3. LEPTOGNATHTTS. 455 



deep, scarcely visible from above ; internasals not more than half 

 as long as the prsefrontals ; 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 prae- 

 ocular rarely present, the prsefrontal 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. d (V. 156; 0. 48) Rio Grand do Sul. Dr. H. v. Ihering [C.]. 



& 2 (V. 161 ; 0. 45). (Types.) 



c. d (V. 158 ; 0. 49). Rio Grande. Dr. H. v. Ihering [C.]. 



d-f. 2 (V. 158, 156, Asuncion, Paraguay. Dr. J. Bohls [0.]. 



164; C. 51,51, 50). 



11. Leptognathns insquifasciata. 



CochUophagus inaequifasciatus, Bum. ^ Bibr. vii. p. 480 (1854). 

 Legtognathus inaequifasciatus, Jan, Eknco, p. 100 (1863), and Icon, 

 Gen. 37, pi. iv. fig. 2 (1870). 



Body feebly compressed. Eye moderate. Eostral nearly as deep 

 as broad; internasals two thirds the length of the prsefrontals, 

 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 praeocular, prsefrontal entering the eye ; three or four post- 

 oculars ; temporals 1-1-3; ten upper labials, fourth and fifth 

 entering the eye; first lower labial in contact with its feUow 

 behind the symphysial ; two pairs of chin-shields, anterior a little 

 longer than broad. Scales in 15 rows, vertebrals moderately 

 enlarged. Ventrals 174; anal entire; subcaudals 61. 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. 



BrazU (?). 



