28 EEPTILES. 



1. The Cerastes. Cerastes Hasselquistii. Cerastes, ^e/o«, 

 Obs. ii. 54. Bruce, Trav. t. 14. Lacep. Quad. Ovip. ii. 72, t.l,f. 2. 

 Coluber Cerastes, Hasselq. Act. UpsaL 1750. Linn. S. N. i. 376. 

 JSllis, Phil. Trans. Ivi. t. 14. Shaw, Zool. iii. 385, t. 103. C. cor- 

 nutus, Hasselq. Reis. 365. Vipera Cerastes, Latr. Rept. iii. 313. 

 Z)a«((/. Rept. vi. 178, ^. 74, /. 1. Echidna Cerastes, Merrem, Tent. 

 150. Cerastes, Wagler, Si/st. Amph. 



Brownish white, with pale brown, irregular, unequal spots ; 

 scales broad, ovate, rounded at the end, keeled, placed in oblique 

 cross series ; keel not reaching to the end of the scale, enlarged at 

 the end ; scales of the crown moderate, smaller than those of the 

 back ; four or five rows of scales between the eyes and the labial 

 shields ; lower labial shields large, the first to the eighth higher 

 than long. Males with a horn-like scale over the eyes. 



a. In spirits. Adult. Egypt. From Sir Hans Sloane's collection. 

 6, c. In spirits. Adult, i. Young. Egypt. Presented by James 



Burton, Esq. 

 d, e. In spirits. Adult. Egj'pt. Presented by Sir J. Gardiner 



Wilkinson. 



Var. 1, or females? Eyebrows not horned. 



Coluber Vipera, Hasselq. Reis. 363. Linn. S. N. i. 375. 

 Aspis Cleopatrae, Laur. Rept. 105. Col. ^Egyptiacus, Lacep. Q. O. 

 ii. 65. Vipera iE gyptia, ia^r. Rept. iii. 320. V. ^gyptiaca. Baud. 

 Rept. vi. 2i2. Merrem, Tent. 152. 



/, g. In spirits. Adult. Egypt. Presented by Sir J. Gardiner 



Wilkinson. 

 h. Adult, k. Young. In spirits. Presented by James Burton, 



Esq. 



2. The Rough Cerastes. Cerastes Ritchii, Gray, Zool. 

 Misc. QQ 



Uniform pale brown : scales of head largest : cheek with only 

 three rows of scales between the eyes and the labial shields : lower 

 labipJ shield moderate ; the first long ; the second and third scarcely 

 higher than long ; the rest small, rather longer than high. More 

 rugose than C. Hasselquistii. 



a — c. Inspirits. Half grown (females?) without horns. Tripoli. 

 Presented by J. Ritchie, Esq. 



