The skull very similar to that of the Cape species, but much smaller; but the beak is rather narrower, the intermaxillaries moderately broad, slightly dilated in front.
Inhab. North Sea.
An adult skull from the coast of Essex (361 a), and another without the lower jaw, are in the British Museum.
These skulls of the smaller British, or, rather, European Orca are distinguishable from those of O. gladiator by the smaller size and the broader, rounder nose—and from the skulls of the Cape-of-Good-Hope species by being of a much smaller species, and having a depressed crown of the head.
I believe the skull figured under the name of Delphinus orca by Cuvier, Oss. Foss. vol. v. tab. 22. figs. 3, 4, represents this species, from the form of the beak and the narrowness of the occiput: this figure has been copied by various British and other authors.
1. Orca gladiator, var. arcticus (O. Eschrichtii), Gervais, Ostéogr. Cét. t. 47. fig. 3.
Inhab. Faroe Islands.
2. Orca gladiator, var. europæus, Gervais, Ostéogr. Cét. t. 47. f. 4.
Orca gladiator, Gervais, l. c. t. 48. f. 1.