358 AGAMIBiE. 



27. Agama planiceps. 



Agama planiceps, Peters, Mon. Berl. Ac. 1862, p. 15. 



Head small, much depressed. Nostril tubular, directed upwards 

 and backwards, pierced in the posterior part of a small nasal on the 

 caitthus rostralis. Upper head-scales smooth or feebly keeled ; 

 occipital enlarged ; sides of head near the ear, and neck, with 

 groups of short spines ; ear-opening large, entirely exposed, much 

 larger than the eye-opening. Throat much plicate; no regular 

 gular pouch. Body much depressed, covered above with moderate- 

 sized, roundish, not or but very slightly mucronate, imbricate 

 scales, with more or less strong keels converging towards the 

 vertebral line ; these dorsal scales much smaller than the caudals, 

 numbering fift)'^ to sixty-five from the origin of the fore limbs to the 

 origin of the hind limbs (counting on the vertebral line) ; a slight 

 nuchal but no dorsal crest ; ventral scales much smaller than the 

 dorsals, smooth ; sixty-four to eighty-six scales round the middle of 

 the body. Limbs long and strong, digits elongate; tibia longer 

 than the skull (to occiput) ; third and fourth fingers equal ; fourth 

 toe slightly longer than third, fifth extending beyond first. Tail 

 about twice and a half as long as the distance from gular fold to 

 vent, roundish in the female, compressed and keeled above in the 

 male, covered with large strongly keeled scales forming rather 

 distinct annuli. Male with a row of small pores. Olive-brown 

 above, with or without yellow spots and bands ; lower surfaces 

 yellowish, darker in the male. 



Total length (tail broken) 239 millira. Body 96 millim. 



Head 2Q „ Pore limb . . 63 „ 



Width of head 23 „ Hind limb . . 86 „ 



South-west Africa. 



a. c?. Duque de Bragance, Angola. Prof. B. du Bocage [P.]. 



b. $ . Carangigo. Dr. Welwitsch [C.J. 

 c-d. 5 & hgr. Damara Land. 



e,f. <S & yg. ? Berlin Museum. 



28. Agama atricollis. 



Agama atricollis, Smith, III. S. Afr., Hept. App. p. 14. 

 Stellio capensis, A. Dum. Cat. M4th. Itej)t. p. 1G6, and Arch. Mua. 

 viii. p. 679. 



Head large (especially in the male, which has the cheeks strongly 

 fiwollen), convex, with very prominent supraciliarj- ridges; nostril 

 lateral, slightly tubular, pierced on the canthus rostralis; upper 

 head-scales mostly feebly keeled : occipital not enlarged ; small 

 scattered spinose scales on the cheeks ; ear exposed , larger than the 

 eye-opening ; male without a regular gular pouch. Body moderately 

 depressed ; dorsal scales small, rhomboidal, keeled, larger on the 

 vertebral region, everywhere intermixed with enlarged, strongly 

 keeled, pointed scales, which sometimes form hmgitudinal series on 



