154, oxYRHOPUS. 113 
nape dark brown or blackish, with or without a yellowish band 
across the temples and occiput; lower parts uniform yellowish. 
Total length 1180 millim.; tail 240. 
Tropical South America ; Panama. 
a, Yo. (V. 190; C, 64). Cayenne. H. 0. Rothery, Esq.[P.]. 
b,c,d. 3 (V. 185; C. 81 Caracas. 
& ye. (V. 190, 184; 
™ 78). 
é. 3 (V. 189; ©. ?). Trinidad, 
FE. 2 190; C, ?). Trinidad. C. Taylor, Esq. [P.]. 
g. Her. (V. 198 ; C. 77). Bogota. C. Laverde, Esq. [P.]. 
h. 3 (V. 188; C. 96). Panama. Mr, Fraser [C.]. 
1,k. & (V. 197; C. 79) & S. America. 
2 (V. 205; ©. 75). 
17. Oxyrhopus guerini. 
Rhinosimus guerini, Dum. § Bibr. vii. p. 991, pl. Ixxii. (1854) ; 
Giinth. Cat. p. 10 (1858). 
Scytale neuwiedii, part., Dum. § Bibr. t.c. p. 1001. 
—— coronatum, part., Giinth. 1. ¢. p- 187. 
Phimophis guerini, Cope, Proc. Ac. Philad. 1860, p. 79, and 1862, 
347. 
Scytale guerini, Jan, Elenco, p. 91 (1863), and Icon, Gén. 34, pl. vi. 
fig. 2 (1870). 
coronatum, Wucherer, Proc. Zool. Soc. 1863, p. 56; Peracca, 
Boll. Mus. Torin. no. 194, 1895, p. 21. 
Rhinosimus, sp., F. Miill. Verh. Nat. Ges. Basel, vi. 1878, p. 683. 
Eye rather small; snout obtusely pointed, strongly projecting. 
Rostral large, nearly as deep as broad, its upper portion forming a 
right or acute angle and measuring at least two thirds its distance 
from the frontal; iniernasals much shorter than the preefrontals ; 
frontal a little longer than broad, usually shorter than its distance 
from the end of the snout, shorter than the parietals ; loreal much 
longer than deep; one preocular (rarely divided), not reaching. the 
upper surface of the head; two postoculars; temporals 2+3; eight 
(exceptionally seven) upper labials, fourth and fifth (or third and 
fourth) entering the eye; four lower labials in contact with the 
anterior chin-shields, which are shorter than the posterior. Scales 
in 19 rows. Ventrals 185-211; anal entire; subcaudals 70-99, 
single or only a few of the posterior in pairs. Adult dark brown 
or black above, with or without some large irregular whitish spots, 
yellowish wiite beneath ; young pale brown above, with the anterior 
half of the head and the nape blackish, the posterior ualf of the 
head yellowish white. 
Total length 1120 millim. ; 
Brazil, Paraguay. 
a. 3 (V. 200; C. 89). 
tail 250. 
Corumba, Matto Grosso, 
Bahia. 
nee Moore, Esq. 
Lord “Walsingham 
b-c. d (V. 189; C. 98) 
& 2 (V. 205; C. 88). 
VOL, III. 
I 
