8. LEPTOGNATHUS, 457 
shield; lower parts whitish, dotted and lineolated with dark 
brown. 
Total length 630 millim. ; tail 195. 
Brazil. 
a. & (V. 197; C. 110). Santos. Dr. J. G. Fischer. (Type.) 
14. Leptognathus viguieri. 
Leptognathus viguieri, Bocourt, Bull. Soc. Philom. (7) viii. 1884, 
. 186. 
P 
? Leptognathus brevis, Dum. § Bibr. vii. p. 476 (1854) *. 
Eye large. Nasal divided; loreal bordering the eye; no pra- 
ocular, but a small subocular below the loreal; three postoculars ; 
nine upper labials, fourth and fifth entering the eye; first lower 
labial in contact with its fellow behind the symphysial; two pairs 
of chin-shields. Scales in 15 rows, vertebrals feebly enlarged. 
Ventrals 196; anal entire; subcaudals 114. Reddish yellow 
above, with large brown spots, mostly forming complete annuli; 
head purplish black above ; temples and nape yellow. 
Total length 570 millim.; tail 170. 
Isthmus of Darien. 
15. Leptognathus annulata. 
Leptognathus annulatus, Giinth. Ann. §& Mag. N. H. (4) ix. 1872, 
p- 80, and Biol. C.-Am., Rept. p. 141, pl. xlix. fig. C (1895). 
Body very slender, strongly compressed. Eye large. Rostral 
small, nearly as deep as broad, not visible from above; internasals 
one third the length of the preefrontals ; frontal a little longer than 
broad, a little longer than its distance from the end of the snout, 
much shorter than the parietals; nasal entire; loreal once and a 
half as long as deep, bordering the eye; no preocular; prefrontal 
entering the eye; a small subocular below the loreal; two post- 
oculars ; temporals 142; seven or eight upper labials, fifth and 
sixth entering the eye; four pairs of chin-shields, the anterior very 
small and in contact with the symphysial, the second pair large 
and much longer than broad. Scales in 15 rows, vertebrals 
moderately enlarged. Ventrals 164; anal entire; subcaudals 113. 
Body with dark brown rings, separated by interspaces of pale 
brown above, of white beneath; head spotted with brown, with 
two elongate large brown spots on the parietal shields. 
Total length 440 millim.; tail 150. 
Costa Rica. 
a. Hgr. (V. 164; C. 1138). Cartago. (Type.) 
* M. Bocourt, who has kindly supplied me with additional information on 
the type of L. viguieri, informs me that the type of L. brevis had disappeared 
from the Paris Museum as early as 1862. 
