LIZARDS. 193 



narrowed and with a triangular, compressed, vertical crest of 

 skin behind. Lower labial with a series of larger chin-shields be- 

 neath. Palate toothed. Throat with a cross fold and a small 

 pouch in front. Back and tail with a low serrated crest of com- 

 pressed scales. Scales of the back small, keeled, of the limbs and 

 belly larger, rhombic, keeled. Tail rather compressed, with a low- 

 crest of compressed scales, with equal keeled scales on the sides. 

 Femoral pores none. Toes elongate, unequal, compressed, with 

 2 or 3 keeled rhombic scales above and on the sides, with a series 

 of compressed scales beneath, each furnished with a central round 

 tubercle, the hinder toes with a narrow dentated fringe on the 

 outer side, and a veiy obscure one on the inner, the hinder outer 

 toes webbed at the base. 



The CoRYTH.^OLE. CorytliEeolus vittatus, Kaup. Isis^ 1829, 

 1147. Weigm. H. M. 15, 40, t. 15 (male). Basiliscus vittatus, 

 Weigm. Isis, 1828, 373. Wagler, Si/s. 148. Dum. et Bib. E. G. 

 iv. 187. B. lineatus. Gray, MSS. Miis. Col. Surg. n. 1306. 



Olive, with black cross bands, and 2 white streaks on each 

 side; male with a high, female with a low rounded occipital crest. 



a. In spirits, female with eggs. Olive, back with 6 black cross 

 bands, beneath pale, black-spotted, occipital crest low, head 

 black-spotted, with a narrow black streak on the lower part of 

 the temples. Honduras. From Mr. Johnson's collection. 



h. In spirits. Honduras. Like a, but pale streak more distinct, 

 black-edged on each side, as it arises from the eye, the hinder 

 edge of the gape of the mouth pale. 



W Head short, round and simjjle behind. 



17. Thysanodactylus. 



Head short, 4-sided, covered with small subequal keeled scales 

 the interparietal plate small. Eyebrows, occiput and temple co- 

 vered with smaller keeled scales. Eyebrows keeled. Chin with 

 a series of shields on each side under the labial shields. Nostril 

 lateral, anterior. Body compressed. Back with small squarish 

 convex or bluntly keeled scales, and the belly with larger square 

 smooth scales. Back and tail with a slight low crest of small 

 compressed scales. Tail elongate, slightly compressed, covered 

 with small square keeled scales, under side wider, with 3 or 4 

 ridges formed by the keel of the scales. Femoral pores none. 

 Toes slender, very unequal, compressed, with a series of compress- 

 ed keeled scales beneath, in the hinder ones forming a toothed 

 edge to their inner side, the hinder ones are furnished with a broad 

 continued scaly edge on the outer side, the outer hinder one with 

 a web at the base. 



