124 University of California Publications in Zoology [ Vou. 17 
Novres ON THE DISTRIBUTION OF WESTERN FROGS 
Rana pretiosa pretiosa is known from nearly throughout Wash- 
ington and Oregon, north into Canada, east into Montana, Wyoming, 
and northern Utah, and south into extreme northern California. 
Rana pretiosa luteiventris, a form recently described by Thompson 
(1913, pp. 538-55) from Humboldt and Maggie valleys, Eureka and 
Elko counties, Nevada, seems to be represented in the Museum of 
Vertebrate Zoology by two specimens (nos. 2098, 2099), collected by 
Dr. H. C. Bryant at Alturas, Modoe County, California. 
Rana aurora aurora, described from Puget Sound, is known to the 
present writer from the Willamette Valley, Oregon, and from Eureka, 
Humboldt County, California, on the basis of specimens in the Museum 
of Vertebrate Zoology. Specimens from Mendocino City, on the coast 
of Mendocino County, California, are intergrades between aurora and 
draytonn. 
Rana aurora draytonii ranges north from the San Pedro Martir 
Mountains, in Lower California, to Gualala, Mendocino County, Cali- 
fornia (as indieated by material in the Museum of Vertebrate Zoology ), 
and east from the coast to the foothills of the Sierra Nevada and into 
the mountains of southern California up to an altitude of 4000 feet. 
Transmitted October 28, 1916. 
