:i 1 



DR. H. GADOW ON THE SPJCCIES OF RHKA. [Mar. 17, 



Fie. 1. 



Skull of Rk. americajui, § natural size. Upper surface. 

 Fis. 2. 



Fig. 2. Skull of Bh. macrorh/ncha, | natural size. Upper surface. 

 Fig. 3. Skull o{ Bh. darwini, § natuial size. Upper surlace. 



