DESCRIPTION OF A NEW NORTH AMERICAN LIZARD OF THE 



GENUS SAUROMALUS. 



BY 



Leonhard Stejneger. 



Curator of the Department of Reptiles and Batrachians. 

 Sauromalus hispidus, sp. nov. 



Diagnosis. — Nuchal scales spiny, the larger ones almost as large as 

 the largest preauricular spines ; dorsal scales ending posteriorly in a 

 long, obtuse spine; dorsal scale rows average 16 to a head length; 

 number of ventral scale rows from gular fold to anus averages 118; 

 number of scales around thickest part of tail averages 50 ; femoral pores 

 12 to 15; size very large : total length of four specimens averages 510 

 millimetres. 



Habitat. — Angel de la Guardia Island, Gulf of California. 



Tyjje.—U. S. :N^ational Museum Xo. 8563. Dr. Thos. H. Streets coll. 



Synonymy. 



1877.— Sauromalus ater Streets, Bull. U. S. Nat. Mus., No. 7, p. 36 {nee Dum^ril), 

 TowxSEXD, Proc. U. S. Nat. Mus., xiil (No. 800) 1890, p. 144. 



Description of type specimen. — Habit very stout, head depressed, body 

 less so ; nostrils large, tubular, opening upwards and outwards ; upper 

 head-scales large, considerably larger than the supraoculars, those of 

 the parietal region largest, tubercular, some nearly conical ; three series 

 of strong conical scales in front of ear; several series of large conical 

 tubercles on side of basal half of mandible ; neck above very rough, 

 covered with large but obtuse spines, most of them fully as large as 

 the anteauricular denticulation, and descending on the postauricular 

 fold, sending a strong branch forward, nearly connecting with the 

 mandibular spines ; dorsal scales large, 16 in a head length, ending 

 posteriorly in an obtuse spine, even the smaller scales above and back 

 of the arms being spiny; ventral scales smaller and smoother, but the 

 outer posterior corner somewhat projecting and pointed, about 118 scales 

 in a line from anal opening to gular fold ; scales on limbs large, about 

 the size of those on nape, carinated and obtusely spinose ; femoral 

 pores very large, 13 on each side; scales on tail in verticils, large, 

 about ll in a verticil round the thickest portion at base, on the 



Proceedings National Museum, Vol. XIV — No. 864. 



409 



