152 CETACEA. 



Phocsena grisea. 



Phocana grisea, Lesson, Nat. Lib. vol. vii. (figured). 

 Deljphinus griseits, Desm. Mamm. Sp. 775 ; F. Cuvier, Cetacea. 

 Grampus Guvieri, Gray, Cat. Brit. Mus. Cet. 1850. 



Desceiptton. — Head large, obtuse, somewhat rounded ; 

 the upper jaw several inches longer than the lower ; the 

 teeth of the upper jaw fall out while it is still young, as 

 do many of those of the lower jaw. The most usual dental 

 formulary is said to be ?^-?. The dorsal fin commences 

 about the middle of the back, is elevated and pointed, but 

 is lower and placed further back than in P. Orca ; pec- 

 torals very much developed ; the tail large. Colours, 

 bluish black above, dull white beneath, merging into each 

 other on the sides. 



Total length, 10 or 11 feet. In an individual of 10 

 feet long (see Gray's Catalogue), the length of the pec- 

 torals is 3 feet ; height of dorsal, 1 foot 2 inches ; entii'e 

 length of skull, 17| inches. 



Resembles the Phoccena melas somewhat in appearance 

 and habit, but is much smaller, and its dorsal fin is much 

 more elevated. 



Inhabits the North Sea ; has been taken in a few in- 

 stances on the north coast of France, once at Brest, then 

 at Aiguillon in La Vendee, in 1822 ; and one on the Isle 

 of Wight in 1845. 



Phocssna Rissoana. 



PhociBna Eissoana, Lesson. 



Delphinus Bissoanus, Desm. Mamm. Sp. 778. 



Grampus Bissoanus, Gtray, Cat. Brit. Mus. Cet. 



Desceiption. — Teeth conical, early deciduous, especially 

 those of the upper jaw. In the individual here described, 

 taken at Nice, there were in all only ten teeth, viz. five on 



