55. LYTORHYNCHUS. 417 
4. Lytorhynchus decurtatus. 
Phimothyra decurtata, Cope, Proc. Ac. Philad. 1868, p. 310. 
Salvadora decurtata, Garm. N. Am. Rept. p. 39 ass), 
i gag decurtatus, Stejneger, Proc. U.S. Nat. Mus. xiii. 
890, p. 154. 
Head short and somewhat arched; rostral angularly bent, with 
straight horizontal edge, detached on the sides, the upper portion 
triangular and completely separating the internasals; frontal longer 
than broad; two or three superposed loreals ; tliree pre- and three 
postoculars; eye separated from the labials by suboculars; two 
anterior temporals ; six upper labials; a single pair of chin-shields, 
Scales smooth, in 19 rows. Ventrals 172-177; anal entire; sub- 
caudals 26-27. Light grey above; a dorsal series of about thirty 
parallelogrammic brown blotches; a lateral series of small spots ; 
labials and lower parts uniform white, 
Total length 350 millim.; tail 29. 
Lower California. 
5. Lytorhynchus brownii. 
Phyllorhynchus browni, Stejneger, Proc. U.S. Nate Mus. xiii. 1890, 
p. 152, fig. 
Snout moderately long; rostral angularly bent, with straight 
horizontal edge, detached on the sides, the upper portion triangular 
and completely separating the internasals ; frontal a little longer 
than broad, as long as the parietals ; three superposed loreals ; three 
pre-and four postoculars; eye separated from the labials by sub- 
oculars; temporals small, scale-like; six upper labials; a single 
pair of chin-shields. Scales in 19 rows, on the anterior third of 
the body nearly smooth, but becoming gradually more distinctly 
keeled posteriorly. Ventrals 159; anal entire; subcaudals 31. 
Whitish above, with about fifteen saddle-shaped brownish blotches 
on back and tail; no lateral spots; a dark transverse line on the 
head, passing through the eyes and across the interorbital region ; 
lower surface uniform white. 
_ Total length 325 millim. ; tail 42. 
Arizona, 
VoL, 1. 24 
