PSEUDORCA. 73 
1, DELPHINAPTERUS KINGI, Gray (1827). 
Southern (White 9) 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. 
fteferences.—Gray, B. M. Catal. Seals and Whales, p. 309, 
and Suppl. p. 95. ? 
Genus Il.—ORCA, Gray (1846). 
Pterygoid bones of normal form, but not quite meeting in the 
median line. First, second, and sometimes the third cervical 
vertebre united, the rest free. Fore-limb large, ovate, nearly as 
broad as long. Dorsal fin very high and pointed, situated near 
the middle of the back. Anterior part of the head very broad 
and depressed. 
Vertebre.—C. 7, D. 11 or 12, L. 10, Cd. 23=51 or 52. 
Dentition.—About +3, 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 vertebre united. Bodies of 
the lumbar vertebre 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. 
Vertebre.—C. 7, D. 10, L. 9, Cd. 24=50. 
Dentition.— About +85, their roots cylindrical. 
