34 CALIFORNIA ACADEMY OF SCIENCES [Proc. 30 Ser. 



EXPLANATION OF PLATE V. 

 Xaniusia river simia Cope. 



Fig. I. Cal. Acad. Sci. no. 3571, San Clemente Island, California. General 



view, X %. 

 Fig. 2. Cal. Acad. Sci. no. 6613, San Nicolas Island, California, Joseph 



Grinnell, May 22, 1897. Natural size. 



