SNAKES. 25 



* Scales over the nostril of the males produced into a long recurved 



spine. 



1. The EiVER Jack. Clolho nasicornis, Gray, Zool. Misc. 69. 

 Coluber nasicornis, Shaiv, Misc. t. 94. Gen. Zool. iii. 397, t. 104. 

 V. nasicornis, Daud. Rept. vii. 322. Reinh. K. Dansk. Selsk. x. 

 273, t. 3,/. 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, E. W. Grays MSS. B. M. fide Shaic. 

 h. In spirits. Adult, male. Nasal horns large. Guinea. 



c. 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. Inspirits. Very young, female? Nasal horns none. Ashanle. 



From the Leyden Museum. 

 Vipera Schlegellii, Gray, B. M. 



The Das Adder of South Africa is a local variety or allied spe- 

 cies. A line specimen is in the museum of Dr. A. Smith. 



** Scales over the nostril in both sexes simple, arched. Eyebrow 

 scales simple. Bills. Echidna sp., Wagler, Syst. 



2. The Puff Adder. Clolho 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. brachvura, Cuv. R. A. ii. 90, ed. 2. Wagler, 

 Amph. t.ll. V. arietans, Schlegel, 577, t. 21,/. 1 — 3. Boie, Erp. 

 Java, t. 46. Cobra Clotho and Cobra Lachesis, Laur. R. 104 = 

 Seba, ii. t. 93,/. 1, t. 94,/ 2. Col. hebraicus, Lacep. Quad. 

 Ovip. ii. 106 = Seba, ii. i. 30, / 1 ; iii. t. 54, / 4. Vipera 

 Clolho (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 



