266 BULLETIN 33, UNITED STATES NATIONAL MUSEUM. 



this point, and forming a regular curve with the i^ostorbital ridge. No 

 braucli crests. A very short robust supratynipanic crest, a short narrow 

 precrbital crest. Tympanic disk large, round, its diameter three-fourths 

 the length of the eye-fissure. Tongue elongate-obo vate ; truncate poste- 

 riorly. Border of eyelids thickened, presenting an angle at each ex- 

 tremity, anterior and posterior. 





Fig. 62. Bitfo alvarius. No. 2572. Fort Yuma, Cal. ; J. 



Measurements. 



M. 



Length of head and bofly 165 



Length of head including tympana 036 



Width of head, iuchiding tympana 060 



Length of fore Jimb from axilla 078 



Length of fore-foot 034 



Length of hind leg 051 



Length of tibia 053 



Length of tarsus 033 



Length of rest of foot •. „ .053 



Parotoid gland a long oval, with parallel sides, descending from the 

 usual commencement above the tympanum to a position above the pos- 

 terior edge of the humerus, and nearly on a level with the posterior 

 border of the memhranum tympani. Dorsal integument with rather 

 sparse small tubercles. A huge oval gland on the superior face of the 



