4 Field Columbian Museum 



Family Eublephai'ida$. 



Coleonyx variegatus (Baird). Banded Gecko. 



One specimen of this species was secured at San Felipe, Lower 

 California. 



Family Iguaiiiclse. 



Dipsosaurus dorsalis (Baird & Girard). Crested Lizard. 



"This lizard is very common about the sand dunes in Death Val- 

 ley, where it lives in burrows beneath the stems of mesquite. It 

 is often seen on the stems of th5 mesquite, eating the foliage. 

 This lizard was very abundant in mesquite thickets at the base of the 

 Panamint Mountains. It is apparently scarce in Lower California, 

 all of the individuals seen there were taken." 



Specimens were taken in California at Furnace Creek, Mesquite 

 Valley, Ballarat, and Daggett, and in Lower California at San Felipe 

 Bay. 



Uma notata Baird. Sand Lizard. Pl.\te L 



Uma notata* Baird is based on a small specimen from the "Mojave 

 Desert." The description given by Baird is very short, and this, 

 supplemented by Cope in his work on North American Reptilesf, is 

 rather unsatisfactory. The specimens in the collection studied by me 

 agree fairly well with the above brief accounts of this species, except 

 in the number of femoral pores. The number of these vary greatly. 

 The main row has from 23 to 31, while in many specimens there is a 

 partial second row, which usually contains from i to 6 additional 

 pores. Professor Cope gives 17 or ] 8 in the type. I here append a 

 detailed description of the species, based on the material at hand, 

 and also a table of measurements. It is hoped this will aid some 

 in properly defining the species of this interesting and little -known 

 group. 



Body rather broad, depressed, its greatest width 2% to 2% in its 

 length; tail broad and depressed, the depressed arm not quite 

 reaching groin ; the depressed leg reaches beyond gular fold to ear or 

 eye; occipital plate .small, subtriangular, and separated from the 

 small plates of the .supraocular region by four or five rows of scales ; 



•Proc, Acad. Nat. Sci., Phila., 1858, 257. 

 tRep. U. S. Nat. Mus. 1898, 377. 



