320 REPORT OF NATIONAL MUSEUM, 1898. 



aud limbs are dotted with well-defined blue spots, most abundant along 

 tbe back. There are blue bands on the sides aud blue spots on the 

 back of such portion of the tail as still remains. The whole under 

 surface of the head is blue; darkest on the point of the chin. The 

 sides of the belly (and even the central portion) are dusky bluish, the 

 blue deepest anteriorly; the whole under part with light bluish spots. 

 The remaining under parts are of a dark pepper and salt mixture. 



Although not much reliance can be placed on the rostral plates as 

 furnishing characters, yet in the single specimen of the present species 

 there are but four in the series behind the internasals, instead of the 

 five or six on the others. The occipital plates on each side the median 

 one are much larger than usual. The head is elongated and narrow, 

 but nearly or quite as deep a-s wide, differing in its narrowness from 

 ornata and in its depth from graciosa. The dorsal scales are unusually 

 large; they agree with U. symmetrica in the distinctness of the series 

 on each side, inclosing smaller ones between, but are considerably 

 larger. 



The colors are much darker than in others, and the light blue spots 

 above and on sides of tail appear peculiar to it. 



I have been unable to find the typical specimen of this species, and 

 the above description is taken from Professor Baird's manuscript. No 

 other specimens have been correctly identified with it, those given in 

 Yarrow's check list being the U. stansburiana. 



UTA BICARINATA Dumeril. 



Uta bicarinata Cope, Proc. Acad. Nat. Sci. Phila., 1864, p. 177. 



Phymatolepis Mcarinatus A. Dumeuil, Arch. Mus., VIII, 1856, p. 549, pi. xxiii, fig. 

 2. — BocouRT, Miss. Sci. Mex., Kept., 1874, p. 165, pi. xvii bis, fig. 9. 



Back with two series of large carinated scales, forming on each side 

 of the vertebral line a slightly raised keel, which begins at a level 

 with the shoulders and is i)rolonged on the tail. Irregular black spots, 

 longer than broad, are scattered over the body, which form, on a ground 

 of a greenish-yellow, a partial collar on the neck, and on the tail nar- 

 row half-rings, regularly spaced. Legs and toes crossed by spots of 

 the same color. 



Trunk slightly depressed; limbs feeble, especially the front ones. 

 Tail rather long and robust. Head small, muzzle short, pointed, and 

 flat; nostrils round, each opened in a plate of similar shape and slightly 

 projecting; rostral plate triangular, a little raised, but equaling in size 

 the space comprised between the external borders of the nostrils; two 

 pairs of internasal scales; prefrontal region with scaly sheets, rather 

 large and polygonal; frontal plate pentagonal, slightly wider in front 

 than behind, in contact at the posterior edge with the two fronto- 

 parietals which border the interparietal in front; this latter is quite 

 wide, rather broader than long, equaling in breadth one-third the length 

 of the head; it is bordered on each side by two parietals, and posteri- 



