186 
Annals oe the Transvaal Museum. 
Rows around the middle of the body 77-81. 
Fingers : Third and fourth nearly equal. 
Toes : Third as long as or slightly shorter than the fourth, fifth extending 
beyond the first. 
Tail slightly compressed, scales strongly keeled. 
Colouration : Olive or brown above, with a row of more or less distinct 
large brown spots on each side of the vertebral line, or a single row 
of large spots ; lower surfaces lighter, throat dotted blackish. 
Remarks : This species may he found to occur in the northern portion 
of the sul>Continent ; the description has been taken from Boulenger 
(loc. cit. p. 353) and Fischer (Jahresb. Naturh. Mus. Hamb. f. 1883). 
B. Dorsal Scales Intermixed with Enlarged Spinose Scales. 
5. AGrAMA ATRICOLLIS. SMITH. 
Plates XVII and XVIII. 
Dorsal scales small, keeled, mostly mucronate, larger on the median line, 
intermixed with enlarged, strongly keeled and pointed scales, with a 
strong tendency to form straight, vertical and transverse lines. A 
curved fold on each side of the body is marked by slightly enlarged, 
pointed scales. , 
Upper head scales smooth or feebly keeled ; occipital not enlarged, usually 
smaller than the surrounding scales. A few conical scales on the 
snout. 
Spines on the sides of the head small, scattered or in short rows of two or 
three, chiefly on the cheeks, which are very swollen in adult males, 
less so in females. The cheeks sometimes almost hide the ear. A 
few enlarged conical scales usually margin the ear. 
Nostril somewhat tubular, pierced just below the canthus rostralis, or just 
touching it with the upper edge. 
Crests : The nuchal crest is marked by a series of enlarged keeled pointed 
scales, sometimes extending on to the anterior portion of the back. 
Scales on the limbs, strongly keeled and mucronate, the keels combining 
to form regular curved lines, size on the average larger than the 
dorsals, usually irregular. 
Ventral scales smooth. 
Tail covered with strongly keeled scales, largest above forming rather 
regular annuli. In some specimens every three or four rows of scales 
seen from the side, form an annulus, by reason of the rows 
increasing in size from 1-3 or 4 ; in these cases one or two rows of 
scales on the upper surface often correspond to 3 or 4 on the sides. 
Fingers : Third and fourth almost equal, fifth extending well beyond first. 
Toes : Fourth very slightly longest, fifth considerably longer than first. 
Anal pores in two rows. 
Colouration in spirits olive or brown above, yellowish beneath, sometimes 
reticulated with black. The enlarged scales of the back often lighter. 
Young specimens often grey with black X shaped markings above, 
and black annuli on the tail. In life, the adults are very different 
objects, their colours bfeing much brighter, and capable of being 
changed at the will of the animal. When excited, the males have 
bright blue or green heads, backs and ventral surfaces. Females 
and young do not appear to show the green or blue tints to the same 
extent. 
