414 COLUBRID. 
Snout obtuse, feebly projecting. Rostral broader than deep, just 
visible from above; upper surface of snout with numerous small 
shields ; frontal broken up into three shields ; loreal and temporal 
regions covered with numerous small scales; upper labials 14 or 15, 
separated from the eye by a series of suboculars; six lower labials 
in contact with the anterior chin-shields; posterior chin-shields 
narrow and separated from each other by two series of scales. 
Scales smooth, in 41 or 43 rows. Ventrals 263; anal entire; sub- 
caudals 100. Pale buff above, with blackish spots which are rect- 
angular and transverse on the anterior part of the body; a blackish 
streak along each side of the neck and another from the nostril to 
the angle of the mouth, passing through the eye; yellowish white 
inferiorly. ; 
Total length 1230 millim. ; tail 240. 
Persia (Laristan and Shiraz). 
55. LYTORHYNCHUS. 
Heterodon, part., Dum. § Bibr. Erp. Gén. vii. g 764 (1854), 
Simotes, part., Giinth. Cat. Col. Sn. p. 23 (1858) . 
Lytorhynchus, Peters, Mon. Berl. Ac. 1862, p. 272; Bouleng. Ann. 
& Mag. N. H. (5) xx. 1887, p. 414, and Faun. Ind., Rept. p. 322 
(1890). 
Chatachlein, Jan, Arch. Zool. Anat. Phys. ii. 1863, p. 228. 
Acontiophis, Giinth. Proc. Zool. Soe, 1875, p. 252. 
Catachlena, Blanf, Proc. Zool, Soc. 1881, p. 678. 
Phyllorhynchus, Stejneger, Proce. U.S. Nat. Mus, xiii. 1890, p. 151; 
Cope, Proc. U.S. Nat. Mus. xiv. 1892, p. 617. 
Maxillary teeth 6 to 9, posterior much longer than anterior ; 
mandibular teeth subequal. Head slightly distinct from neck, with 
cuneiform projecting snout ; eye moderate, pupil vertically elliptic ; 
rostral large, four-sided, projecting, concave inferiorly ; nostril an 
oblique slit between twonasals. Body elongate, cylindrical; scales 
smooth or feebly keeled, without apical pits, in 19 rows; ventrals 
obtusely angulate laterally. Tail moderate or short ; subcaudals in 
two rows. 
North Africa and Asia, from the Algerian Sahara to Syria, 
Transcaspia, Afghanistan, and Sind ; Arizona and Lower California, 
Synopsis of the Species. 
I. Internasals forming a suture behind the rostral; two pairs of 
chin-shields, 
End of snout truncate; a pair of pre- 
frontals ; two labials entering the eye .. 1. diadema, p. 415, 
Snout pointed; a single prefrontal; no 
labial entering the eye ..........+... 2. ridgewayi, p. 415, 
Snout pointed; a pair of prefrontals ; one 
labial entering the eye .............. 3. paradoxus, p. 416. 
a ee? eo = — oT 
