1922] 



Schmidt, Amphibians and Reptile* of Lower California 



645 



Key to the Species of the Genus Sauromalus 



Nuchals distinctly spinose .' . . 2. 



Nuchals not distinctly spinose 3. 



Largest nuchals about equal to auricular spines; dorsal scales in head length, 16. 



S. hispidus. 

 Largest nuchals about one-half the length of auricular spines; dorsal scales in 



head length, 28 S. townsendi. 



Ventral scales from gular fold to anus more than 155 S. obesus. 



Ventral scales from gular fold to anus less than 155 4. 



Dorsal scales in head length 26-32; adult size under 400 mm S. ater. 



Dorsal scales in head length 35-41 ; adult size over 500 mm S. varius. 



Callisaurus crinitus Cope 

 Plate LI, Figure 1 ; Plate LII, Figures 1 and 3 

 CaMsaurus crinitus Cope, 1896a, p. 1049; Stejneger and Barbour, 1917, p. 47. 



Range. — Balenas Bay and San Bartolome Bay, Pacific Coast of Lower Cali- 

 fornia, to the Magdalena Plain. 



Lower Californian Records. — Balenas Bay, Cope, 1889, p. 147. 



This exceptionally interesting species was taken by the Albatross 

 Expedition at Abreojos Point (A. M. N. H. No. 5390), not far from the 

 type locality, and at San Bartolome Bay, some distance to the north 

 (A. M. N. H. Nos. 5369-71, 5501-2, 5504, U. S. N. M. No. 64530). 



In the series at hand, one male (U. S. N. M. No. 64530) has three 

 lateroventral bars on both sides, followed by a large and distinct spot on 

 one side, which is less distinct on the other side; two males (A. M. N. H. 

 Nos. 5371, 5502) have three bars on each side, the posterior ones being 

 prolonged caudad from its ventral angles; in A. M. N. H. No. 5501, 

 there are three bars followed, by a spot on ore side, while on the other 

 side the middle bar forks slightly below the lateral fold, so that there 

 appears to be four bars followed by a spot; in A. M. N. H. No. 5369, 

 the middle bar forks in the other direction, i.e., it is single ventrally 

 and divides on the side. The latter condition appears in A. M. N. H. 

 Nos. 5502 and 5371, but the division is concealed by the lateral fold. 



