Mat, 1893.] REPTILES OF THE DEATH VALLEY EXPEDITION. 



187 



settlement been accumulated so far in any museum. Under these circum- 

 stances nothing is gained by using a trinominal. 



List of specimens of Sceloporus occidentalis. 



U.S. 

 Nat, 

 Mils. 

 No. 



Sex 

 and 



Age. 



Locality. 



Alti- 

 tude. 



Date. 



Collector. 



Remarks. 



18143 

 18144 

 18145 



18146 



d 



d 



d jirv. 



cfjuv. 



Monterey, Calif., 



..... do". '.".". '.'.'.'.. 

 do , 



Feet. 



Oct. 6 

 Oct. 3 

 Sept. 29 

 Sept. 30 



Bailey 

 ....do. 

 ....do.. 

 ....do.. 



Phrynosoma blainvillii Gray. 



That authors with only specimens of either Ph. blainvillii or Ph. corona- 

 turn before them should consider both species synonymous is perhaps not 

 to be wondered at ; but a confusion of them, with both at hand, is not so 

 easily explained. The differences are marked, numerous, and constant, 

 and moreover, are easily expressed. The two species inhabit two 

 well- separated zoological faunas, for while Ph. coronatum appears to 

 be restricted to the Cape region of Lower California — that is to say, to 

 the comparatively small mountainous area at the extreme southern end 

 of the peninsula, on which are located Cape St. Lucas, La Paz, and 

 San Jose del Cabo — Ph. blainvillii is restricted, so far as we know, to 

 Upper California. How far down the peninsula the latter species 

 descends we do not know, and whether there is any other gap between 

 the two species than the low, sandy plains to the north of the Cape re- 

 gion remains to be seen; but it is somewhat significant that Cerros 

 Island, about halfway down the peninsula, is inhabited by a third 

 species,* more nearly related to Ph. blainvillii than to Ph. coronatum. 



The title of the Californian species to the name Phrynosoma blain- 

 villii Gray is at present not entire ly beyond a suspicion. The facts in 

 the case areas follows: 



In the l Zoology of Capt. Beechey's Voyage' (published in 1839), J. 

 E. Gray (p. 96), shortly and insufficiently characterized a new species 

 of Phrynosoma from 'California' as Ph. blainvillii without stating the 

 source of the specimen or whether more than one specimen served 

 as a basis for his description. The text is accompanied by a wretched 

 figure (PL xxix, fig. 1). The description gives no clew to the identity 

 of the vspecies, but were I to go by the figure alone, I should unhe si- 



*Fhrynosoma cerroense, sp. nov. 



Diagnosis. — Nostrils excessively large, pierced in the line of canthus rostralis; 

 gular scales enlarged, in several longitudinal rows; ventral scales smooth; along 

 and slender spine between the suhlabial rictal spine and the lower end of the ear ; 

 medium occipital spine reduced to a tubercle; no row of spines between eye and 

 temporal spines ; lower peripheral spine row obsolete and only indicated by a few 

 scattered small spines. 



Habitat. — Cerros Island, Pacific coast of Lower California. 



Type— U. S. National Museum, No. 11,977; L. Belding coll. 



