1915.] 



SCAPANUS OEAEIUS OEARIUS. 



61 



mandible, and a minute extra tooth between the third and fourth 

 right lower premolars. This is interesting since Scapanus normally 

 has the theoretically complete mammalian dentition of 44 teeth. 

 Specimens examined. — ^Total number, 203, as follows: 



California: Cresent City, 6; Femdale, 11;^ Smith River, 2. 



Oregon: Beaverton, 3; Coquille, 1; Drain, 1; Goldbeach, 2; Grants Pass, 1; 

 Netarts, l;^ Oregon City, 3; Portland, 24; 2,3,4 Salem,3; Seaton, 1; "U.S. 

 Exploring Expedition," 1; Wells, 1. 



Washington: Columbia River (tj^e locality), 1;^ Hot Springs Trail, Olympic 

 Mountains, 1;^ Lake Cushman, 2; La Push, 1; Puyallup, 108;^ Ronton, 

 1;^ Roy, 1; Sauk, 1; Seattle, 1; Skykomish, 1; South Bend, 5; Steilacoom, 

 3; Tacoma, 1;^ Tenino, 3; Vancouver, 11; Vancouver Barracks (probably 

 exact type locality), 1. 



SCAPANUS ORARIUS ORARIUS True. 

 Coast Mole, 

 (Pi. IV, fig. 2; PI. V, figs. 2, 2a; PL VI, fig. 11.) 

 Scapanus orarius True, Proc. U. S. Nat. Mus., vol. 19, p. 52, December 21, 1896. 



Type locality. — Shoalwater Bay, Pacific County, Washington. 



Type specimen. — No. U. S. Nat. Mus. ; $ young adult, skin 



and skull (posterior portion of braincase broken and incomplete); 

 collected August 30, 1855, by J. G. Cooper. 



Geographic range. — Humid coast region of northern California 

 (north of Mendocino), Oregon, and Washington. 



General characters. — Size medium; color dark. The subspecies 

 orarius is somewhat smaller than S. I. latimanus, with relatively smaller 

 fore feet, and slenderer claws; darker than latim/inus. Similar in 

 color to 8. townsendii, but very much smaller, with actually and rela- 

 tively smaller feet and claws. The skull of S. o. orarius can always 

 be easily distinguished from that of townsendii by its much smaller 

 size, without reference to any other characters; from that of latimanus 

 it differs in its evenly spaced and uncrowded unicuspid teeth, its very 

 narrow^ rostrum, undeveloped and indistinct sublachrymal-maxillary 

 ridge, and very weak mandible; teeth, particularly the first incisors, 

 smaller than in latimanus. 



Color. — General tone much the same as in yS'. toionsendii. Winter 

 pelage: Upperparts fuscous-black, chgstura black, blackish brown, to 

 nearly black; underparts sUghtly paler and more grayish. Summer 

 pelage: Much like winter pelage but usually more brownish. 



Skull. — Size medium (average greatest length of skulls of adult 

 males about 34 to 35 mm.); mastoid region weak; sublachrymal- 

 maxillary ridge only slightly developed; rostrum very narrow; 



1 Collection Mus. Vert. Zool., Univ. California. 



2 Collection Oregon State Game Comm. 



3 Collection of H. E. Anthony, New York City. 

 * Collection of S. G. Jewett, Portland, Oreg. 



5 Collection Acad. Nat. Sci. Philadelphia. 



8 Collection Field Mus. Nat. Hist. 



^ One hundred, skulls only; two skeletons. 



