320 COLUBRID. 
visible from above measuring one fourth to one third its distance 
from the frontal; internasals much broader than long, one fourth 
to one third the length of the prefrontals, which are longer than 
broad; frontal as long as broad or slightly broader than long, as 
long as or a little longer than 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 (rarely two) : 
six upper labials, third and fourth entering the eye; three lower 
labials in contaet with the anterior chin-shields, which are a little 
longer than the posterior and separated from the symphysial. Scales 
in 15 rows, smooth on the anterior part of the body, finely striated 
and feebly keeled on the posterior part and on the base of the tail. 
Ventrals 124-145; anal entire; subcaudals 28-36.  Blackish 
brown above, young with a more or less distinct yellowish blotch 
across temples and occiput; ventrals and subcaudals brown edged 
with whitish, or whitish edged with brown. 
Total length 450 millim. ; tail 70. 
Costa Rica. 
a@ Hor. ¢ (V¥. 13905 C. Costa Rica. Prof. Peters [E.]. 
- 34). (One of the types.) 
b-e, f. 9 (V. 141, 141, Trazu, Costa Rica. OF Salvine & hay: 
145,158; C. 34, 34, Godman, Esqrs. [P.]. 
36, 34) & her. (V. 
135; ©. 36). 
Geen V; 145-10, 36), Cartago, Costa Rica. (Type of G. mestus.) 
8. Geophis dolichocephalus. 
Colobognathus dolichocephalus, Cope, Proc. Ac. Philad. 1871, 
p- 211*; Giinth. Zool. Rec. 1872, p. 72. 
Geophis chalybeeus, var., Giinth. Ann. § Mag. N. H. (4) ix. 1872, 
‘ aL, 
Catostoma dolichocephalum, Cope, Journ. Ae. Philad. (2) viii. 1876, 
- p. 147. ; 
Elapoides dolichocephalus, Cope, Proc. Amer, Philos. Soc, xxii. 
1885, p. 386. 
Geophis dolichocephalus, Giinth. Biol. C.-Am., Rept. p. 87 (1893). 
chalybeea, var. quadrangularis, Giinth. lc, p. 89, pl. xxxiil, 
fig. B. 
Maxillary not extending beyond palatine in front,, the first tooth 
corresponding to the suture between the second and third labial 
shields. Eye small, nearly as long as its distance from the mouth. 
Rostral moderate, as deep as broad, the portion visible from above 
measuring about one third its distance from the frontal ; internasals 
broader than long, one fourth to one third the length of the pra- 
frontals, which are longer than broad ; frontal as long as broad, as 
* It appeared to me probable that “thirteen longitudinal series of scales,” 
in the description, was a slip of the pen or a misprint for ‘ fifteen longitudinal 
series.” Having communicated with Prof. Cope on this matter, he has kindly 
examined the type specimen, and informs me that the scales are in 15 rows. 
