PSEUDORCA. 73 



1. DELPHINAPTERUS KINGI, Gray (1827). 

 Southern (White P) Whale. 



A skull of a Dolphin, generically inseparable from the D. leucas 

 of the Arctic Seas is in the British Museum, said to be from the 

 coast of New Holland, and was described by Dr. Gray under the 

 above name. No other specimen has been obtained. 



References. Gray, B. M. Catal. Seals and Whales, p. 309, 

 and Suppl. p. 95. 1 



Genus II. ORCA, Gray (1846). 



Pterygoicl bones of normal form, but not quite meeting in the 

 median line. First, second, and sometimes the third cervical 

 vertebra united, the rest free. Fore-limb large, ovate, nearly as 

 broad as long. Dorsal tin very high and pointed, situated near 

 the middle of the back. Anterior part of the head very broad 

 and depressed. 



Vertebra. C. 7, D. 11 or 12, L. 10, Cd. 23 = 51 or 52. 



Dentition. About H, occupying nearly the whole length of the 

 beak, very large and stout, with conical, recurved crowns, and 

 large roots, expanded laterally, and flattened or rather hollowed 

 on their anterior or posterior surfaces. 



1. ORCA GLADIATOR, Bonnaterre (1789). 

 Killer. 



Black above, shading into white on the abdomen, with a more 

 or less developed white patch above and somewhat behind the eye. 



Dimensions. Males up to twenty feet ; females much smaller. 



References. Gray, B.M. Catal. Seals and Whales, p. 279; Scott, 

 Seals and Whales, p. 88. 



Note. These are powerful and rapacious animals frequenting 

 all seas from Greenland to Tasmania ; many species have been 

 described but no specific differential characters have been clearly 

 defined. 



Genus III. PSEUDORCA, Reinhardt (1862). 



First to sixth or seventh cervical vertebrae united. Bodies of 

 the lumbar vertebrae elongated. Fore limb of moderate size, 

 narrow, and pointed. Dorsal fin situated near the middle of the 

 back, of moderate size, falcate. Head in front of blow-hole high 

 and compressed anteriorly. Snout truncate. 



Vertebrae. C. 7, D. 10, L. 9, Cd. 24 = 50. 

 Dentition. About -A-, their roots cylindrical. 



