208 Mr. Gray's Description of a nexv Genus of Saurian Reptiles ' 



they may be thus described, after the nomenclature used by 

 the German zoologists: One rostral shield; then a group of 

 6 or 7 small nasal scales on each side ; 2 anterior frontals ; 3 

 posterior frontals in across band ; 4 vertebral scales; 6 super- 

 ciliary band-like scales over each eye; 10 occipital shields; 

 the first 5 small, forming a narrow, and the hinder 5 larger 

 and longer, forming a broad band; so that there are 8 large 

 scales on each side, and 3 odd or medial scales, without the 

 superciliary ones. 



L. carinatus, n. 



Cauda corpore longiore ; capite glabro ; squamis latis lan- 

 ceolatis, dorsi carinatis aculeatis, abdominis glabris vix cari- 

 natis, dorso oblique multum carinato. 



Inhab. ? Miis. Britan. 



Length 8 inches; body '6\, tail 44. 



Tail rather longer than the body; head smooth. Scales 

 broad lanceolate, those nearer the head the smallest, those of 

 the back, upper part of limbs and tail strongly midribbed and 

 ending in sharp tips, so as to form raised longitudinal lines, 

 tending obliquely towards the tail; the dorsal line the largest. 

 The scales of the lower parts smooth, scarcely midribbed, green 

 marbled with brown, beneath the epidermis verditer-green. 



LOPHYRUS, n. 



This genus was first called Uranascodon by Caup, and al- 

 tered to Uraniscodon by Boie, who has since changed it to 

 OpJmjesa. It may be divided into two sections, which will 

 probably form two genera, thus : 



1 . Head and eyebrows uniformlij scaly: palatine teeth large 

 and distinct. 



This nearly agrees with the Lophyrus of Spix, and contains 

 4 or 5 species figured by Spix, in t. 10, 12, 13 and 13 a. 



2. Head scaly with a large occipital subperforated scale,- the 

 eyebrows shielded ; the pcdatine teeth very small (or none). 



This agrees with the Agamtv of Spix. It contains the Agama 

 hispida, A. tiibeixidata, A. 7iigricollis, and A. Cychirus of Spix, 

 t. \!>, 16, 17, said to be different ages and sexes of the same 

 species; and Lophyrus ochro-collaris, Spix, t. 12. f. 2. 



This section appears by the superciliary scales to be inter- 

 mediate between the true Lophyri and the Leiocephali which 

 I have just described; and should it hereafter be found to be 

 a genus, Boie's name of Ophryesa may be used to designate it. 



The following apparently new species belongs to this sec- 

 tion. It is very nearly allied to the Agamcc in external ap- 

 pearance : I therefore propose to call it 



L. {Ophryesa.) Agamoides, n. 



Dorso 



