256 ZONURID^. 



pores on each side. Tail with whorls of large, strongly keeled, 

 spinose scales, the spines very large on the upper and lateral sur- 

 faces. Yellowish brown, belly clouded with dark brown ; gular 

 region dark brown, spotted with light yellow. 



millim. millim. 



Total length 203 Fore limb 37 



Head 29 Hind limb 45 



Width of head 28 Tail 100 



Body 74 



South Africa. 



a-b. c? & hgr. Western coast of Cape Colony. Sir A. Smith [P.]. 



4. Zoniirus cordylus. 



Zonurus cordylus, Gray, Cat. p. 47. 



cataphractus («o?i Bote), Gray, I. c. 



Lacerta cordylus, Linn. S. A", i. p. 301. 

 Cordylus verus, Laur. Syn. JRept. p. 52. 

 Stellio cordylus, Dnud. Hept. iv. p. 8. 

 Zonurus cordylus, Merr. Tent. p. 57. 



Cordykis griseus, Cuv. R. A. 2ud ed. ii. p. 33 ; Smith, Mag. N. H. 

 (2j ii. p. 31, and III. S. Afr., liept. pi. xxviii. figs. 2, 3, & xxx. 

 %.8. 



nigei", Cnv. I. c. 



dorsalis, Cuv. I. c. 



Zonurus vertebralis, Gray, Ann. N. H. i. 1838, p. 388. 

 griseus, Diini. Sf Bibr. v. p. 350. 



Head much depressed, much longer than broad. Head-shields 

 slightly rugose ; nasals not swollen, in contact, pierced in their 

 posterior part ; frontonasal hexagonal, broader than long, followed 

 by a pair of proefrontals forming a suture ; frontal pentagonal, a 

 little wider anteriorly ; interparietal small, quadrangular, in the 

 middle between the two pairs of parietals, of which the posterior is 

 the largest ; temporals slightly keeled, in four longitudinal rows ; 

 no spines ; four supraoculars ; three supraciliaries ; lower eyelid 

 opaque ; a small loreal ; a large prasorbital ; three infraorbitals ; 

 live or ^ix upper labials, posterior largest; rostral three to four 

 times as broad as high. Mental rather large, tetragonal or penta- 

 gonal ; five or sis lower labials, posterior largest and keeled, bordered 

 b}' a row of five large shields, the fourth of which is the largest ; 

 gular scales moderate, sub([uadrangular, imbricate, larger and more 

 rounded on the neck ; sides of neck with spinose keeled scales. 

 Dorsal scales large, forming regular transverse series, imbricate, 

 subquadrangular, more or less strongly keeled, shortly mucronate, 

 frequently serrated ; on the flanks similar, but more strongly 

 keeled ; a distinct lateral fold ; twenty-five to twenty-eight cross 

 series of scales from occiput to base of tail, the largest containing 

 sixteen or eighteen scales. Ventral scales smooth, quadrangular, a 

 little broader than long, slightly imbricate, forming ten to fourteen 



