U. S. NATIONAL MUSEUM 



BULLETIN 36, PL. XX 



Fig. 1. Pro(lel2)hinusfra:natus(F.Cu\ier). Young. 



(From F. Cuvier, Histoire naturelle des Cetace's, 1836, pi. 10, fig. 1.) 



Fig. 2. Prodelphinus longirostris (Gray). 

 (From Gray, Synopsis of the Whales and Dolphins, 1868, pi. 25. DelpJdnus microj)S.) 



Genus PRODELPHINUS. 



