13C University of California Publications in Zoology [Vol. 10 



male, taken at Santa Margarita, San Luis Obispo County, June 

 3, 1911. In general dimensions and cranial proportions it is 

 nearest latimanusj in size of hands and feet it is almost exactly 

 intermediate; in color it is nearest o< rutins. On the whole, it is 

 closest to latimanus and is so labeled. But it gives strong basis 

 for belief that there is complete geographic intergradation 

 between occultus and latimanus, as indicated in the trinomial 

 form of name proposed by us. 



LITERATURE CITED 



Allen. J. A. 



1893. On a collection of mammals from the San Pedro Martir region 



of Lower California, with notes on other species, particularly 

 of the genus Sitomys. Bull. Amor. Mus. Nat. Hist., 5, 181-202. 



Bangs, O. 



1899. Descriptions of some now mammals from western North America. 

 Proc. New. Engl. Zool. Club., 1, 65—72. 



Osgood, W. H. 



19H7. Some unrecognized and misapplied names of American mammals. 

 Proc. Biol. So,-. Wash.. 20, 43-52. 



True, F. W. 



1896. A revision of the American moles. Proc. U. S. Nation. Mus., 19, 

 pp. 1-111, pis. 1-4. 



Transmitted January 31, I'M . 



