U. S. NATIONAL MUSEUM 



BULLETIN 36, PL. V 



Fig. 1. Sotcilia fluviatilis (Gervais). 

 (From Castelnau, Expedition dans I'Amerique du Sud, pi, 7. Zoologie, lL5b, pi, 9, fig. 1.) 





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Fig. 2. Sotalia tucuxi Gray. 

 (From a photograph of the type-skull, No. 1I89«, ^, in the British Museunn.) 



Genus SOTALIA. 



