120 



NORTH AMEEICAN FAUNA. 



[NO. 39. 



6.4; alveolar length of upper molar series, 7.3. Skull of adult male 

 from Happy Lake: 34.6; 14.3; 22; 17; 6.3; 7. 



Remarks. — Only females and one young male of this form have 

 been examined from the type locality, and in these the cranial 

 characters are not perfectly shown. Specimens of adult male and 

 female from Happy Lake, near the type locality, in the collection of 

 the Field Museum, indicate a closer relationship with yelmensis and 

 douglasi than was formerly supposed. The relationship of the form 

 seems best indicated by considering it a subspecies of douglasi, 

 although at present direct geographic connection is improbable. 



Specimens examined. — Total number, 14, as follows: 

 Washington (Olympic Mountains): Happy Lake, 9; Soleduck River (head), 5.^ 



THOMOMYS LIMOSUS Merriam. 

 White Salmon Pocket Gopher. 



(PL Vni, fig. 12.) 



Thomomys limosus Merriam, Proc. Biol. Soc. Washington, XIV, 116, July 19, 1901. 



Type. — Collected at White Salmon, gorge of the Columbia, Klick- 

 itat County, Washington, by J. Alden Loring, June 26, 1897. Type 

 specimen in U. S. Nat. Mus., Biological Survey collection. 



Distribution. — Known only from type locality (fig. 5) . 



Characters. — Size and proportions of douglasi, but darker colored 

 and with blackish ear patch; skull shorter and wider. 



Color. — June pelage: Upperparts dull chestnut, with plumbeous 

 nose and blackish ear patches; imderparts slightly paler, more 

 ochraceous; in about half the specimens a white spot on breast; feet 

 and tail soiled whitish. Young: Half -grown specimens very similar 

 to adults, but slightly paler, and belly more huffy. 



Skull. — Relatively short and wide with more arched dorsal outline 

 and wide-spreading zygomata; nasals with emarginate, spreading; 

 posterior tips, terminating approximately even with tips of pre- 

 maxillae; bullae low and narrow, and anterior shaft of basioccipital 

 correspondingly wide between them; pterygoids small, with narrow 

 fossa. 



Measurements. — Type ( c? ad.): Total length, 224; tail vertebrae, 

 68; hind foot, 30. Average of 3 topotypes ( ad.): 224, 69, 29.3. 

 Topotype (9 ad.): 216, 66, 27. iSMZ (of type) : Basal length, 34.5; 

 nasals, 14; zygomatic breadth, 23.5; mastoid breadth, 20; interorbital 

 breadth, 6.2; alveolar length of upper molar series, 8. 



Remarks. — While so strikingly different from douglasi as to require 

 specific rank, this form is included in the douglasi group because of 

 its prominent, rounded ear, heavy claws, and general skull characters 



1 Two adult and two immature females, and one immature male. 



