SNAKES. par), 
6. The AtceRINE AppEr. Clotho? mauritanica. Echidna 
mauritanica, Dum. § Bib. Exped. Sci. Alger. Rept. t. 3, no dese. 
Brown: back with large, oval, nearly contiguous cross-bands : 
sides with a sinuous pale streak: head pale; temporal streak sim- 
ple, dark; superciliary shields 3-3, simple. 
Inhab. Algiers. Mus. Paris. 
*** Nasal plate simple : eyebrows of males ? or both sexes with a 
group of small horn-like scales over the eyes. 
7. The Hornep AppEr. Clotho cornuta. Vipera cornuta, 
Daud. vi. 188. Schlegel, 582, t. 21, f. 8,9. A. Smith, Ill. Z. 8S. 
Afr. Rept. 32. V. Lophophrys, Cuvier, R. A. ii. 92, ed: 2, 4. Pater- 
son, Trav. t.15. A. Smith, Ill. Zool. S. A. Rept. t. 33. V. armata, 
A. Smith, Edinb. Journ. i. 2. Gehorne Schlange, Lichst. Reise. 
i. 153. Cerastes cornuta, Gray, Zool. Misc. 96. Cerastes ? cauda- 
lis, Gray, Zool. Mise. 96. Vipera (Cerastes) caudalis, A. Smith, 
Illust. Zool. S. Africa, Rept. t. 7. Vipera ocellata, A. Smith, 
Mag. Nat. Hist. (1838), ii. 92, not Daud. 
Gray-brown, minutely and closely black-dotted ; back with four 
series of irregular dark spots; sides dark marbled; scales rather 
elongate, keeled to the rather acute tip: the first, second and third 
lower labial shields high ; the rest moderate, nearly square. 
a. In spirits. Half grown. Cape of Good Hope. Presented by 
Ford, Esq., 72nd Reg. From the Chatham Museum. 
b,c. In spirits. Adult and young. S. Africa, Cape of Good Hope. 
Presented by the Earl of Derby. 
b. Nostrils small, sublateral, anterior. Cerastina. 
3. CERASTEs. 
Subcaudal plates two-rowed : nostrils lunate, in the hinder part 
of a small nasal plate: superciliary shields very small, scale-like : 
eyebrows of males often horned: scales keeled, broad, ovate, rounded 
at the end, placed in oblique cross-series: keel not reaching the 
tip. 
x Cerastes, Wagler, Syst. Amph. 173, 1830. Gray, Zool. Mise. 
96. Aspis sp., Laur. Fitzinger. Cobra, Gray, Ann. Phil. 1825, 
205. Cobra sp., Laur. 
