1. zonuRus. 257 
regular longitudinal, and twenty-three to twenty-seven transverse 
series, those of the outermost series shortly mucronate and frequently 
feebly keeled. A pair of enlarged posterior preanal scales. Limbs 
above with large spinose, serrated, imbricate keeled scales, inferiorly 
with smooth or feebly keeled ones. Femoral pores six to nine on 
each side. Tail with whorls of large, strongly keeled, spinose, ser- 
rated scales, the spines strongest on the sides. Upper parts yellowish, 
olive, or blackish-brown, uniform or variegated with darker ; some- 
times a reddish band along each side; lower surfaces yellowish or 
greenish white. 
millim. millim. 
Total length ...... 174 Fore limb ........ 30 
ead is 4 tee sae gx 24 Hind limb........ 41 
Width of head .... 19 WAL. SeceeG esecess esac 90 
Body’ song saccweanitors 60 
South Africa. 
a 3. Damara Land. 
ba 6. East London, British HH. Trevelyan, Esq, [P.]. 
Kaffraria. 
6x Bis Kaffraria, 
d-e, Yg. Cape Colony. F, P. M. Weale, Esq. [P.]. 
Fe Qs Cape. Prof. Busk by i 
g 3. 8. Africa. Earl of Derby [P.]}. 
h So. S. Africa. C. Darwin, Esq. [P.]. 
el, m-n,0,p,g,7r 8. Africa, 
3, 2, & her, . 
3, t. Ad., stuffed. S. Africa. (Types of Z. vertebralis.) 
w. Ad., stuffed. 8. Africa. 
5. Zonurus polyzonus. 
Cordylus polyzonus, Gray, Cat. p. 47. 
Cordylus polyzonus, Smith, Mag. N. H. (2) ii. 1888, p. 34, and IU. 
8S. Afr., Rept, pl. xxviii. fig. 1, and xxx. fig. 7. 
Zonurus polyzonus, Dum. § Bibr. v. p. 357; Peters, Mon. Berl. Ac. 
1862, p. 18. 
Head and body much depressed. Head longer than broad, with 
slightly rugose shields, Nasal very small, pierced posteriorly; a 
larger supranasal forming a suture with its fellow ; frontonasal hexa- 
gonal, broader than long, followed by a pair of preefrontals ; frontal 
hexagonal or pentagonal, slightly wider anteriorly ; interparietal 
small, quadrangular, in the middle between the two pairs of parietals, 
the posterior of which is a little larger than the anterior ; temporals 
strongly keeled, in five or six longitudinal rows, upper smallest; a 
short spine in front of the ear ; four supraoculars, anterior largest ; 
three supraciliaries; a loreal, a larger preorbital; three infra- 
orbitals, second descending to the lip, separating the fourth and 
fifth labials ; six upper labials ; rostral three to four times as broad 
as high, Mental pentagonal or tetragonal; six lower labials, 
VOL. IT. 8 
