“Diagrams of some principal forms of tails in fishes. A, protocercal fin (as in Polypterus); B, heterocercal (as in Sharks); C, homocercal (as in most Teleosts); D, homocercal (as in Amia).” -Galloway, 1915
Thomas Walton Galloway Textbook of Zoology (Philadelphia, PA: P. Blakiston's Son & Co., 1915)
2400×1531, 593.6 KiB
1024×653, 108.3 KiB
640×408, 55.6 KiB
320×204, 17.8 KiB