4. TTjBsio. 255 



small, conical, extending the greater part of the length of the jaws. 

 Palate flat. 



Grampus, sp., Chay, iS^je. Zkiol. 2, 1828. 



Delphinus f « (Tureio), Gray, Zool. Ereh. 8f Terr. 36, 1817: Cat. Cetac. 



R M. 105, 1850 ; P. Z. S. 1863 ; 1864, 236. 

 Cephalorhynchus, F. Cuvier, Citac. 



Delphinus §. Cephalorhynchus, Gray, Cat. Cetac. B. M. 106. 

 Tursiops, Gervais, Mamm. 323. 



I. Beak short. Mostrum of skidl expanded over the whits, thick, conical, 

 convex above, half as long as the head. 



a. Rostrum of skull slender, subeyUndrical. Nos. 1, 2. 



b. Rostrum of skull rather thick, conical, evenly tapering. Nos. 3, 4. 



c. Rostrum of skull rather thick, and rather swollen on the sides. 5, 6, 7, 8. 



U. Beak short. Rostrum of skull very broad, half as long as the head, 

 shelving on the side. Skull shelving over the orbits. Eutrope. 



III. Beak scarcely produced.. Rostrum of skuU rather depressed, scarcely 

 longer than the brain-cavity, convex. Skull expanded over the orbit. 

 Teeth ll-fi. 



I. Beak short. Rostrum of skull thick, conical, convex above, half as long as 

 the head. Tursio. 



Tuisio, Gray, Zool. Ereb. Sf Terr. 37 ; Cat. Cetac. B. M. 1850, 109. 

 Cetus, sp., Brisson. 



a. Rostrum of skidl slender, subcyUndriccd. Teeth ^-^\. 



1. Tursio Doris. The Boris. 



SkuU roundish; rostrum depressed, four-sevenths of the entire 

 length, and twice and one-third the length of the width at the notch, 

 concave behind, rounded on the sides, convex in the middle of the 

 central ridge, flattened in front ; intermaxUlaries convex, especially in 

 the middle of their length, with a groove between them in front ; an 

 irregular impression in front of the blower, rather elongate, extend- 

 ing a little before the line of the hinder teeth. Teeth ||- or ^, slender, 

 conical, iacurved, acute ; lower jaw slender, very obliquely truncated ; 

 palate rather convex in front, taperiag, shortly grooved behind. 



Delphinus Doris, Gray, Cat. Osteol. B. M. 36 ; Zool. Erebus ^ Terror, 

 39. t. 20 (skull) ; Cat. Cetac. B. M. 1850, 114. 



Inhab. ? 



a. Skidl ? The specimen figured in the ' Yoyage of the Erebus 



and Terror,' t. 20. j^^ U^ 



SkuU: Length, entire 17 4 



Length of head 7 3 



Length of nose 10 1 



Length of teeth-line 9 2 



"Width at temples 7 9 



Width at nostrUs 4 4 



Width at middle of beak 2 4 



Width at intermaxiUaries 1 1 



