Annals of the Transvaal Museum. 
137 
Family ZONURIDAE. 
Genus ZONURUS, Merrem. 
Bouleng., B. M. Cat. 11, p. 252. 
Z. polyzonus , Smith. 
Cordylus polyzonus, Smith, Mag. N. H. (2) II, 1838, p. 34: 111. Kept. PI. XXVIII, fig. 1, 
and XXX, fig. 7. 
Z. polyzonus, Bouleng., 1. c. p. 257 : Hewitt and Power, Trans. R. S. S. A. Ill, p. 154. 
12 examples from Aus and the Great Karas Mountains. 
The largest specimen measures 120 + 93 mm. (tail regenerated) from 
Aus, 3150 : another specimen taken between Kraikluft and Wasserfall 
measures 102 + 118 mm., 3149. Other localities : 3146, 3147, 3152, 3154- 
3156, Kraikluft, at 5200 feet: 3148 (102 + 130 mm.), between Sandmund 
and Kraikluft : 3151, 3157, between Kraikluft and Alt Wasserfall. 
Our specimens were found in the crevices of rocks. The species 
occurs frequently in the neighbourhood of human dwellings. 
Z. namaquensis , sp. nov. 
11 examples from the Great Karas Mountains. Localities : on the top 
of a mountain at about 6200 feet, near Wasserfall, 3161 and 3168 : 3166, 
Sandmund • 3158-3160 (3160, juvenile), 3162-3165, and 3167, at Narudas 
Slid, in the crevices of rocks in the river bed. 
Related to Z. pustulatus , Pet., but in the character of the nostril 
resembling Z. cataphr actus, Boie. 
Description : head and body much depressed : head expanded, more 
or less triangular in shape, and a trifle longer than broad : temporal spines 
moderately or even poorly developed : scutes of the head rugose and 
ribbed : nostril facing laterally or laterally and upwards in a single nasal, 
which is large, much swollen, and tubular : nasals usually in contact — the 
suture so formed being short — sometimes separated by a small scale. 
Fronto-nasal large, not reaching the rostral. Labials not entering the 
eye : lower eyelid opaque. 
Dorsal scales usually in 28 transverse series (in one specimen 
only 24, and in a juvenile individual as many as 32). The dorsal 
scales are moderately or even weakly keeled, much more strongly 
so and spinose at the sides : those on the sides of the neck particularly 
spinose. This dorsal scaling is sharply marked off at the sides : along the 
flanks is a narrow area covered with smooth small or very small almost 
granular scales which pass gradually into the ventrals. The second, 
third, and sometimes the fourth transverse row of scales immediately 
behind the occiput a little longer than the succeeding ones : those over 
the lumbar region the shortest. Ventral scales in 18 longitudinal series, 
those in the middle of the belly including about 14 scales. Anterior 
gulars smooth not granular. Caudal scales strongly keeled and spinose 
throughout, the spines longest laterally : about 26 to 30 whorls of scales 
on the tail. 
Colour : lighter or darker chestnut brown above, with dark brown or 
black mottlings : head darker than the rest of the body ; below generally 
a light muddy brown colour. 
Measurements; length 81 *4 + 89 mm.: length of head 21 mm., 
breadth 18 mm. 
Type, T. M. Cat. Rept. No. 3163, in the Transvaal Museum. 
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