Mat, 1893.] BATRACHIANS OF THE DEATH VALLEY EXPEDITION. 221 



ences, for while we find B. halophilus alone in the valley of California, 

 both species were collected in the same localities east of the Sierra 

 Nevada. 



The name of this form is selected in honor of Mr. E. W. Nelson for 

 his valuable zoogeographical work both in the extreme south and in 

 the extreme north of our country. 



List of specimens of Bufo boreas nelsoni. 



U.S. 





Nat- 



Sex and 



Mus. 



age. 



No. 





18738 



ad. 



18739 



ad. 



18740 



ad. 



18741 



ad. 



18742 



ad. 



18743 



ad. 



18744 



adol. 



18745 



jun. 



18746 



ad. 



18747 



ad. 



Locality. 



Oasis Valley, Nev 



do 



do 



do 



do 



do 



Resting Springs, Calif 



do 



Owens Valley, Morans, Calif. .. 

 Owens Valley, Lone Pine, Calif- 



Alti- 

 tude. 



Feet. 



5, 000 



Mar. 16 

 ....do ... 

 . . . do . . . 

 ....do ... 

 . ...do ... 

 . ...do ... 

 Feb. 7 

 ....do ... 

 July. 4 

 June 18 



Collector. 



Stephens.. 



...do 



....do 



...do 



...do 



Nelson 



Fisher 



....do 



Stephens.. 

 IS elson 



Remarks. 



Type. 



Bufo lentiginosus woodhousii (Gir.). 



The three specimens mentioned below are rather young, and are re- 

 ferred to under the above name more because they occur in the region 

 commonly assigned to this form than because they conform to the char- 

 acters ascribed to it. As a matter of fact, I have yet to discover a char- 

 acter, or a combination of characters of sufficient stability to enable me 

 to distinguish B. woodhousii from B. americanus. Proportions, parallel- 

 ism or divergence of cranial ridges, and single or double subarticular 

 tubercles on the toes, seem all entirely valueless as characters. 



[Specimens of this toad were collected in Pahranagat and Vegas 

 valleys, Nevada; and toads, probably the same species, were common 

 in the Lower Muddy and Virgin valleys, Nevada, and at the mouth of 

 Beverdam Creek, Arizona. — C. H. M.] 



List of specimens of Bufo lentiginosus woodhousii. 



U.S. 





Nat. 



Sex and 



Mus. 



age. 



No. 





1S716 



jun. 



18717 



jun. 



18718 



jun. 



Locality. 



Pahranagat Valley, Nov 

 Vegas Valley, Nev 



Alti- 

 tude. 



Feet. 



Date. 



May 25 

 Mar. 13 

 Mar. 14 



Collector. 



Bailey 

 Nelson 

 Bailey 



Remarks. 



