1 02 RE VISION OF A M ERIC AN MOLES— TE FE. vol. xix. 



All the mandibular teeth to the last premolar with oblique crowns. 

 Crowns of the three incisors broad, decreasing in size from the first to 

 the third. Canine similar to the third incisor, but smaller, and with a 

 posterior basal tubercle. First iHcmolar large and thicker and less 

 oblique. Second premolar very much larger and more massive; nearly 

 conical, but with a posterior basal prolongation. Molars W-shaped in 

 transverse section, longer than broad; the first and second subequal 

 aud the third one-third smaller. 



GEOGRAPHICAL DISTRIBUTION. 



I have examined in all 51 specimens of this mole. These specimens 

 are from widely remote localities, and I am disposed to think that they 

 indicate fairly well the ju-eseut range of the species, except that there 

 is likely to be a further southward extension in the Sierra Nevadas. 



The type of the species was from the White Elver Pass, north of 

 Mount Rainier, Washington, and there is another specimen in the 

 National Museum from Simiahmoo in the same State, and 34 speci- 

 mens from Sumas, British Columbia, on the south side of the Eraser 

 River (long. 122° W.). 



In the Department of Agriculture collection are eight specimens 

 from Washington, two from Steilacooni, four from Lake Cushman, in 

 the northwest part of Mason County, on the Skokomish River; one 

 from Tenino, and one from Seattle. The National Museum has one 

 specimen from Elkhead, Douglas County, Oregon, and the Department 

 of Agriculture one from Siskiyou in that State. The remainder of the 

 specimens are from northern California ; one from Crescent City (D. A.) ; 

 three from Carberry's Ranch (D. A.), which is on the summit of the 

 Sierra Nevada Mountains, about 50 miles east of Redding; two from 

 Nicasio, Marin County (1 D. A., 1 A. M.). 



Lord met with the species in British Columbia on the Sumas (or 

 Chilliwack) prairies on the west side of the Cascade Mountains, near 

 the Fraser River, ])robably on the identical spot from which the large 

 series in the National Museum was obtained.' 



Dobson includes Texas in the range of the species,' but on what 

 grounds 1 do not know. 



From present evidence it would appear that the range of Xeiirotri 

 chns covers an area on the Pacific Coast of North America west of 

 the Cascade aud Sierra Nevada Mountains, extending from the Fraser 

 River in British Columbia, immediately north of the boundary of the 

 United States, to San Francisco Bay. At two points, namely, at the 



'Proc. Zool. Soc. Loudou, 1864, 161. "The first and only place iu which I ever 

 met this stranj^e litth' fellow was on the [Chilliwack] prairies. These large urassy 

 openinus or prairies are sitnatetl near the Fraser River, on the western side of the 

 Cascade Monntains." (Lord, Natnralist in British Columbia, I, 1866, p. 341, with a 

 plate.) 



^Monogr. Insectivora, 1883, p. 143. 



