Plate LIV 



Fig. 1. Phrynosoma coronatum Blainville, IT. S. N. M. Xo. 64465. 



Fig.. 2. Phrynosoma blainvUlii hlainvillii Gray, Field Mus. Xo. 1074, Trinidad, 

 Lower California. 



Fig. 3. Phrynosoma nelson i, new species, paratype, Field Mus. Xo. 1127, San 

 Quintin, Lower California. 



To show the character of the frontal scales. 



