﻿Dec, 1895.] 



SOREX BAIRDI. 



77 



from Takutat. The Yakutat speciiiieDS were collected in July; the 

 Juneau series about the middle of August. It is probable that com- 

 plete inter gradation exists between alasverms and longicauda. 



SOREX OREOPOLUS Merriam. 

 (PI. VIII, figs. 4, 4a.) 

 Sorex oreopolus Merriam, Proc. Biol. Soc. Washington, VII, 173, September 29, 1892. 



Type locality.— l^orth slope Sierra Nevada de Colima, Jalisco, Mexico 

 (altitude, 10,000 feet). 



General characters— ^ize medium j tail and ears short; hind foot, 

 13 mm. Similar to 8. obscurus, but tail much shorter ; color much darker 

 above and below; skull very much longer and more slender. 



Color. — Upper parts finely mixed sepia brown and dusky, without 

 chestnut tinge; under parts drab; tail bicolor: dusky above and all 

 round at tip, soiled whitish beneath. 



Cranial and dental characters. — Skull similar to those of S. ohscurus 

 and ventralis, but much longer and more slender, with brain case and 

 constriction between brain case and rostrum especially elongated, and 

 palate narrower. The second ujDper molar is narrower (inner side 

 shorter) than in ventralis. 



Measurements. — Average of 3 specimens from type locality: Total 

 length, 104.7 mm.; tail vertebrae, 36.3 mm.; hind foot, 13.7 mm. 



General remarks. — Sorex oreopolus has apparently the most restricted 

 distribution of any Mexican Sorex, being known only from the Sierra 

 Nevada de Oolima, Jalisco. It belongs to the S. ohscurus group, and is 

 represented in the mountains of Oaxaca by a closely related form, 

 S. ohscurus ventralis, from which it may be distinguished by its much 

 paler under parts, the absence of chestnut tinge from the sides and 

 back, and the very much longer and more slender skull, as already 

 pointed out. 



Specimens examined. — Total number, 3 ; all from the type locality. 



SOREX BAIRDI sp. uov. 

 (PI. VII, figs. 3, 3a.) 



Type from Astoria, Oregon. Type, No. Mlrl^ 9 ad., U. S. Nat. Mus., Department of 

 Agriculture collection. Collected August 2, 1889, by T. S. Palmer. Orig. No. 270. 



Geographic distrihution. — Coast of Oregon at mouth of Columbia 

 River. 



General characters. — Size, rather large; tail long; color dull brown- 

 ish chestnut; external appearance as in S. longicauda, but skull larger 

 and anterior unicuspids much more swollen. 



Color. — Upper parts dull, dark chestnut brown; under parts dull 

 chestnut brown (similar to back, but lacking the admixture of black- 

 tipped hairs); tail bicolor: dark brown, almost dusky-above; flesh 

 color, or pale buffy brownish, below. 



