18 COLUBRID. 
a, 8B. d (Se. 23; V. 154; Labuan. L, L. Dillwyn, Esq. 
C. 65) & yg. (Se. 23; [P.}. 
V. 155; C. 66). 
y: ay ae 23; V. 153; Palawan. A. Everett, Esq. [C.], 
d-e: ¢ (Se. 23; V. 160; Placer, Mindanao. A, Everett, Esq. (C.} 
C. 69) & Q (Se. 25; 
V. 158; C.?). 
¢. 2 ey 25; V. 151; Negros. Dr. A. B, Meyer [C.], 
n. ¢ (Sc. 23; V. 157; _ Philippines. H. Cuming, Esq. [C.]. 
59 Oh pies ; (Type of Gaia) 
6,1. Q2(Sc. 25,28; V.151, ‘Philippines. Messrs. Veitch [P.}. 
150; O. 55, 52). 
kK. é es 23; V. 158; Java. G. Lyon, Esq. [P.). 
. 66). 
X. ¢ (Sc. 23; V. 151; Batavia. 
C. 64). 
p. 2 (Sc. 25; V. 150; Manado, Celebes. Dr. A. B. Meyer [C.}. 
v-&. 9 (Sc. 23; V. 146, N. Ceram. 
o-p. ¢ (Sc. 28; V. 151; — Pelew Ids, G. L. King, Esq. [P.]. 
0. 61) & 2 (Sc. 23; 
V. 147, 147; C. 52, 53). 
ao. Skeleton. Sumatra. 
r. Skull. Manilla. 
v. Skull. Java. 
2. Cerberus australis. (Puarn II. fig. 1.) 
Homalopsis australis, Gray, Zool. Mise. p. 65 (1842). ° 
Cerberus australis, Gray, Cat, p. 65 (1849). 
Closely allied to the preceding, but distinguished as follows :— 
Nasal cleft usually extending to the second upper labial; loreal in 
contact with the second and third labials. not touching the inter- 
nasal; three lower labials in contact with the anterior chin-shields, 
Scales in 25 rows, not so strongly keeled as in C. rhynchops. Slate- 
colour above, with transverse black spots, whitish and blackish 
beneath, with a regular series of large black blotches along each 
side of the belly. 
Total length 590 millim, ; tail 105. 
North Australia. 
a. 9 (V. 148; 0.47). Port Essington, Mr. Gilbert [C.]. a 
b. og (V. 149; C, 51). Port Essington. Sir J. Richardson p t 
3. Cerberus microlepis. (Pxazx II, fig. 2.) 
Cerberus cinereus, part., Gray, Cat. p. 64 (1849), 
Closely allied to C. rhynchops, but only three (exceptionally four) 
lower labials in contact with the anterior chin-shields; loreal not 
touching the internasal; scales much smaller, in 29 rows, rather 
feebly keeled; and ventrals more numerous, 163-165, Dark olive 
