150 SAURIA. 



ORIOTIARIS. 



Tympanum naked. Back and sides covered with very small scales, 

 between which larger keeled ones are scattered ; a tubercle behind the 

 superciliary edge. Dorsal crest very low, formed by a series of larger, 

 keeled, not prominent scales. Gular sac none. Tail not compressed, with 

 keeled scales below, which are almost as broad as long. 



Only one species is known. 



Oriotiaris elliotti. 



Tiaris elliotti, Gimth. Proc. Zool. Soc. 1860, p. 151. pi. 25. fig. B. 



The head is rather high, with a sharp canthus rostralis, short snout, and convex upper 

 eyelids ; it is covered with numerous slightly keeled scales, and one situated in the middle of 

 the occiput appears to be rather larger than the others ; the width of the space between the 

 bony orbits is very narrow ; the canthus rostralis and the margin of the upper eyelid form 

 one continuous sharp edge. The rostral shield is very low, like the upper labials, which are 

 five in number. The nostril is very small, in a single shield, which is situated between the 

 canthus rostralis and the first labial. The loreal region is a little concave, and covered with 

 small irregular shields. The median shield of the lower jaw is sub triangular and longer 

 than broad; there are five lower labials on each side, the remainder of the throat being 

 covered with imbricate and keeled scales. There is a small conical tubercle behind, and 

 detached from, the orbital edge ; and another similar tubercle on each side of the throat below 

 the tympanum ; a series of tubercles proceeds from above the tympanum, and is bent inwards 

 to the nuchal ridge. The tympanum itself is small and subcircular. There is no fold across 

 the throat, but a transverse band of rather smaller scales. 



The trunk is rounded, in the female depressed ; a series of larger, keeled scales mns along 

 the middle of the neck and back to the base of the tail, and forms a sort of dorsal crest ; 

 the back and the sides are covered with small scales of unequal size and quite irregularly 

 arranged ; they are intermixed with scattered, considerably larger scales, which are dis- 

 tinctly keeled. The scales of the belly are imbricate, rhombic, more equal in size and more 

 regularly arranged and slightly keeled ; the praeanal are like those of the belly ; prteanal 

 pores none. 



The tail is very long, slender, rounded at the base, and covered on all sides with rhombic, 

 keeled, imbricate scales ; it is not verticillated. 



The upper parts of the extremities are covered with very large and strongly keeled scales ; 

 some scales on the hinder side of the femur have even two or three keels. The fore leg 



