CROCODILIANS, LIZARDS. AND SNAKES. 



437 



aa. Enlarged giilar scales iu'esi'iit. 

 b. Nares -withiu canthus rostralis. 



Horus shorter; tail less depressed, with coarse lateral fringe; median 



dorsal scales irregular; cross-spotted J. platyrhina Girard. 



Horns longer; tail flattened, with fine lateral fringe; median dorsal 

 scales in two parallel rows; a median brown dorsal stripe, no cross 

 hars A. maccallii Hallo well. 



The last-named three species resemble ea(;h other more nearly than 

 they do the A. modesta. They agree in having the spinous scale with 

 its basal circle above the humerus more conspicuously developed, and 

 in the enlargement of those scales of the head posterior to the parietal. 

 The lateral scales of the digits are also more elongate and i^romiuent. 

 Their femoral pores are at the margin of the large scale, the smaller 

 posterior ones forming a half rosette. In the .1. modcsta they are 

 mostly pierced within the border of the large scale, and rarely in a 

 rosette. 



ANOTA MODESTA Girard. 



Phrynosoma modealum Girard, Stausb. Expd. Gr. Salt Lake, 1852, p. .S61, pi. vi, 

 ligs. 4-8.— BocouRT, Miss. So. Mex. Kept., 1874, p. 232.— Boulexger, Cat. 

 Liz. Brit. Mas., 1885, p. 248.— Cope, Proc. Acad. Nat. Sci. Phila., 1892, p. 33.^. 



DoHosaurus modestus Girahd, 1". S. Expl. Expd., Herpet., 1858, p. 309; U. S, Mex. 

 Bound. Sur.. 1859, p. 10. 



Fi-. 78. 



ANOTA MODESTA GniARD. 



X 2.. 



Mexican boundary. 



Cat. No. !C8, U.S.N.M. 



The smallest of the species. Head broadly rounded; muzzle very 

 obtuse, the profile descending steeply from a transverse angle above 

 the nostrils. Temporal regions expanded, supporting a series of acumi- 



