SNAKES. 25 
* Scales over the nostril of the males produced into a long recurved 
spine. 
1. The River Jacx. Clotho nasicornis, Gray, Zool. Misc. 69. 
Coluber nasicornis, Shaw, Mise. t. 94. Gen. Zool. iii. 397, t. 104. 
V. nasicornis, Daud. Rept. vii. 322. Reinh. K. Dansk. Selsk. x. 
273, t. 3, f. 8,9. Vipera cornuta (monstrosity ?), Schlegel, Phys. 
Serp. 582, note. Cerastes (nasicornis), Wagler, Syst. Amph. 178. 
Echidna nasicornis, Merrem, Tent. 150. River Jack, Colonists. 
Black, paler marbled; back with a series of lozenge-shaped 
dark spots, separated by pale triangles on each side: head pale; 
crown with a large triangular mark, wide behind, a broad streak on 
the lore and larger one on the temple, and a large triangular spot 
under the eyes. 
a. In spirits. Adult, male. Nasal horns large. Guinea. 
Col. nasicornis, #. W. Gray's MSS. B. M. fide Shaw. 
b. In spirits. Adult, male. Nasal horns large. Guinea. 
ec. In spirits. Head and neck of half-grown male. Nasal horns 
moderate. Coast of Africa. 
d. In spirits. Young, female? Nasal horns none. Coast of Africa. 
e. In spirits. Very young, female? Nasal horns none. Ashante. 
From the Leyden Museum. 
Vipera Schlegellii, Gray, B. M. 
The Das Adder of South Africa is a local variety or allied spe- 
cies. A fine specimen is in the museum of Dr. A. Smith. 
** (Scales over the nostril in both sexes simple, arched. Eyebrow 
scales simple. Bitis. Echidna sp., Wagler, Syst. 
2. The Purr AppEer. Clotho arietans, Gray, Zool. Misc. 69. 
Echidna arietans, Merrem, Beitr. iii. 121. Tent. 152. Wagler, 
Syst. 177. Vipera inflata, Burchell, Trav. i. 469. Smith, Edinb. 
Journ. i. 284. V. brachyura, Cuv. R. A. ii. 90, ed. 2. Wagler, 
Amph. t.11. V.arietans, Schlegel, 577, t. 21, f. 1—3. Bote, Erp. 
Java, t.46. Cobra Clotho and Cobra Lachesis, Laur. R. 104 = 
Seba, ii. t. 93, f. 1, «. 94, f. 2. Col. hebraicus, Lacep. Quad. 
Ovip. 11. 106 = Seba, ii. t. 30, f. 1; iii. ¢. 54, f. & © Vipera 
Clotho (part), Daud. Rept. vi. 171, from Seba. Col. dubius, Gmelin, 
S.N.i. 1086. Col. Bitis, Bonnat, Oph. 22. Col.intumescens, Donnd. 
Zool. Beyt. iii. 209. Vipera severa, Daud. Rept. vi. 116. Pof 
Adder or Puff-otter, Paterson, Trav. 162. Cape Colonists. 
D 
