290 DKLPHINID^. 



and behind ; crown oval, rounded, and divided into two lobes by a 

 groove which extends their whole length. 



Inhab. Mediterranean : Malta. 



Length 14 feet. Skull : length 1 foot 10 inches, breadth 1 foot 

 5 inches ; length of teeth 1 inch, breadth of line ^ inch. Cuvier 

 thinks this is probably Orca gladiator. 



2. Delphinus Orca, Cha7nisso,Nov. Act. xii. t. 20. f.9; Pallas, Zoogr, Rosso- 

 Asiat. i. 285 ; Tilesiiis, Isis, 1835, 726. 



Inhab. North Pacific: Kamtschatka. 



3. Dr. J. R. Foster mentions DelpJiinus Orca as occurring in the 

 Eastern tropical islands. — Descrip. Anim. 210. 



8. PSEUDORCA. 



Head rounded, scarcely beaked. Skull rounded, the hinder wings 

 of the maxilla horizontally spread over the orbits. The beak short, 

 broad, tapering ; intermaxiUaiy broad, covering great part (more 

 than half) of the maxilla. The triangle in front of the blowers, 

 concave. Teeth conical, acute, large, occupying the whole edge 

 nearly to the notch. Dorsal fin moderate, in the middle of the back. 

 Pectoral small, ovate. Black, rather paler below. 



Pseudorca, Hemhardt, Overs. K. D. Vid. 1862 ; Floioer, Proc. Zool. 



Soc. 1865. 

 Orca, sp., Gray, Cat. Cetac. 1851, 95. 

 Phocsena, sp., Owen, Brit. Foss. Mamm. 



1. Pseudorca crassidens. The Lincolnshire Killer. 



Intermaxillaries rugose in front. Teeth \^, large, conical, rather 

 acute (all but the front lower false), extending nearly to the pre- 

 orbital notch. Lower jaw very depressed, and broad in front at the 

 symphysis. 



Phocfena crassidens, Oioen, Brit. Fossil Manun. 516. f. 213, 214, 216 



(skull and united cervical vertebrfe). 

 Orca crassidens, Gray, Zool. Erebus iif Terror, 33 ; Cat. Cetac. B. M. 



1850,95. 

 Pseudorca crassidens, Reinhardt, Overs. K. D. Vid. Selsk. Forhand. i. 



1862, 104. f. 1, 2, 3. 



Inhab. North Sea, in shoals (Beinhardt). Fens of Lincolnshire : 

 fossil skull in Mus. Stamford (now in Mus. Cambridge), of the fol- 

 lowing measurements : — jjj \\-^^ 



Skull : Length, entire 23 or 24 



Length of nose 12 6 



Length of teeth-line 10 



Length of lower jaw 21 



Breadth at notch 8 6 



Breadth at middle of beak 8 



Breadth of intermaxillaries 5 



In the figure the length of the beak is once and a half the breadth 

 of the base at the notch, and exactly the length of the skull. 



