SOIURIDiE— SCIURUS ABERTI. 



737 



variety. Its chief differential character was the supposed permanent absence 

 of ear-tufts, which additional material shows may be absent or present in 

 specimens from the same locality. I am, in fact, unable to appreciate any 

 differences in the limited material (twenty specimens) before me that are 

 peculiar to particular localities. 



Table XXXVIII. — Measurements of ten specimens of Sciuhus aberti. 



' Measurements from Prof. Baird's Mam. N. Amer. p. 266. 



Table XXXIX. — Measurements of two slirflx of Sciurus aberti. 



47 M 



