PROC. CAL. ACAD. SCI., 4th Series, Vol. V. 



[TAYLOR] Plate 15 



DORSAL VIEW OF CRAXL\ OF PHEXACOMYS. 



Xo. L Phciiacoinys ( Phciiacoiriys ) iiitcniicdiiis : X'o. 2, Phciiacoiiiys 

 ( Plieuacoinys) orophilus: Xo. 3. Phciiacoinys (Arboriimis) albipcs: Xo. 4, 

 Phcnacomys (Arboriimis) loiii^icaiidiis. About twice natural size. 



X'ote the narrower interorhital constriction in .Irboriiiiits ; the length 

 and narrowness of the cranium of albipcs, as well as the length of its brain 

 case; and the general similarity in cranial outline obtaining between the two 

 subgenera, shown particularly well in the comparison of loiigicaiidus with 

 iiifcniicdiiis and orophilus. 



