SNAKES. 109 
21. Eryx. 
Head covered with small, keeled scales, rather shielded in front ; 
nose shelving ; upper jaw rather longest: nostrils lateral, triangular, 
linear, between three plates, one internasal and two nasals: eyes 
lateral ; pupil erect, oblong: body fusiform: tail conical: scales of 
the back smooth ; of the hinder part of the body and tail keeled. 
Eryx, Gray, Ann. Phil. 1825, 210. Zool. Misc. 1842. Wag- 
ler, Syst. Amph. Erix, Cuvier, R. A. Eryx sp., Daud. Dum. & 
Bib. Erp. Gen. vi. 454. Pseudoboa sp., Schneider. 
* Gular groove distinct ; frontal 2 pairs. 
1. The Eryx. Eryx Jaculus, Daud. Gray, Zool. Misc. 45. 
Dum. & Bib. Erp. Gen. vi. 463. Tortrix Eryx, Schlegel, Phys. 
Serp. ii. 14, @ 1, f. 11—18. Anguis Jaculus and A. colubrina, 
Hasselq. Linn. S. N. ii. 390. Anguis cerastes, Hasselg. Voy. App. 
n. 67 (distorted). Linn. S. N. ii. 392. Eryx delta, Geoff. Rept. 
Egypt, t. 6, f. 2. E. familiaris, Eversm. Zool. Spec.176. Boa tur- 
cica, Olivier, Voy. i. 329, t. 16, f.2. Daud. Rept. vii. 267, t. 85, 
f. 2, 3. t. 61, f. 34, 35. Eryx turcicus, Gray, Ann. Phil. x. 210. 
Fitz. N. Syst. Rept. 54. Scytale, Aldrov. Serp. 233, fig. Amphis- 
bena Grevini, Ald. Serp. 239, fig. Boa tatarica, Lich. Verz. 104. 
Tail subconic, very blunt at the end, and covered with a large 
hemispherical scale; gular groove distinct; scales moderate, hex- 
angular, rather longer than broad ; vertebral plate small, distinct; 
one series of scales under the eye. 
a. In spirits. Adult. Egypt. Presented by Sir J. Gardener Wil- 
kinson. 
6. In spirits. Adult. Corfu. Presented by Dr. Benga. 
e. In spirits. Half grown. Shores of Mediterranean. Presented 
by Dr. J. Miller, R.N. 
d,e. In fluid. Half grown. Xanthus. Presented by Sir Charles 
Fellowes. 
f. In spirits. Naxos, Greece. Presented by Capt. J. Ince, R.N. 
y. In spirits. Young. From Dr. Heckel’s collection. 
Eryx Turcicus, Heckel. 
h—k. In spirits. Adult and young. Xanthus. Presented by Sir 
Charles Fellowes. 
** No gular groove ; frontals 1 pair. 
2. The Saretpep Eryx. Eryx Thebaicus, Reuss. Mus. Senk. 
1.134. Dum. & Bib. Erp. Gen. vi. 468. Eryx scutata, Gray, Zool. 
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