FAMILY DELPHINIDAE 



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3. Rostrum higher than broad. 

 Rostrum broader than high. 



4. Rostral groove deep. 

 Rostral groove shallow. 



M. haasti. 



4. 

 M. australis. 

 M. grayi. 



Fa mily Dc IpJi inidae . 

 Teeth usually numerous in Ijotli jaws. Blow hole transverse, 

 crescentic, with the horns of the crescent pointing forward. 



Skull of Scamperdown Whale. 



Genus Delphinapterus. 

 Teeth, from eight to ten on each side of the jaw, rather small, 

 separated by intervals considerably wider than the diameter of 

 the teeth. Flippers short and broad. No dorsal fin, but a low 

 ridge in its place. 



