54, ZAMENIs, 409 
| subocular; four or five lower labials in contact with the anterior 
chin-shields; posterior chin-shields as long as the anterior, narrow 
and separated from each other by two or three series of scales. 
Scales smooth, in 25 (rarely 23) rows. Ventrals obtusely angulate 
laterally, 214-232; anal divided or entire; subcaudals 87-104. 
Pale olive or greyish above, with three alternating series of blackish 
transverse bars, and a series of black spots along each side of the 
belly ; a more or less distinct blackish crescentic band on the nape, 
extending to the sides of the throat; a blackish spot below the eye ; 
lower parts white. 
Total length 940 millim. ; tail 230. 
Algeria aud Tunisia. 
a. o (V. 215; A.2; C. 99). Tozeur, Tunisia, M. F. Lataste [P.}. 
b. Yg. (V. 214; A. 1; C. 92). Houmt-es-Souk, M. F. Lataste [P.}. 
Djerba, Tunisia. 
c-d. 3 v . 218; A.1;C.104) Duirat, Tunisia. Dr. J. Anderson [P.]. 
& 9 (V. 231; A. 2; C. 87). 
e. Yg. (V. 222; A.2; C.99). ——? 
27. Zamenis hippocrepis. 
Coluber hippocrepis, Linn. Mus. Ad. Frid, p. 36, pl. xvi. fig. 2 
(1754), and 8. WV. i. p- 388 (1766); Daud. Re t. vi. Ls 249 (1803) ; 
Bonap. Icon. Faun. Ital. (1835); Schleg. Phys. Serp. ii. p. 164, 
pl. vi. figs. 15 & 16 (1837). 
ae 5 oa ars 8. a i. p. 389; Daud. t.c. p. 242. 
atrix hippocrepis, r. Syn. Rept. p. 77 (1768). 
—— bahiensis, Wagl. in Spix, Serp. Pres: p- 27, pl. x. fig. 1 (1824). 
Periops hi is, Wagl. Icon. Amph. pl. xxxi. (1830) ; Guichen. 
Explor. Se. Alg., Rept. p. 19 (1850); Dum. & Bibr. ve 675 
gee) ; De Betta, Faun. Ital., Rett, oe 40 (1874) ; retb. 
erp. Bur. p. 200 (1875); Jan, Icon. Gén. 48, pl. iv. fig. 1 (1876) ; 
Camerano, Mon. Ofid. Ital., Colubr. p. 48 (sol), 
cy re hippocrepis, Eichw. N. Mém. Soc. Nat. Mose. ix. 1851, 
shies hi pis, Giinth. Cat. p. 103 (1858); Strauch, Erp. 
Aly. ay (1862); Boettg. Abh. Senck, Ges, ix. 1874, p. 157, 
xii. 1881, p, 374, xiii. 1883, p. 100, and in Kobelt, Reis. Alg. 
Tunis, p. (1885) ; Bouleng. Tr. Zool. Soc. xiii. 1891, p. 147. 
Tyria hippocrepis, Cope, Proc. Ac. Philad. 1862, p. 338. 
Snout feebly projecting, obtuse. Rostral once and one third to 
once and a half as broad as deep, the portion visible from above 
measuring about one third its distance from the frontal ; internasals 
as long as or a little shorter than the prefrontals; frontal con- 
siderably broader than the supraocular, once and one fourth to 
once and a half as long as broad, as long as or a little longer than 
its distance from the end of the snout, shorter than the parietals, 
and in contact with the preocular ; loreal longer than deep ; one or 
two preoculars; two postoculars; a series of three or four sub- 
oculars usually completely separates the eye from the labials; 
temporals 2+% or 343; eight or nine (rarely ten) upper labials, 
