182 I' iiii-i rsity of California Publications in Zoology [Vol. 10 



Sooty brown, or black; dull dark brownish beneath 



Tail sharply bicolor, dusky above, whitish beneath; body above 

 varying from slate-black to dull seal brown, beneath washed 



with sepia S. monten yi nsis 



Tail uniform in color, dusky both above and below 



Body black dorsally with steely reflections; ears colored like 



body S. sinuosus 



Body sooty brown dorsally; ears warm brown in contrast with 

 body color S. halieoetes 



CRANIAL MEASUREMENTS! Z<± «g | *S | J% | 



ll 5 1 *| .c|J 



Mus. t£ :- £ '3 g * q 2 



Name No. Sex Age Locality Oo &Z Sj PS.S.3 



Sores vagrans 11,826 <$ yg. ad. Eureka, Calif 16.1 8.2 5.4 667c 



Sorex halieoetes .. 3,639 J yg. ad. Palo Alto, Calif. 17.5 8.5 5.3 62% 



Sorex californicus.. 10,S47 J yg- ad. Petaluma, Calif . 16.4 7.8 4.6 59% 



Sorex sinuosus 16,470 ? yg. ad. Grizzly Island, Calif. 16.8 7.6 4.3 57% 



Sorex montereyensis 3,467 <j> yg. ad. Monterey, Calif. 19.2 9.0 5.5 61% 



Sorex pacificus 11,749 £ old ad. Eureka, Calif . 22.4 10.9 6.0 55% 



1 Measurements of single, selected skulls are given rather than averages because 



of the paucity of exactly comparable (as to age), and at the same time unbroken, 

 material. All measurements are in millimeters. 



- Including incisors. 



(sD 



l 



Figs. 1-6. Braincases of shrews, as viewed in outline from directly 

 behind; note varying ratio of height to width, in other words, degree 

 of "inflation." All X l 1 ^ 



1. Sorex vagrans vagrans, 5; Ferndale, Humboldt County, Cali- 



fornia; no. 11830, Mus. Vert. Zool. 



2. Sorex halieoetes, $?; Palo Alto, Santa Clara County, California; 



no. 3635, Mus. Vert. Zool. 



3. Sorex sinuosus, $; Grizzly Island, Solano County, California; 



no. 16470, Mus. Vert. Zool. 



4. Sorex californicus, r?; Petaluma, Sonoma County, California; no. 



10848, Mus. Vert. Zool. (This skull is broken on top.) 



5. Sorex montereyensis, $; Monterey, Monterey Count} - , California; 



no. 3467, Mus. Vert. Zool. 



6. Sorex pacificus, <$; Trinidad, Humboldt County, California; no. 



11,791, Mus. Vert. Zool. 



