3. LEPTOGNATHUS. 455 
deep, scarcely visible from above ; internasals not more than half 
as long as the prefrontals; frontal as long as broad, as long as or 
a little shorter than its distance from the end of the snout, much 
shorter than the parietals; nasal entire or semidivided; loreal once 
and a half to twice as long as deep, bordering the eye; a pre- 
ocular rarely present, the prefrontal usually entering the eye ; two 
postoculars ; temporals 1+-2 ; five or six upper labials, third or third 
and fourth entering the eye; first lower labial in contact with its 
fellow behind the symphysial; three or four pairs of chin-shields, 
anterior as long as broad. Scales in 15 rows, vertebrals strongly 
enlarged, the largest not twice as broad as long. Ventrals 156— 
167 ; anal entire; subcaudals 45-52. Body with large dark brown 
or blackish-brown transverse spots, or with two alternating series 
of such spots, separated by narrow pale brownish or whitish inter- 
spaces ; head with the dark spots so crowded as to appear dark 
brown or blackish, veined with brownish white; lower parts white, 
largely spotted with dark brown or black. 
Total length 525 millim. ; tail 105. 
Southern Brazil, Paraguay. 
a-b. 3 (V. 156; C.48) Rio Grand do Sul. Dr. H. v. Ihering [C.]. 
& 2(V. 161; C. 45). (Types.) 
ce. gd (V. 158; C. 49). Rio Grande. Dr. H. v. Ihering [C.]. 
df. 2 (V. 158, 156, Asuncion, Paraguay. Dr. J. Bohls [C.]. 
164; C. 51, 51, 50). 
11. Leptognathus inequifasciata. 
Cochliophagus ineequifasciatus, Dum. § Bibr. vii. p. 480 (1854). 
Legtognathus ineequifasciatus, Jan, Elenco, p. 100 (1863), and Icon, 
rén. 37, pl. iv. fig. 2 (1870). 
Body feebly compressed. Eye moderate. Rostral nearly as deep 
as broad; internasals two thirds the length of the prefrontals, 
scarcely visible from above; frontal as long as broad, as long as its 
distance from the end of the snout, shorter than the parietals ; nasal 
divided ; loreal once and a half as long as deep, bordering the eye ; 
no preocular, prefrontal entering the eye; three or four post- 
oculars; temporals 1+3; ten upper labials, fourth and fifth 
entering the eye; first lower labial in contact with its fellow 
behind the symphysial; two pairs of chin-shields, anterior a little 
longer than broad. Scales in 15 rows, vertebrals moderately 
enlarged. Ventrals 174; analentire; subcaudals6l. Pale brown 
above, with large irregular transverse dark brown spots anteriorly 
and narrow dark brown cross-bars posteriorly ; upper head-shields 
marbled with brown; a round dark spot on the occiput; whitish 
beneath, with a lateral series of small brown spots. 
Total length 445 millim.; tail 76. 
Brazil (?). 
