236 THE REPTILES OF EGYPT. 
ERYX. 
Eryx, part., Daud. Rept. vii. 1803, p. 251. 
Head not distinct from the neck ; body cylindrical ; tail short, thick, conical, or 
terminating in a sharp point. Upper surface of head scaly ; rostral large ; eye small, 
pupil vertical. Body-scales small, smooth or keeled, numerous; subcaudals single. 
Maxillary and mandibular teeth decreasing in length from before backwards. 
Eryx thebaicus, Eeuss. (Plate XXXII. fig. 2.) 
? Anguis colubrinus, Hasselq. & Linn. Iter Palaest. 1757, p. 320; Linn. Syst. Nat. i. 1766, p. 390. 
? Anguis colubrinus, Gmel, Linn. Syst. Nat. i. pt. 3, 1788, p. 1119 ; Schn. Hist. Amph. 1801, p. 338. 
? Eryx colubrinus, Daud. Hist. Rept. vii. 1803, p. 261. 
? Tortrix colubrina, Merr. Syst. Amph. 1820, p. 83. 
Eryx de la Thebaide, Is. Geoff. St.-Hil. Descr. de l'figypte, Hist. Nat. i. ? 1827, p. 141, pi. vi. fig. 1. 
Eryx thebaicus, Reuss, Mus. Senck. i. 1834, p. 134; Dum. & Bibr. vi. 1844, p. 468 ; Schleg. 
Bijdr. tot de Dierkunde, i. 1848, p. 2; Gray, Cat. «nakes B. M. 1849, p. 109; A. Dum. 
Cat. Rept. Paris Mus. 1851, p. 214 ; Jan, Iconogr. Gen. 4 livr. 1864, pi. i. fig. 2, et texte, 
1865, p. 73; Westphal-Castel. Cat. Coll. Rept. 1869, p. 27; Peters, Mon. Berl. Ak. 1878, 
p. 205 ; Miiller, Verh. nat. Ges. Basel, vii. 1882, p. 141 ; Mocquard, Mem. Cent. Soc. Philom. 
1888, p. 122*; Sclater, Snakes Ind. Mus. 1891, p. 6; Blgr. Cat. Snakes B. M. i. 1893, p. 125; 
Proc. Zool. Soc. 1896, p. 216; Ann. Mus. Civ. Genova, (2) xvi. (xxxvi.) 1896, p. 552; op. cit. 
(2) xvii. (xxxvii.) 1896-97, p. 20 et p. 279; Anderson, Herpet. Arabia & Egypt, 1896, p. 106. 
Eryx scutata, Gray, Zool. Misc. 1842, p. 45. 
Eryx jaculus, var. sennaariensis, Jan, Iconogr. Gen. 4 livr. 1864, pi. ii. fig. 2. 
Erix thebaicus, Gasco, Viagg. in Egitto, pt. ii. 1876, p. 116. 
Eryx jaculus, var. surinamensis , Parenti e Picaglia, Rett, ed Anf. Mar Rosso, 1886, p. 38. 
Gongylophis thebaicus, Blgr. Ann. & Mag. N. H. (6) ix. 1892, p. 76. 
1 The rock-snake, Python seba>, Gmel., which attains to 7 metres in length, was observed 100 years ago in 
Abyssinia by Bruce the traveller f. In 1836 J M. d'Arnaud obtained it on the Expedition sent by 
Mohammed Ali to discover the sources of the White Nile, but the locality where it was found has not been 
stated. Petherick § met with it to the south of Khartum. Boulenger has recorded it from Somaliland ||. 
It is mentioned here, as it may possibly have a more northerly extension than Khartum. 
t Voy. Abys. v. 1790, p. 199. 
X Dum. & Bibr. Erpet. Gen. vi. 1844, p. 406 ; A. Dum. Cat. Rept. Paris Mus. 1851, p. 210. 
§ Blgr. Cat. Snakes B. M. i. 1893, p. 87. 
|| Ann. Mus. Civ. Gen. (2) xvii. (xxxvii.) 1S96, p. 20. 
