236 Uxivrrsity of California PnhJicaiions in Zoologn. [Vol. 7 



the nose to the tail. The animal in coloration agrees well with the 

 eharacterization of this form by Osgood (1909, p. 230). There is 

 a pectoral spot of buff present. The two jiivenals have no bnffy 

 anywhere on the pelage, and are of a uniform mouse gray. 

 Ventrally more or less of the plumbeous bases of the hairs show 

 through, modifying the otherwise pure white of that region. 



The cranium of the adult Nevada specimen conforms well 

 with Osgood's description (1909, p. 230). However, the rostrum, 

 though depressed, exhibits no dorsal rounding. The skulls of the 

 immatures are smaller than that of the adult in every measure- 

 ment except that of the shelf of bony palate. 



External Measurements of Three Specimens of Peromyscus crinitiis 

 From Pine Forest Mountains, Humboldt County, Nevada. 



For method of taking measurements, see Introduction. 

 All dimensions are in millimeters. 



Museum iios. and sex 8110^^ ad. 8111 ^Juv. 8112 ^juv. 



Total length 170 147 156 



Tail vertebrae 90 77 80 



Hind foot 21 18 20 

 Ear from notch 



(measured in dry skin) 18 14.5 13 

 Ratio tail vertebrae to total 



length 52.9 52.3 51.2 



Measurements op Three Skulls op Peromyscus crinitus From Pixe 

 Forest Mountains, Humboldt County, Nevada. 



Museum nos. and sex 8110^? ad. 8111 ^juv. 8112 ^^juv. 



Greatest length 24 3 23.0 



Basilar length of Hensel 18.4 17.0 



Zygomatic width 11.9 ll.<i 



Tnterorbital constriction 4.1 4.1 4.1 



Interparietal 2.8X9.8 



Nasals 9.0 8.1 8.6 



Shelf of bonv palate 3.6 3.8 3./ 



Palatine slits •'5.2 4.8 4.8 



Diastema 6.0 5.2 5.2 



Postpalatal length 8.6 7.9 



Maxillary tooth row 3.4 3.3 3.4 



H.Mjrrs .\Nn Disthibution.— The canon mouse was recorded 

 from two kx.alities only, both in the Pine Forest Abmntains. The 

 adult and one of the juvenals (nos. 8110, 8111) were caught ... 

 the rocks on the north side of a ridge near Hig (^reek Ranch at 



