6. CSBISTES. 



503 



l-g. (? (Sc. 31, 32 ; V 

 144,146; 0.42,42) 

 $ (Sc. 33, 34; V 

 151,144; 0.36,37) 

 & hgr. (Sc. 32,33: 

 V. 143, 145 ; 0. 34! 

 40). 



h-i,h-l. c? (Sc.31, 29 

 V. 144, 146; 0. 37 

 40) & $ (Sc. 33: 

 31; V. 148,148; 

 39, 37). 



m. $ (Sc. 31 ; V. 144 

 C. 33). 



«. Hgr. 9 (Sc. 30; V 

 148; C. 39). 



o-p. 6 (Sc.33;V.142 

 C. 38) & ? (Sc. 33 

 V. 161 ; 0. 33). 



o. (J (Sc. 31 ; V. 145 

 C. 38). 



r. Yg. (Sc. 33 ; V. 148 

 0.40). 



8. 2 (Sc. 33; V. 144 

 C. 29). 



t (J (Sc. 35; V. 140 

 0. 33). 



«. (J (Sc. 33; V. 141 

 C. 35). 



V. 6 (Sc. 32; V. 140 

 0. 34). 



w. d (Sc. 33 ; V. 139 

 0. 33). 



X. S (Sc. 35 ; V. 155 

 0.34). 



y. Hgr. 2 (Sc. 32; V, 

 164; 0.34). 

 SkuU of h. 



Egypt. 



Egypt. 



S. of Suez Canal. 



Gizeh. 



Luxor. 



Assouan. 

 Wadi Haifa. 

 Suakin. 

 Suakin. 

 Suakin. 

 Arabia. 

 Mount Sinai. 

 Timahat, Midian. 

 Hadramaut. 



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.]. 



Ool. Sir HoUed Smith 

 & Dr. J. Anderson [P.]. 



Dr. Penton & Dr. J. 

 Anderson [P.]. 



Dr. J. Anderson [P.]. 



Major Burton [P.]. 



I 

 Dr. J. Anderson [P.]. 



2. Cerastes vipera. 



Coluber vipera, Linn, in Hasselq. Seise Paleest. p. 314 (1762), and 



S. N. i. p. 375 (1766). 

 Aspis cleopatrae, Law. Syn. Sept. p. 105 (1768). 

 Vipera segyptia, Latr. Sept. iii. p. 320 (1802). 



segyptiaca, Daud. Mept. vi. p. 212 (1803). 



Cerastes ritchiei, Qray, Zool. MtsceU. p. 70 (1842), and Cat, p. 28 



(1849). 

 Echidna atricauda, part.. Bum. ^ Bibr. vii. p. 1430 (1854). 

 Vipera ayicennse, part., Jan, Rev. Sf Mag. Zool. 1859, p. 152, and 



Icon. GSn. 45, pi. v. fig. 4 (1874). 



avizennse, Strauch, Syn. Viper, p. 113 (1869). 



Cerastes vipera, Boaleng. Trans. Zool. Soo. xiii. 1891, p. 155, pl.xviii. 



fig. 2 ; Anders. Proc. Zool. Soc. 1892, p. 23 ; Werner, Verh. zool- 



bot. Ges. Wien, xliv. 1894, p. 86. 



Snout very short and broad. Eostral small, twice to thrice as 

 broad as deep; head covered with small, tuberoularly keeled. 



