418 



REPORT OF NATIONAL MUSEUM, 1S9S. 



trils i)ierced at the anterior extremity by the superciliary ridge; auric- 

 ular cavity bordered in front by granular scales; occipital plate dis- 

 tinct, as large as one of the two tubercles which border the posterior 

 edge; sixteen to twenty pores on the inner x^art of the thigh; tail two- 

 fifths the total length of the animal, characterized in the male by a 

 thick base and by two rather large scales in the postanal region; two 

 or three scales similar in shape beneath each arm; length of tibia not 

 equal to the distance from the end of the snout to the beginning of the 

 occipital spines; scales of the belly, neck, and chest, and those under- 

 neath the tail smooth. 



I'ig. 72. 



PHKYNOSOMA ORBICULAEE VAR. TYPICUM WiEGMANN. 



X 1.5. 



Jalapa, Mexico. 



Cat. No. 4596, U.S.N.M. 



General color sienna brown. On the neck and back, on each side of 

 the vertebral line, are four transverse brown or black spots outlined 

 with yellow; tail and limbs crossed likewise by brown bands. Under- 

 side covered with confluent black spots on a yellowish-white ground 

 color. (Bocourt.) 



Bocourt distinguishes three varieties of this lizard, which differ as 

 follows : 



Occipital horn.s longer than temporal; occipital scales large P. orUculareUjpicim. 



Occipital horns shorter than longest temporal ; occipital scales large. 



r. orhicnlare var. A. 

 Occipital horns shorter than longest temporal ; occipital scales smaller, numerons. 



P. orhicnlare var. B. 



