158 SPECIMENS OF SIRENIA. 



Family III. RHYTINID^. 



(A single genus.) 



I. RHYTINA. (Rh.) 



(1) Rhytina stelleri. (Rh. st.) 

 Illiger, Prodroiiius, 1811. 



No teeth. 



This species, the Northern Sea Cow, was discovered 

 by Behring in the North Pacific on the shores of 

 Behring Island. It became extinct in the eighteenth 

 century. 



No specimen in Museum. 



