152. LEPTODIRA. 93 
5. Leptodira septentrionalis. 
Dipsas septentrionalis, Kennicott, Rep. U.S. Mex. Bound. Surv. ii. 
Rept. p. 16, pl. viii. fig. 1 (1859); Cope, Proc. Ac. Philad. 1860, 
. 266 
Sibon annulatum septentrionale, Cope, Check-list N. Am. Rept. p. 38 
(1875). 
Leptodeira septentrionalis, Steyneyer, Proc. U.S, Nat. Mus, xiv. 1891, 
. 5095. 
Sibon septentrionale, part., Cope, Proc. U.S. Nat. Mus. xiv. 1892, 
p. 877. 
Leptodira annulata, part., Giinth. Biol. C.-Am., Rept. p. 170 (1895). 
Rostral twice as broad as deep, scarcely visible from above; 
internasals a little shorter than the prefrontals; frontal once and a 
half as long as broad, as long as its distance from the end of the 
snout, shorter than the parietals’; loreal as long as deep; two 
preoculars, upper in contact with the frontal, with a small subocular 
below them; two postoculars; temporals 1+2; eight upper labials, 
fourth and fifth entering the eye; tive lower labials in contact with 
the anterior chin-shields, which are as long as the posterior. Scales 
in 21 or 23 rows. Ventrals 194; anal divided; subcaudals 65-72, 
Greyish or pale brown above, with large, rhomboidal, transverse 
black spots descending to the sides; no lateral spots; head spotted 
with black, occiput whitish ; lower parts uniform whitish. 
Total length 720 millim.; tail 150. 
South-western Texas and North Mexico. 
a, & (Sc. 21; V. 194; C.72). Texas. Smithsonian Institution [P.]. 
6. Leptodira personata. 
Dipsas annulata, var. C, Dum. § Bibr. vii. p. 1141 (1854). 
Leptodeira annulata, part., Giinth. Cat. p. 166 (1858). 
Sibon annulata, part., Cope, Proc. Ac. Philad. 1860, p. 266. 
Leptodira personata, Cope, Proc. Ac. Philad. 1868, p. 310; Giinth. 
Biol. C-Am., Rept. p. 171, pl. liv. figs. A & B (1895). 
“leagaleed annulata, var. septentrionalis, Jan, Icon. Gén. 39, pl. i. 
fig. 2 (1872). 
elaiire rhombifera, Ginth. Ann. §& Mag. N. H. (4) ix. 1872, p. 32, 
and l, c. p. 173, pl. liv. fig. C. 
Sibon personatum, Cope, Bull. U.S. Nat. Mus. no. 32, 1887, p. 67, 
and Proc. US. Nat. Mus. xiv. 1892, p. 677. 
rhombiferum, Cope, li. ce. 
Leptodira splendida, Giinth. Biol. C-Am. p. 171, pl. liii. fig. B. 
Rostral broader than deep, scarcely visible from above; inter- 
nasals shorter than the prefrontals ; frontal once and a half to once 
and two thirds as long as broad, shorter than the parietals; loreal 
as long as deep or longer than deep; one or two proculars, usually 
in contact with the frontal, and usually a small subocular; two 
postoculars; temporals 142; eight upper labials, fourth and fifth 
entering. the eye; five (rarely four) lower labials in contact with 
the anterior. chin-shields, which are as long as or a little shorter 
than the posterior. Scales in 23 or 25 (rarely 21) rows. Ventrals 
