1922] Schmidt, Amphibians and Reptiles of Lower California ()67 



RANGE. — Known only from the type locality. 



Type. — U. S. N. M. No. 37585; 9 ; > s :m Quintan, Lower California; E. \Y. Nel- 

 son and A. E. Goldman; August 15, 1905. (Biological Survey Collection.) 



Description of Type. — Habitus stout, apparently wider in proportion to length 

 than P. blainvillii; tail round; tympanum nearly concealed by the folds of the neck; 

 nostril just below the canthus rostralis; superciliary region expanded; a series of 

 four temporal spines, the last largest and nearly equalling the occipital; two strong 

 occipital spines with a smaller median spine nearly in line with them; all somewhat 

 grooved basally; scales of front very rugose, much smaller than in b. blainvillii, larger 

 than those of b. jrontale; no connecting ridge between the superciliary angles; a 

 transverse series of four conical spines in front of the occipitals; six infralabials, the 

 fifth largest, the last (very small) beneath the anterior side of the subrictal; a strong 

 subrictal above the line of the infralabial spines, followed by a smaller, pointed spine 

 (the postrictal) in the line of the infralabials; two lateral groups of spines on the neck; 

 three rows of enlarged gulars on each side; eight or ten irregular rows of large keeled 

 scales on the back, continuing as a lateral and a dorsolateral series on the tail; verte- 

 bral line covered with enlarged, flat, keeled scales; strong spinose scales on the 

 thighs, two well-marked series of elongate lateral scales forming a double marginal 

 fringe; ventral scales flat, smooth; femoral pores 15-16. 



Grayish above, with four pairs of obscure transverse brown blotches on the back, 

 corresponding in position to the larger of the enlarged dorsal scales; two brown 

 crossbands on base of tail; venter grayish, spotted with brown posteriorly. 



Measurements of Type. — Total length, 127 mm. ; body, 87 mm.; tail, 40 mm.; 

 foreleg, 38 mm.; hind leg, 51 mm.; snout to tip of temporal horn, 29 mm.; greatest 

 width of head (between tips of third temporal horns), 31 mm. 



Notes on Paratypes. — The smaller male paratype, U. S. N. M. No. 37584, 

 from the same locality, has a narrower body, and only five infralabials, but agrees in 

 essential characters with the type. A third specimen in the series before me, Field 

 Museum No. 1127, a female, recorded by Meek as P. coronatum (loc. cit), thus 

 recognizing its distinctness from P. blainvillii, has the tympanum completely con- 

 cealed by the neck folds. The measurements of the two paratypes are as follows: 



Number 



Total Length 

 Length of Body 

 Length of Tail 

 Length of Foreleg 

 Length of Hind Leg 

 Greatest Width of Head 



I have no doubt that this species is fully distinct from P. blainvillii 

 blainvillii, which is unquestionably the most closely allied species. Its 

 relationship with P. blainvillii jrontale, shown in the rugosity of the 

 frontal scales, appears to be closer than with the typical subspecies, 

 although the range of the latter is inserted between that of nelsoni and 

 frontale. From jrontale it is distinguished by the larger frontal scales and 

 the keeled scales of the vertebral line. Phrynosoma coronatum has much 



