Shoulder-girdle of a Sea-catfish, _Selenaspis dowi_. 86 Clavicles of a Sea-catfish, _Selenaspis dowi_. 87 Shoulder-girdle of a Batfish, _Ogcocephalus radiatus_. 88 Shoulder-girdle of a Threadfin, _Polydactylus approximans_. 89 Gill-basket of Lamprey. 92 Weberian Apparatus and Air-bladder of Carp. 93 Brain of a Shark, _Squatina squatina_. 110 Brain of _Chimæra monstrosa_. 110 Brain of _Polypterus annectens_. 110 Brain of a Perch, _Perca flavescens_. 111 _Petromyzon marinus unicolor._ Head of Lake Lamprey, showing Pineal Body. 111 _Chologaster cornutus_, Dismal-swamp Fish. 116 _Typhlichthys subterraneus_, Blind Cavefish. 116 _Anableps dovii_, Four-eyed Fish. 117 _Ipnops murrayi._ 118 _Boleophthalmus chinensis_, Pond-skipper. 118 _Lampetra wilderi_, Brook Lamprey. 120 _Branchiostoma lanceolatum_, European Lancelet. 120 _Pseudupeneus maculatus_, Goatfish. 122 _Xiphophorus helleri_, Sword-tail Minnow. 124 _Cymatogaster aggregatus_, White Surf-fish, Viviparous, with Young. 125 _Goodea luitpoldi_, a Viviparous Fish. 126 Egg of _Callorhynchus antarcticus_, the Bottle-nosed Chimæra. 127 Egg of the Hagfish, _Myxine limosa_. 127 Egg of Port Jackson Shark, _Heterodontus philippi_. 128 Development of Sea-bass, _Centropristes striatus_. 135 _Centropristes striatus_, Sea-bass. 137 _Xiphias gladius_, Young Sword-fish. 139 _Xiphias gladius_, Sword-fish. 139 Larva of the Sail-fish, _Istiophorus_, Very Young. 140 Larva of Brook Lamprey, _Lampetra wilderi_, before Transformation. 140 _Anguilla chrisypa_, Common Eel. 140 Larva of Common Eel, _Anguilla chrisypa_, called _Leptocephalus grassii_. 141 Larva of Sturgeon, _Acipenser sturio_. 141 Larva of _Chætodon sedentarius_. 142 _Chætodon capistratus_, Butterfly-fish. 142