308 REPORT OF NATIONAL MUSEUM, 1898. 



nearly trausverse but slightly oblique series, and considerably larger 

 than those on the back. The scales on the tail are verticillate, strongly 

 carinated except below, and abruptly much larger than those on the 

 rump or back. The scales on the thigh are about equal except on the ' 

 posterior surface, where they become abruptly smaller. They diminish 

 very gradually below from the anterior edge to the femoral pores. All 

 the scales on the legs are strongly carinate, except on the inferior sur- 

 faces. There are fifteen femoral pores. 



The plates of the head are quite regularly arranged and large, some- 

 what as in Sceloporus. There is a large occipital encircled laterally and 

 behind by one or two series of plates which are larger than those on 

 the nape. It is separated an tero- laterally from the supraorbital region 

 by two plates on each side, the anterior in contact or separated by a very 

 small median one. These are in contact with a single interorbital ver- 

 tical, followed by another. 



The arrangement beginning with the verticils is I, 1, 3, 3, 3, 2, and 

 4 internasals. The third set of 3 sometimes has the median divided 

 transversely, and there is usually an additional very small exterior 

 plate. The nostrils are superior, large, and rounded ; in one plate with 

 narrow margin and surrounded, except externally, by small ones. All 

 these plates are somewhat depressed, pyramidal, or raised in the 

 middle, sometimes conspicuously so, but they are not wrinkled. The 

 sui)raorbital region shows an inner series of small plates, then a series 

 of large transverse smooth plates with a smaller one in its concavity; 

 exterior to these are two series of very small plates and the anterior 

 extremity of the supraorbits is filled with a confused mixture of the 

 same. The loral region is filled with three or four large angular plates; 

 the upper labials are five or six, long and narrow, not conspicuously 

 imbricated, and rounded externally; they are bordered above by one 

 series of plates, above which is a second shorter one. The lower labials 

 are very similar to the upper, and bordered internally behind by three 

 rows of plates mucii larger than those on the chin, the innermost alone 

 running forward to the mental plate, and much larger than the rest. 

 The remaining plates on the chin are rounded and larger than those on 

 the back. The cheeks are covered with tubercles as large as the dor- 

 sal scales; there are six or seven much larger behind, where they are 

 separated by a few small ones from the ear. This is small, rounded, 

 and i)artly covered by a series of two or three long-pointed triangular 

 scales on the anterior border. The limbs are short and stout; the hind 

 foot about one-third the head and body, the claws very short and blunt. 

 Tlie tail is rather longer than the body, tapering gently throughout; 

 depressed to near the end, which is cylindrical and much attenuated. 



The general color above and on the sides is a dark, greenish-olive, 

 varied with small blue spots on single scales, and with larger black 

 dots interspersed more sparsely. There is in reality a serial arrange- 

 ment of two rows of U-shaped dark blotches on the back, punctate 



