1918 ] Taylor: Revision of the Rodent Genus Aplodontia 467 
Remarks.—Comparisons of examples of Aplodontia rufa rainicri 
from the type locality and A. r. columbiana from the head of the 
Cascade River, Washington, with specimens of A. r. rufa from the 
Puget Sound district (Kirkland, Seattle, Chilliwack, Sumas), and 
then with examples from localities more or less intermediate geograph- 
ically and altitudinally, as Sauk and Easton, Washington, demonstrate 
beyond a doubt that intergradation takes place between A. r. rufa 
and the rainieri-columbiana series. A gradual change is indicated 
from the lowland rufa type to the mountain rainieri-columbiana type 
in size, in general cranial characters, and, particularly, in the dimen- 
sions and outline of the nasal bones and the size and outline of the 
external auditory meatus. More abundant material would doubtless 
supply more complete evidence for intergradation. 
A. r. rainieri tends to be grayer than A. r. rufa, decidedly grayer 
than in the typical form, and to have less brown beneath. The nasals 
in rainiert tend to be broader posteriorly, and the caliber of the audital 
tubes tends to be less. 
Aplodontia rufa pacifica Merriam 
Pacific Aplodontia 
Aplodontia pacifica Merriam (1899a), p. 19. 
Haplodontia pacifica, Elliot (1901), p. 114. 
Type—Female adult, skull and skin; no. 77372, U. S. Nat. Mus., 
Biol. Surv. Coll.; Newport, mouth of Yaquina Bay, Oregon; March 
20, 1896; collected by B. J. Bretherton; orig. no. 2219. 
Specimens Examined.—A total of 46, from the following localities : 
Oregon: Clatsop County—Astoria, 2; Mishawaka, 1 (skin only). Tillamook 
County—Wilson River, MeNamer’s Camp, 1. Lincoln County—Newport, 8. 
Lane County—Florence, 7; Mercer, 3; Eugene, 1; Spencer Butte, 4; Seaton, 3; 
Mapleton, 3. Douglas County—Smith River, 2; Gardiner, 4. Coos County 
Coquille, 3 (1 skull only); ‘‘Coos County,’’ 1. Curry County—Agness, 1; Port 
Orford, 1 (skull only). Josephine County—Briggs Creek (alt. 3000 ft.), 13 
miles southwest of Galice, 1. 
Geographic Range.—Coast of Oregon, from Astoria on the north 
at least to Port Orford on the south; ranging inland locally, as in 
the vicinity of Eugene, Oregon, and gradually intergrading with 
Aplodontia rufa rufa, probably in a broad belt centrally on the Pacific 
slope of Oregon from the northern to the southern boundaries of the 
state. 
