402 University of California Publications in Zoology [Vol. 12 



Neurotrichus gibbsi major (status of races not worked out satisfac- 

 torily; while the genus belongs to the northwest coast belt, there 

 may prove to be a Sierran subspecies with which the Trinity 

 animal belongs). 



Sorex montereyensis montereyensis (but slightly different from the 

 Sierran form, 8. m. mariposae). 



Lynx fasciatus. 



Odocoileus columbiantts columbianus. 



BIRDS 



Oreortyx picta picta. 



Dendragapus obsvurus fuliginosus (intergradient towards the Sierran 

 form sierrae). 



Melospiza melodia rufina (in winter, only). 



Penthestes atricapillus occidentalis. 



Penthestes rufescens rufescens (in winter, only?). 



Hyloeichla guttata slevini. 

 Table 5. Boreal species of the Trinity region which appear to be 

 endemic, that is, different from related forms in either the Sierra Nevada, 

 the Cascades, or the humid coast belt. 



MAMMALS 



Thom.om.y8 monticola pinetorum (extends also to Mount Shasta). 



Aplodontia cliryseola. 



Callospermophilus chrysodeirus trinitatis. 



Glaucomys sabrinus flaviventris. 



BIRDS 

 (none) 



Table 6. Sonoran species of the Trinity region which belong to variable 

 groups and which are identical with, or show nearest affinities to, repre- 

 sentatives in the Sacramento Valley. 



MAMMALS 



Bassariscus astutus raptor (extends also through the coast ranges to 



the southward and into Oregon on the north). 

 Spilogale phenax phenax (wide-ranging through the coastal region to 



the south). 

 Mephitis occidentalis occidentalis (wide-ranging through many faunas 



to the south). 

 Peromyscus boylii boylii. 

 Peromyscus truei gilberti. 

 Microtus californicus californicus. 

 Thomomys leucodon navus. 

 Dipodomys californicus trinitatis (slightly different from the form 



D. c. californicus of the upper Sacramento Valley). 

 Lepus californicus californicus (also ranges locally nearly or quite 



through the coast belt). 



