77. XENODON. 147 
k, l-m. 9 (V. 149, 147; Panama. Christiania Museum. 
C. 46, 44) & yg. (V. 
143; C. 49). 
n. 9 (Vv. 144; C. 39). San Geronimo, Gua- O. Salvin, Esq. [C. ]. 
temala. 
o-p.-Yg. (V. 131, 132; British Honduras. Dr. Giinther [P.]. 
C. 43, 41). 
q. Yg. (V. 182; C. 42). Amula, Guerrero. F. D. Godman, Esq. [P. ]. 
2. Xenodon suspectus. 
Xenodon suspectus, Cope, Proc. Ac. Philad. 1868, p. 155. 
Maxillary teeth 14+2. Head moderately depressed. Rostral 
shield once and one third as broad as deep, the portion visible from 
above measuring one fourth its distance from the frontal ; internasals 
a little broader than long, shorter than the prefrontals ; frontal a 
little longer than broad, as long as its distance from the end of the 
snout, as long as the parietals ; “loreal deeper than long; one pre- 
and two postoculars ; temporals 1+2; eight upper labials, fourth 
and fifth entering the eye ; four lower labials in contact with the 
anterior chin-shields, which are a little larger than the posterior. 
Scales in 19 rows. Ventrals not angulate laterally, 134-141 ; 
anal entire ; subcaudals 35-40. Olive above, with broad dark 
black-edged cross bars contracted or interrupted in the middle ; 
upper surface of head with black dots ; sides of head black, with a 
few yellow dots; chin and throat black, spotted with yellow ; belly 
dark brown, with yellow spots on the sides. 
Total length 650 millim.; tail 100. 
Upper Amazon. 
a. So (V. 141; O. 40). Moyobamba, N.E. Peru. Mr. A. H. Roff [C.]. 
3. Xenodon guentheri. (Prater VII. fig. 1.) 
Maxillary teeth 13+2. Head moderately depressed. Rostral 
shield as deep as broad, the portion visible from above as long as 
half its distance from the frontal; internasals broader than long, 
shorter than the prefrontals; frontal longer than broad, as long 
as its distance from the end of the snout, as long as the parietals ; 
loreal deeper than long; one pre- and two postoculars ; temporals 
142; eight upper labials, fourth and fifth entering the eye; four 
lower leita in contact with the anterior chin-shields, which are 
larger than the posterior. Scales in 19 rows. Ventrals obtusely 
malate laterally, 170; anal divided; subcaudals 57. Above 
with dark brown, blacked- edged, sneular, transverse spots separated 
by narrow pale interspaces ; nape with an elongate rhomboidal dark 
brown spot with a central longitudinal light. streak ; head with 
three dark brown angular transverse ids. the middle one across 
the interorbital space 3 and passing through the eye ; belly yellowish 
with large black transverse spots. 
L2 
