28 REPTILES. 
1. The CerastEs. Cerastes Hasselquistii. Cerastes, Belon, 
Obs, ii. 54. Bruce, Trav. t.14. Lacep. Quad. Ovip. ii. 72, t.1, f. 2. 
Coluber Cerastes, Hasselg. Act. Upsal. 1750. Linn. S. N. i. 376. 
Ellis, Phil. Trans. \vi. t. 14. Shaw, Zool. iii. 385, t. 103. C. cor- 
nutus, Hasselg. Reis. 365. Vipera Cerastes, Latr. Rept. iii. 313. 
Daud. Rept. vi. 178, t. 74, f.1. Echidna Cerastes, Merrem, Tent. 
150. Cerastes, Wagler, Syst. 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. 
b,c. In spirits. Adult. 2 Young. Egypt. Presented by James 
Burton, Esq. 
d,e. Inspirits. Adult. Egypt. Presented by Sir J. Gardiner 
Wilkinson. 
Var. 1, or females? Eyebrows not horned. 
Coluber Vipera, Hasselg. Reis. 363. Linn. S. N. i. 375. 
Aspis Cleopatre, Laur. Rept. 105. Col. Aigyptiacus, Lacep. Q. O. 
ii. 65. Vipera Hgyptia, Lair. Rept. iii. 320. V. Hgyptiaca, Daud. 
Rept. vi. 212. Merrem, Tent. 152. 
f,g. In spirits. Adult. Egypt. Eresented by Sir J. Gardiner 
Wilkinson. 
A. Adult. &. Young. In spirits. Presented by James Burton, 
Esq. 
2. The Roucu Crerasres. Cerastes Ritchii, Gray, Zool. 
Mise. 96. 
Uniform pale brown: scales of head largest: cheek with only 
three rows of scales between the eyes and the labial shields: lower 
labial shield moderate ; the first long ; the second and third scarcely 
higher than long; the rest small, rather longer than high. More 
rugose than C. Hasselquistit. 
a—c. In spirits. Half grown (females?) without horns. Tripoli. 
Presented by J. Ritchie, Esq. . ’ 
