Jackson — Two New Shrews from Oregon. 129 



and olive-brown, paling very slightly on the sides and grading into color 

 of underparts; underparts slightly paler than back, usually between 

 buffy brown and tawny-olive, sometimes tending toward avellaneous; tail 

 scarcely bicolor; above about same color as back, becoming very slightly 

 paler below. 



Skull. — Large for the species obscurus, somewhat smaller than that of 

 Sorex obscurus bairdi, slightly larger than that of setosus, and much 

 larger and heavier than that of Sorex obscurus obscurus; braincase 

 broad, slightly flattened; rostrum relatively rather long and wide; inter- 

 orbital region somewhat elongate, not much depressed ; dentition mod- 

 erately heavy, with intense and moderately extensive pigmentation. 



Measurements. — Type (adult male): Total length, 117; tail vertebrae, 

 51; hind foot, 14. Skull: Type (adult male; teeth slightly worn): Con- 

 dylobasal length, 17.9; palatal length, 7.2; breadth of cranium, 8.8; 

 interorbital breadth, 3.7; maxillary breadth, 5.2; maxillary tooth row 

 (anterior edge of second upper incisor to posterior edge of last upper 

 molar measured at alveolar border), 6.4. 



Remarks. — The series of seventeen specimens of Sorex obscurus per- 

 miliensis from the type locality was collected during the first week of 

 October, 1897. Three of these specimens are in worn summer pelage; 

 the others, including the type, are in various stages of transition from 

 summer to winter pelage; none has acquired the full winter coat. Speci- 

 mens have also been examined from Mount Hood and Detroit, Oregon. 

 The Detroit specimen shows in some respects an approach toward bairdi. 

 Intergradation with Sorex obscurus setosus seems to be indicated in a 

 specimen of setosus from Conrad Meadows, Yakima County, Washington. 



