lobate, [157];
pelvic, [158];
caudal, [159];
modified to form suckers, [161];
degeneration and atrophy, [162];
endoskeletal elements, [234], [235], [236], [237], [239], [240], [241], [242], [243], [244], [245], [246];
exoskeletal elements, [158], [234], [236]
Fin-rays, of Amphioxus, [120];
of Fishes, [158], [234], [236]
Fishes, [141] f.;