674 Bulletin American Museum of Natural History [Vol. XL VI 



In the variation of the antebrachials and of the second labial, these 

 specimens show an approach to C. labialis Stejneger, which is amply- 

 distinguished, however, by other characters (single posterior anal plate, 

 low number of femoral pores and coloration) . I believe that C. bartolomas 

 is directly related to C. tessellatus stejnegeri, and that it is derived from 

 that form. It seems amply distinct in the character of the throat scales 

 described in the key. C. multiscutatus is somewhat less distinct from C. 

 tessellatus stejnegeri in coloration and in other characters than C. bartolo- 

 mas. It is evident that for an adequate revision of the Lower Cali- 

 fornian Cnemidophorus much additional material is needed. 



Fig. 11. Variation in the labials of Cnemidophorus bartolomas Dickerson. A, Type, U. S. N. M. 

 No. 64448, left side, nasal in contact with second labial ; B, same specimen, right side (reversed in figure) 

 nasal not in contact with second labial; C, A. M. N. H. No. 5507, and D, A. M. N. H. No. 5522, showing 

 different degrees of separation of nasal and second labial. 



Cnemidophorus multiscutatus Cope 



Cnemidophorus tessellatus multiscutatus Cope, 1892a, p. 38. 

 Cnemidophorus multiscutatus Stejneger and Barbour, 1917, p. 66. 

 Range. — Cedros Island, off the Pacific Coast of Lower California. 



Three specimens (A. M. N. H. Nos. 5505-6, U. S. N. M. No. 64462) 

 were collected on Cedros Island by the Albatross Expedition. They do 

 not differ in any important respect from the description of Cope (1900, 

 p. 586). 



Cnemidophorus rubidus Cope 



Cnemidophorus tessellatus rubidus Cope, 1892a, p. 36, PI. xn, fig./. 

 Cnemidophorus rubidus Stejneger and Barbour, 1917, p. 67. 



Range. — Santa Margarita and Magdalena Islands, Pacific coast of Lower Cali- 

 fornia. 



Lower Californian Records. — Santa Margarita Island, Cope, 1892a, p. 36; 

 Magdalena Island, Comondu, Van Denburgh, 1895, p. 126. 



A single specimen of this species was collected by the Albatross 

 Expedition on Santa Margarita Island (U. S. N. M. No. 64463). 



Cnemidophorus labialis Stejneger 

 Cnemidophorus labialis Stejneger 1890, p. 643; Stejneger and Barbour, 1917, 

 p. 66. 

 Range. — Confined to Cedros Island. 



