DESCRIPTION OF A NEW SPECIES OF LIZARD FROM THE ISLAND 

 SAN PEDRO MARTIR, GULF OF CALIFORNIA. 



BY 



Leonhard Steineger, 



Curator of the Department of Reptiles and Batrachians. 

 Cnemidophorus martyris, sp. nov. 



Diagnosis: Dorsal scales equal; uostril anterior to nasal suture^ 

 frontoparietals distinct; nasal not in contact with second supralabial; 

 eight longitudinal rows of ventral i^lates; femoral pores twenty; supra- 

 oculars four ; three large preanals ; caudal scales slightly oblique ; scales 

 on collar rather small, gradually decreasing in size toward the edge; 

 under side of forearm without enlarged scales; no freno-orbital ; fron- 

 tonasal wider than long ; head depressed, snout long and narrow ; color 

 above slaty black, with irregular, pale drab variolations ; head more 

 brownish, uniform; entire under side uniform blackish slaty. 



Habitat : San Pedro Martir Island, Gulf of California. 



Ty'pe : U. S. National Museum, No. 15620. Dr. Edw, Palmer coll. 



This species is quite characteristic by its coloration alone, for the com- 

 bination of the variolated upper surface with th^uniform blackish under 

 side is, I think, quite unique. There is not even a trace of a linear ar- 

 rangement of the pale markings, and what is still more remarkable even 

 the very young specimen (head and body 39 millimetres) is without 

 even the slightest indications of such a pattern. 



Description of type specimen. — Head depressed; snout narrow and 

 pointed; rostral narrow, pointed, posterior angle on top of snout long 

 and acute; nostril in lower part of nasal; frontonasal wider than long, 

 nearly straight anteriorly ; prefrontals with the anterior external angle 

 very acute and elongated ; anterior angle of frontal well forward, nearly 

 in line with anterior angle of first supraocular ; four supraoculars, the 

 posterior minute ; last three supraoculars separated from supraciliaries 

 by a row of granules; two frontoparietals; three parietals; postnasal 

 in contact with first, second, and third supralabials ; loreal large ; no sep- 

 arate freno-orbital ; central gular scales but slighly larger than the rest, 

 followed by a wide band of very minute scales which extend to the edge 

 of the collar, only the central mesoptychial scales being somewhat 

 larger; dorsal granules small, smooth; ventral plates in eight longi- 

 tudinal and about thirty-five transverse rows ; three large preanals 



Proceedings National Mnseuni, Vol. XIV— No. 863. 



407 



