264 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. III. 



grayish appearance, and with a black border and pale buff fringe, 

 beneath mixed buff and black with the black border showing 

 indistinctly in places, most clearly shown at base and tip; ears 

 black. 



Measurements. Total length, 476.2; tail vertebrae, 184; 

 hind foot, 60. Skull: occipito-nasal length, 60.5; zygomatic 

 width, 39; interorbital constriction, 15.5; across postorbital 

 processes, 27; width of braincase above zygomata,' 25.3; length 

 of braincase, occipital rim to frontoparietal svyture, 31; median 

 length of nasals, 19; lateral length of nasals, 20; length of basi 

 occipital, 7; posterior width of basioccipital, 10; length of ptery- 

 goids, ii ; palatal length, 30; length of bullae, 12; width of bullae, 

 10 ; length of upper tooth row, 12; length of mandible, angle to 

 alveolus of incisor on inner side, 36; height at condyle, 19; at 

 coronoid process, 19; length of lower tooth row, n. 



This is a well-marked island form, perhaps nearest to C. v. 

 fisheri, but very much darker in general hue, with an entirely 

 differently colored tail, and distinct cranial characters as given 

 above. The skulls of the two forms on comparison are con- 

 spicuously different. The general tone of the pelage including the 

 tail is* a dark gray, with tawny ochraceous tints appearing amid 

 black, and this last hue is massed on the middle of the back, 

 but with tawny ochraceous showing in a diminished degree. 

 Three specimens were procured on Santa Catalina Island by Mr. J. 

 Rowley, a male and two females, the only difference perceptible 

 between them being the absence of the black patch on the top 

 of the head, this part on the females being tawny ochraceous 

 mixed with black, like the major portion of the upper parts. 



FAM. MURID.E. 

 PEROMYSCUS. 



Peromyscus montipinoris, Sp. nov. 



Type locality. Lockwood Valley, Mount Pinos, * Ventura 

 County, California. 



Genl. Char. Size, medium; tail very long, hairy, penicillate; 

 ears large; hind foot long; color pale; skull similar to that of 

 P. truii, but with longer nasals and a broader and longer brain- 

 case and narrower interorbital region. 



Color. Top of head and back mixed cinereous and buff, 



* In the description of Perognalhus elibalus, Pub. 87, p. 252, Mt. Pinos was 

 wrongly placed in Los Angeles County. It should be Ventura County. 



