Long-finned pilot whales, Globicephala melas. Plate from a collection of pencil sketches and watercolour drawings of British mammals.
Date between circa 1890 and circa 1910
Source http://www.nhm.ac.uk/business-centre/publishing/partners/index.html
Author Edward Adrian Wilson (1872-1912)
Source: https://commons.wikimedia.org/wiki/File:Edward_Adrian_Wilson00.jpg

The long-finned pilot whale (Globicephala melas) is a large species of oceanic dolphin. Long-finned pilot whales are known as such because of their unusually long pectoral fins. Long-finned pilot whales are found in the North Atlantic (subspecies Globicephala melas melas), as well as the Southern Hemisphere (subspecies Globicephala melas edwardii).