. 530, pi. xxxi. fig. 11 (1883). 

 Elapoides sieboldi, Jan, Arch. Zool. Anal,. Phys. ii. 1862, p. 21, and 



Icon. G6n. 12, pi. i. fig. 4 (1865). 



Catostoma nasale, Cope, Proc. Ac. Philad. 1808, p. 131, fig. 

 Ninia sieboldii, Garm. N. Am. Kept. p. 90 (1883). 

 Rhabdosoma nasale, Cope, Proc. Amer. Philos. Soc. xxii. 1SS.V 



p. 885. 



