o-p. d (Sc. 33; V. 142; 
C. 38) & 9 (Se. 33; 
V. 151; GC. 33). 
g. d (Sc. 81; V. 145; 
G. 38). 
r. Yg. (Se. 33; V.148; 
©. 40), 
e. @ (Se. 885 V. 144; 
t. g (Sc. 35; V. 140; 
u. ¢ (Sc. 33; V. 141; 
. 82; V. 140; 
w. ¢ (Sc. 33; V. 139; 
. 35; V. 155; 
y. Her. 2 (Sc. 32; V. 
164; C. 34), 
Skull of 2. 
6. CERASTES. 
Egypt. 
Egypt. 
S. of Suez Canal. 
Gizeh. 
Luxor. 
Assouan. 
Wadi Halfa. 
Suakin. 
Suakin. 
Suakin. 
Arabia. 
Mount Sinai. 
Timahat, Midian, 
Hadramaut. 
2. Cerastes vipera, 
503 
J. Burton Esq, [P.]. 
Sir J. G. Wilkinson [P.]. 
Dr. J. Anderson [P.]. 
Dr. J. Anderson [P.]. 
Dr. J. Anderson [P.] 
Dr. J, Anderson [P.]. 
Dr, J. Anderson [P.]. 
Col. Sir Holled Smith 
& Dr. J. Anderson LF 
Dr. Penton & Dr. J. 
Anderson [P.]. 
Dr. J. Anderson [P.]. 
Major Burton [P.]. 
Dr. J. Anderson [P,]. 
Coluber vipera, Linn. in Hasselg. Reise Palest. p, 314 (1762), and 
S. NV. i. p. 375 (1766). 
Aspis cleopatree, 
ur. Syn. Rept. p. 105 (1768). 
Vipera xgyptia, Latr. Rept. iii. p. 320 (1802). 
—— egyptiaca, Daud. Rept. vi. p. 212 (1803). 
Cerastes ritchiei, Gray, Zool. Muscell. p. 70 (1842), and Cat. p. 28 
(1849). 
Kchidna atricauda, part., Dum. § Bibr. vii. p. 1430 (1854). 
Vipera avicennee, p 
Icon. Gén, 45, p 
art., Jan, Rev. § Mag. Zool. 1859, p. 152, and 
v. fig. 4 (1874). 
avizennee, Strauch, Syn. Viper. p. 113 (1869). 
Cerastes a i Bouleng. Trans. Zool. Soc, xiii. 1891, p. 155, pl. xviii. 
fig. 2; Anders. Proc. Zool. Soc. 1892, p. 238; Werner, Verh. zool.-. 
bot. Ges. Wien, xliv. 1894, p. 86. 
Snout very short and broad. Rostral small, twice to thrice as 
broad as deep; head covered with small, tubercularly keeled, 
