1918 ] Taylor: Revision of the Rodent Genus Aplodontia 471 
Geographic Range—The northern coast district of California from 
Humboldt Bay, Carlotta, and Cuddeback along the coast in Humboldt 
and Del Norte counties northward, at least to Requa; ranging inland 
locally in Humboldt County and intergrading with A. 7. rufa in the 
vicinity of Weitzpek. 
Figs. L, M. Dorsal view of crania of Aplodontia rufa rufa and Aplodontia 
rufa humboldtiana, to illustrate different nasal outline. X 1. Fig. L, no. 13326, 
Mus. Vert. Zool., Aplodontia rufa rufa, Jackson Lake, Siskiyou County, Cali- 
fornia; fig. M, no. 21162, Mus. Vert. Zool., Aplodontia rufa humboldtiana, Car- 
lotta, Humboldt County, California. 
Cranial Characters—Skull moderate in size (see measurements 
below) ; nasal outline variable, but usually broad anteriorly, with a 
shallow embayment in lateral outline, not exceptionally compressed 
posteriorly (see text fig. M); zygomatie arches light to medium in 
