90 ORCADiB. 



the blowers flat. Lower jaw thick in front; symphysis short. 

 Teeth large. 



Vertebrae 51 or 52 :— C. 7. D. 11 or 12. L. and C. 33. 



The first three cervical vertebrae united into one mass by their 

 bodies and dorsal processes, the rest more or less free. Pectoral 

 fin broad and rounded at the end. " Carpal bone single, in a large 

 mass of cartilage." 



1. OECA. 



Orca, Gray, P. Z. S. 1870, p. 70. 

 Beak of the skuU from the notch before the orbit the same length 

 as from the notch to the condyles ; the width at the notch three- 

 fifths of the length of the beak. The occipital end of the skuU 

 slightly concave. Condyles of moderate size. Lower jaw broad on 

 the sides, very thick and solid in front. 



A. The beak of the skull tapermg and narrow in front, end narrow. 

 Gladiator. 



1. Orca stenorhyncha. (Figs. 7 & 9.) ' , B.M. 



Orca stenorhyncha. Gray, P. Z. S. 1870, p. 71, figs. 1 & 3 (skull). 

 Orca gladiator, Chray, Cat. Seals Sc Whales, p. 279. 



Inhab. North Sea. Skeleton from Weymouth, and a skuH from 

 the English coast. B.M. 



IntermaxiUaries narrow in the middle and rather dilated in front ; 

 but the extent of dilatation varies in the two specimens. 



The examination of the four skulls of Orca found on the English 

 coast show they belong to two very distinct species, one with a much 

 more attenuated beak than the other. 



B. Beak of the skull spatulate ; sides of the hinder half nearly parallel, of 

 the front half arched and converging ; endrownded, middle rather wider 

 than at the notch. Orca. 



2. Orca capemsis. (Figs. 8 & 10.) B.M. 



Orca capensis, Gray, Cat. Seals Sf Whales, p. 283 ; P. Z. S. 1870, p. 71, 



figs. 2 & 4. 

 Delphinus orca, Owen. 

 Grampus gladiator, Smith, South-African Zool. p. 126. 



Inhab. Cape of Good Hope (Viney, B.M. ; Villette, Mus. Coll. 

 Surg. no. 1139); Seychelles Islands {Swinburne Ward). 



In the Cape specimen the intermaxillaries are nearly of the same 

 width in the whole of their length ; in the Seychelles skull they are 

 contracted in the greater part of their length, and rather dilated in 

 front. 



Mr. Swinburne Ward has kindly sent a very beautiful skull of a 

 " KiUer " taken in the sea near the Seychelle Islands. 



