14, HELICOPs. 279 
Helico clops, Cope, Proc, Ac. Philad. 1868, p. 309. 
P Hothown fimslentae, Cope, 1. c. p. 308. a: 
Eye small; rostral visible from above, usually in eontact with 
the internasal; frontal once and a half to once and two thirds as 
long as broad, as long as or a little longer than its distance from 
the end of the snout, as long as or a little shorter than the 
parietals ; loreal as long as deep or deeper than long; one pre- 
and two postoculars; temporals 1 or 242 or 3, posterior keeled ; 
eight upper labials, fourth entering the eye; five or six lower 
labials in contact with the anterior chin-shields, which are as long 
as the posterior: Scales in 19 rows, strongly keeled even on the 
occiput and nape; outer row more or less distinctly keeled, rarely 
smooth. Ventrals 102-130; anal divided; subcaudals 61-94, 
keeled. Olive or grey-brown above, with more or less regular 
dark brown, black-edged cross bands, which narrow towards the 
sides, where they are usually confluent with the black cross bands 
of the belly ; a large rhomboidal dark blotch on the nape; lower 
parts yellowish (in spirit) with large black spots, or, more usually, 
with regular black cross bands. 
Total length 730 millim. ; tail 200. 
Tropical South America east of the Andes. 
a. 2 (V.120; C. 61). British Guiana. 
b-e, f-g. 3 (V.116,117; Demerara. Mr. Snellgrove [C.]. 
C. 72,73) & 2 (V.120, 
120, 122,130; C. 63, 65, 
67, ?). 
h, i. $ (V.113; C.72) & Berbice. 
2 (V. 120; C. 65). 
k. 5 (V. 116; OC. 94). Para. 
rg. (V. 118; C. i Pernambuco. W. A. Forbes, Esq. [P.}. 
m,n. 2 (V.114;C.71)& Upper Amazon. 
15; C. 83). 
g. (V. 115; C. 
0. Ties. (V. 102; ©. 82). Pebas. H. W. Bates, Esq. (O 
p-t. od (V. 112; C. 73), Moyobamba, Mr. A. H. Roff [C.}. 
Q(V.114; C.62),&ye.  N.E. Peru. 
(V.110, 111, 108; ©. te 
9 (W109; 0.72 s N.E.  W. Davis, Faq. [C 
u. f ; C. 72). arayacu, N.E. - Davis, Esq. [C.}. 
=f Peru. Messrs. Veitch iP) 
v. Skull. Santa Cruz, 
Brazil. 
10. Helicops scalaris. 
Helicops scalaris, Jan, Arch. Zool. Anat. Phys. iii, 1865, p. 250, and 
Icon. Gén. 28, pl. iii. fig. 1 (1868). 
Eye small; rostral just visible from above and in contact with 
the internasal ; frontal twice as long as broad, a little longer than 
its distance from the end of the snout, a little shorter than the 
parietals ; loreal trapezoid ; one pre- and two postoculars; tem- 
porals 243; nine upper labials, fourth or fourth and fifth entering 
weer Ul 
