244 
Transactions of the Uoyal Society of South Africa. 
1. 
2. 
y. 
4. 
Snout to vent 
82 
80 
83 
75 
Head 
21 
19 
20 
18 
Width of head . 
21 
20 
20 
18 
Depth of head 
14 
12 
13 
12 
Diameter of eye-cleft . 
4 
3-5 
3-5 
3-5 
,, ear-openiiig- 
4 
3-5 
4 
3-5 
Fore limb . 
34 
31 
36 
34 
Hand 
12 
11 
13 
12 
Hind limb . 
49 
45 
48 
44 
Tibia 
17 
16 
17 
15 
Foot .... 
17 
16 
17 
16 
Tail .... 
100 
77 
62 
59 
1. ^ , Pretoria. 2. J , Kustenbiirg. 3,4. Pretoria. 
Lepidosls. — Upper parts rough with enlarged spinose scales as in A. 
hispida, but often not so strongly, the smaller scales very small, strongly 
keeled but not mucronate (except low down on the sides) ; 85 to 110 scales 
round the middle of the body* ; sojne of the spinose scales may form longi- 
tudinal series on the back ; the largest spinose scales near the ear-opening 
shorter than the diameter of the latter ; vertebral crest very low but distinct 
on the nape, just indicated or absent on the back. Upper head-scales unec^ual, 
and more or less strongly keeled, 3 to 5 enlarged in the middle of the snout ; 
occipital enlarged ; 12 to 16 scales across the head from one superciliary series 
to the other; 11 to 16 upper labials on each side; 2 to 4 series of scales 
betw^een the upper labials and the nasal. Grular and ventral scales smooth 
or faintly keeled, not or but very shortly mucronate, except on the sides. 
Upper scale at base of claw not or ljut slightly longer than the others; 12 
to 15 scales in a longitudinal series under the third toe. Caudal scales 
strongly keeled, feebly mucronate, not forming whorls, equal except at the 
base, wdiere their character partakes of that of the body. Scales on upper 
surface of tibia very unequal in size. Male with a single row of rather 
small preanal pores. 
Coloration.— GrveyislioliYe or brown above, with a yellow vertebral stripe 
from the occiput to the tail, where it merges into the pale colour of that 
organ ; this vertebral stripe may be incompletely divided by an interrupted 
dark line along the median series of scales ; back uniform (females) or with 
large squarish dark brown spots forming a series on each side of the vertebral 
stripe ; upper surface of head with symmetrical dark and light markings, 
in the form of bars or chevrons between the eyes ; head sometimes blackish 
above (female from Pretoria) ; limbs and tail with dark cross-bars. Lower 
* The range of variation for all the specimens in the British Museum is 85 to 115. 
