Historical illustration of a basking shark and a porbeagle (under the obsolete name Lamna cornubica), both commercially important species.

Description
English: Plate 249. The Basking Shark, or Bone Shark. Cetorhinus maximus (L.), Blainville. The Mackerel Shark. Lamna cornubica, (Gmel.) Fleming.
Source http://www.photolib.noaa.gov/htmls/figb0520.htm
Author NOAA's Historic Fisheries Collection
Source: https://commons.wikimedia.org/wiki/File:Porbeagle_basking_shark_drawing.jpg

The porbeagle (Lamna nasus) is a species of mackerel shark in the family Lamnidae, distributed widely in the cold and temperate marine waters of the North Atlantic and Southern Hemisphere. In the North Pacific, its ecological equivalent is the closely related salmon shark (L. ditropis). The porbeagle typically reaches 2.5 m in length and a weight of 135 kg. Order: Lamniformes, Family: Lamnidae, Genus: Lamna, Species: Lamna nasus (Bonnaterre, 1788).
Synonyms:
Lamna philippii Perez Canto, 1886
Lamna punctata Storer, 1839
Lamna whitleyi Phillipps, 1935
Oxyrhina daekayi Gill, 1861
Selanonius walkeri Fleming, 1828
Squalus cornubicus Gmelin, 1789
Squalus cornubiensis Pennant, 1812
Squalus monensis Shaw, 1804
Squalus nasus Bonnaterre, 1788
Squalus pennanti Walbaum, 1792
Squalus selanonus Leach, 1818