SNAKES. 109 



21. Eeyx. 



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, t. 1,/. II — 13. Anguis Jaculus and A. colubrina, 

 Hasselq. Linn. S. N. ii. 390. Anguis cerastes, Hasselq. Voy. App. 

 n. 67 (distorted). Linn. S. N. ii. 392. Eryx delta, Geoff. Rept. 

 Egypt., t. 6, /. 2. E. familiaris, Eversm. Zool. Spec. 176. Boa tur- 

 cica, Olivier, Voy. i. 329, ^.16, /. 2. Daud. Rept. vii. 267, t. 85, 

 /. 2, 3. t. 61, /. 34, 35. Eryx turcicus, Gray, Ann. Phil. x. 210. 

 Fitz. N. Syst. Rept. 54. Scytale, Aldrov. Serp. 233, Jig. Amphis- 

 baena Grevini, Aid. Serp. 239, Jig. 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. 



b. In spirits. Adult. Corfu. Presented by Dr. Benga. 



c. Inspirits. Half grown. Shores of Mediterranean. Presented 



by Dr. J. Miller, RN. 



d. e. In fluid. Half grower. Xanthus. Presented by Sir Charles 



Fellowes. 

 /. In spirits. Naxos, Greece. Presented by Capt. J. Ince, R.N. 

 </. 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 Shielded Eryx. Eiyx Thebaicus, Reuss. Mus. Senk. 

 i. 134. Dum. ^- Bib. Erp. Gen. vi. 468. Eryx scutata, Gray, Zool. 



L 



