﻿366 3. JGUANID.-E 



it showed signs of renewed energy and was ready to run at 

 anyone's approach." 



Synopsis of Species and Subspecies 

 a. — Nostrils opening on or almost on the lines joining the 

 supraorbital ridges with the end of the snout, 

 b. — Gular scales small, nearly equal-sized or with one 

 row on each side enlarged j a series of enlarged 

 scales below, but not very much larger than, the 

 lower labials j occipital spines very short or absent } 

 peripheral fringe of one series of spinose scales. 

 c. — Ventral scales smooth j no prominent ridge from 

 tip of postorbital boss to outer enlarged temporals} 

 lower jaw not enormously developed posteriorly} 

 one to three rows of smooth scales between infrala- 

 bials and enlarged sublabials. 

 d. — Head-spines smaller} occipitals usually nearly 

 erect, 

 e.— Size smaller; head spines very rudimentary; 

 temporal spines erect like occipitals, not pointing 

 posteriorly. p ^ douglassii.-p. 368. 



e\ — Size larger} head spines a little larger; temporal 

 spines less erect, not parallel to occipitals. 



P. d\ ornatissimum. — p. 377. 

 d\ — Head-spines larger; occipitals usually directed 

 backward, nearly parallel with temporals; tem- 

 poral spines often reddish. 



P. <f. hernandesi. — p. 382. 

 c\ — Ventral scales strongly keeled; a prominent ridge 

 from tip of postorbital boss to outer enlarged tem- 

 porals; lower jaw enormously enlarged posteriorly; 

 five to seven rows of keeled scales between infra- 

 labials and enlarged sublabials. 



P. ditmarsi. — p. 386. 



