ADDENDA AND COEIUGENDA. 495 



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22 a. Agama boulengeri. 

 Agama boidengeri, Lataste, Le Naturaliste, 1886, p. 212. 



Nostril tubular, pierced in the posterior part of the nasal on the 

 canthus rostralis. Upper head-scales keeled ; occipital enlarged ; 

 sides of head and neck with groups of small spinose scales ; ear 

 entirely exposed, scarcely larger tlum the eye-opening ; no regular 

 gular pouch. Body feebly compressed ; dorsal scales equal, regular, 

 not or very feebly mucronate, feebly imbricate, strongly keeled, the 

 keels converging towards the vertebral line ; ventrals nearly as 

 large as dorsals, smooth ; at least one hundred scales round the 

 middle of the body ; a low nuchal and dorsal crest. Tibia longer 

 than the head : third and fourth fingers equal ; fourth toe slightly 

 longer than third, fifth extending beyond first. Tail about twice as 

 long as the distance from gular fold to vent, very strongly compressed, 

 covered with strongly keeled scales forming rather distinct an null ; 

 a very strong crest of long compressed scales bent backwards, much 

 more developed than the dorsal. Male with a row of anal pores. 

 Grey-brown above, speckled with yellowish, the specks forming 

 transverse series on the body ; lower surfaces yellowish. 



millim. millim. 



Total length 240 Fore limb 47 



Head 21 Hind limb 78 



Width of head 21 Tail 138 



Body 82 



Medina, Upper Senegal. 



Closely allied to A. hirlii, but distinguished by the shape of the 

 tail, which is more compressed and more highly crested than in any 

 other species of Agama. 



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25 a. Agama doriae. 



Agama dorise, Bouleng. Ann. Mus. Genova (2), ii, 1885, p. 127. 



Intermediate between A. coJonorum and A. hibronii. JSTostril 

 tubular, directed outwards and backwards, pierced below the canthus 

 rostralis. Upper head-scales smooth or indistinctly keeled ; occi- 

 pital enlarged ; eight to ten upper labials ; sides of head and neck 

 with groups of small spines, the largest of which measure hardly 

 half the diameter of the tympanum, which is large and entirely 

 exposed. A slight nuchal crest. Dorsal scales shortly mucronate, 

 45 to 50 on the vertebral line between the origin of the fore limbs 

 and the origin of the hind limbs, and 74 to 84 round the middle of 

 the body. Fourth toe scarcely longer than third, measuring the 

 distance between the posterior border of the eye and the end of the 

 snout or the anterior border of the nasal shield. Male with a row 

 of anal pores. Yellowish or olive above, with usually feebly marked, 

 small, dark marblings or reticulations ; usually two blackish lines 



