CROCODILIANS, LIZARDS, AND SNAKES. 



265 



scales large, IG in a head leiigtli, ending posteriorly in an obtuse spine, 

 even tlie smaller scales above and back of tbe arms being spiny; ven- 

 tral scales smaller and smoother, but the outer posterior corner some- 

 what projecting and pointed, about 118 iscales in a line from anal open- 

 ing to gular fold; scales on limbs large, about the size of those on 

 nape, cariuated and obtusely spinose; femoral pores very large, 13 on 

 each side; scales on tail in verticils, large, about 44 in a verticil round 

 the thickest portion at base, on the u^jper surface carinatc and strongly 

 spinose behind. Color (in alcohol) ai^parently uniform brownish olive, 

 though in life they are said to be " marked with one, two, or three 

 large, rounded, or irregular grayish blotches somewhere on their body."' 

 In addition to the type si)ecimen I have before me three others nearly 

 as large, collected by Mr. Charles H, Townsend in the same locality. 

 They agree in all essential characters with the type, some of the details 

 and measurements (in millimeters) being found in the following table: 



Sauromalus hispidus. 



This enormous lizard is closely allied to the much smaller species 

 which inhabits the arid regions on the mainland to the north of the 

 Gulf of California, namely, Sanromahis atcr, with wlii(!h it has been 

 confounded, but is readily distinguished by the characters given in the 

 above diagnosis. In order to better emphasize the differences I here- 

 with give the corresponding diagnosis of the old species. 



In all probability the young of Sauromalus hls2)i<liis is much less 

 spiny than the old ones, but the scales would be much larger than in 

 corresponding specimens of JS. ater and their number consequently 

 smaller. (Stejneger.) 



• Streets, Bulletin U. S. National Museum, No. 7, p. 36. 



