62 THE ANIMALS OF NEW ZEALAND 



The Cow-fish. 



Tursiops tursio. 



Beak rather less than one-third of the gape. Flippers equal to the, 

 distance between the muzzle and the eye. Teeth, about 22 in each 

 jaw, two or three in an inch. Above, including the upper jaw, dark 

 slate-blue, passing gradually into white below. Fins, slate-blue. Length 

 seven to ten feet. Southern parts of New Zealand. 



Genus Prodelphimis. 



Teeth, 30 to 50 in each jaw, small. Plate of the skull without 

 lateral grooves. 



The Bottle-nose. 



Prodelphimis ohscunis. 



Beak short, but very distinct. Dorsal fin falcate. Flippers longer 

 than the distance from the muzzle to the eye. Teeth, 24 to 28 in each 

 jaw, about five to an inch. Back and fins blackish, the muzzle and belly 

 white. A white band from below the dorsal fin sloping obliquely down- 

 ward and backward towards the tail. Length, about five feet. Northern 

 parts of New Zealand. Common in Cook Strait. 



Genus GraDipus. 

 Risso's Dolphin. 

 Grampus griseus. 



No teeth in upper jaw, but three to seven on each side of mandible 

 near to the symphysis. No beak. Pectoral fin long, pointed, falcate; 

 dorsal fin high and falcate. Length from 10 to 13 feet. Grey, varying on 

 the fins and tail to black, and to white on the belly. Mainly Mediterranean 

 and North Atlantic in range. There is only one species in the genus. 

 (Beddard.) 



As stated in the Introduction, " Pelorus Jack " is officially- 

 gazetted as a Grampus dolphin. It is the only member of its 

 genus recorded in New Zealand waters. Professor Beddard 

 states that the Grampus, like many other cetaceans, has no very 

 fixed limits to its range, and it mav go from the Mediterranean 



