268 COLUBRID. 
shorter than the parietals ; loreal as long as deep or deeper, some- 
times entering the eye; two prioculars ; three or four postoculars ; 
temporals 2+3 or 4; seven upper labials, third and fourth entering 
the eye; four or five lower labials in contact with the anterior 
chin-shields, which are shorter than the posterior. Scales strongly 
keeled, in 23 to 27 rows. Ventrals 144-160; anal usually divided; 
subcaudals 35-50, Dull green above, uniform or with traces of black 
markings ; young with a large A- or chevron-shaped black mark 
on the nape and occiput, the point on the frontal shield, bordered 
posteriorly with bright yellow; a black band from the eye to the 
angle of the mouth, and more or less regular transverse black spots 
or bands on the body; belly blackish, or yellowish with or without 
brown spots. 
Total length 770 millim.; tail 90, 
India and Ceylon. 
a. Q (Se. 23; V. 149; Subbut Rungee, Sir E, Home [P.}. 
C. 46). Bengal. 
b-c. Q (Se. 23; V. 160, N. India. — Hearsey, Esq. 
157; C. 41, 42). bP 
d. é (Sc. 25; V. 148; Lanowli, Deccan. a Phipson, Esq. 
. 39). tse 
e. 2 (Se. 25; V. 156; Poonah. Dr. Leith [P.]. 
C. 43). 
S-g. & (Se. 27; V. 169; Matheran. Dr. Leith [P.]. 
C. 45) & yg. (Sc. 25; 
V. 154; C. 38). 
h,i-m. 3 (Se.25; V.146; Madras. Sir W. Elliot [P.}. 
C. 40), hgr. (Sc. 25; 
V. 155; C. 50), & yg. 
(Se. 23, 28, 26; V. 152, 
153, 153; C. 40, 40, 36). 
n-o. d (Sc. 25; V. 156; Anamallays. Col, Beddome [C.}. 
C. 43) & yg. (Sc. 25; 
V. 154; C. 39). 
p. é (Sc. 23; V. 156; Anamallays,4700 feet. W, Davison, Esq. 
36 - 
. 36). Pot 
g-s. 2 (Se. 27; V. 152; Coonoor, Nilgherries, we avison, Esq. 
C. 38), hgr. (Se. 25; 5900 feet. C.]. 
V. 144; C. 35), & yg. 
(Sc. 25; V. 148; C. 44). 
t. Yg. (Sc. 28; V. 151; Ceylon. 
©. 45 
. 45), 
u. Yg. (Se. 27; V. 161; Java (?). Dr. Horsfield. 
C. 42). 
12. LIOHETERODON. 
Leioheterodon, Dum. § Bibr. Erp. Gén., Atlas, pl. lxix. (1844). 
Heterodon, part., Dum. §& Bibr. (95 Gén. vii. p. 764 (1854) ; Giinth, 
Cat. Col. Sn. p. 82 (1858). ; 
Anomalodon, Jan, Arch, Zool. Anat. Phys. ii. 1863, p. 227. 
Maxillary teeth 10 to 12, followed, after an interspace, by a 
pair of strongly enlarged fangs; mandibular teeth subequal. Head 
