454 ~- AMBLYCEPHALID&, 
deep, scarcely visible from above; internasals not more than half 
as long as the prefrontals; frontal as long as broad, or slightly 
broader than long, as long as or shorter than its distance from the 
end of the snout, much shorter than the parietals ; nasal entire or 
semidivided, rarely divided; loreal as long as deep or a little 
longer than deep, bordering the eye; a preocular rarely present; 
prefrontal usually entering the eye; two or three postoculars; 
temporals 1 or 242 or 3; seven or eight, rarely six, upper labials, 
third, third and fourth, fourth and fifth, or third, fourth, and fifth 
entering the eye; first lower labial in contact with its fellow behind 
the symphysial ; two to four pairs of chin-shields, anterior as long 
as broad or a little longer than broad. Scales in 15 rows, vertebrals 
feebly or moderately enlarged. Ventrals 156-180; anal entire 
(rarely divided); subcaudals 53-90. Pale brown above, with 
small darker spots and dots, and with light-edged blackish-brown 
cross-bands or alternating transverse spots; head with dark brown, 
light-edged spots; yellowish beneath, spotted or dotted with dark 
brown. 
Total length 720 millim. ; tail 170. 
Brazil, Ecuador, Colombia. 
A. Dark cross-bands wide; belly dotted with brown, or with two 
series of small brown spots. (ZL. mikani, Schleg.) 
a,b. g (V.160; C.61) Rio Grande do Sul. —— Dr. H. v. thering [C.]. 
& 2 (V.168; 0.55). 
ce. Yg. (V.167;C.70). Brazil. 
B. Cross-bands narrow ; belly as in the preceding. 
a, b-c, 43 (V. 163; C. Pernambuco. Zoological Society. 
65), hgr. (V. 172; C. 
oy © yg. (V. 177; 
te é. bin Cv. 170, 172; Bahia. Dr. O. Wucherer [C.]. 
C, 61, 63 
J. Her. (V. 156; C. 63). Rio Janeiro. A. Fry, Esq. [P.}. 
g- 2 (V. 158; ©.73). Porto Real, Prov. Rio M. Hardy du Dréneuf 
Janeiro. [C.}. 
h. Hgr. (V. 161; C. 63). Brazil. 
t. 9 skeleton. Brazil. Dr. Giinther [P.}, 
C. Ventrals with large dark brown or black spots. (ZL. oreas, Cope.) 
a-c. 9 (V. 179, 175, W. Ecuador. Mr. Fraser [C.]. 
173; C. 73, 66, 76). 
d. 9 (V. 164; C. 65). Pallatanga, Ecuador. Mr. C. Buckley [C.]. 
10, Leptognathus ventrimaculata. (Prarz XXIV. fig. 2.) 
Leptognathus ventrimaculatus, Bouleng. Ann. § Mag. N. H. (5) xvi- 
885, p. 87 ; Peracca, Boll. Mus. Torino, x. 1895, no, 195, p, 21 
Body feebly compressed. Eye moderate. Rostral broader than 
