350 University of California Publications in Zoology [Vol. 12 



of the Transition zone gradually worked up from the valley; and 

 yet the higher zone forms are not yet altogether crowded out. 

 It is only a question of time, it would seem, before the locality will 

 become more purely Transition. At any rate, Castle Lake proved 

 an interesting collecting point and made a good finish for our trip, 

 which terminated at Sisson on August 23. 



CHECK LIST OF THE MAMMALS 



1. Scapanus latimanus latimanus (Bachman). 



2. Neurotrichus gibbsi major Merriam. 



3. Sorex vagrans amoenus (Merriam). 



4. Sorex montereyensis montereyensis Merriam. 



5. Myotis longicrus longicrus (True). 



6. Lasionycteris noctivagans (LeConte). 



7. Eptesicus fuscus fuscus (Beauvois). 



8. Ursus americanus Pallas. 



9. Canis lestes Merriam. 



10. Urocyon cinereoargenteus townsendi Merriam. 



11. Bassariscus astutus raptor (Baird). 



12. Procyon psora pacifiea Merriam. 



13. Maries caurina caurina (Merriam). 



14. Martes pennanti pacifiea (Rhoads). 



15. Mustela muricus (Bangs). 



16. Mustela saturata (Merriam). 



17. Mustela vison energumenos (Bangs). 



18. Spilogale phenax phenax Merriam. 



19. Mephitis occidentalis occidentalis Baird. 



20. Felis oregonensis oregonensis Rafinesque. 



21. Lynx fasciatus Rafinesque. 



22. Reithrodontomys megalotis klamathensis Merriam. 



23. Peromyscus maniculatus gambelii (Baird). 



24. Peromyscus boylii boylii (Baird). 



25. Peromyscus truei gilberti (Allen). 



26. Neotoma fuscipes fuscipes Baird. 



27. Neotoma cinerea occidentalis Baird. 



28. Evotomys obscurus Merriam. 



29. Microtus montanus montanus (Peale). 



30. Microtus californicus californicus (Peale). 



31. Microtus mordax mordax (Merriam). 



32. Thomomys leucodon navus Merriam. 



33. Thomomys monticola pinetorum Merriam. 



34. Dipodomys californicus trinitatis, subsp. nov. 



35. Zapus trinotatus alleni Elliot. 



36. Aplodontia chryseola Kellogg. 



37. Citellus douglasii (Richardson). 



38. Eutamias amoenus amoenus (Allen). 



39. Eutamias senex (Allen). 





