The Lungfishes.--Classification of Dipnoans.--Order Ctenodipterini.--Order Sirenoidei.--Family Ceratodontidæ.--Development of Neoceratodus.--Lepidosirenidæ.--Kerr on the Habits of Lepidosiren 609 FOOTNOTES: [1] For most of this list of errata I am indebted to the kindly interest of Dr. B. W. Evermann. LIST OF ILLUSTRATIONS VOL. I. PAGE _Lepomis megalotis_, Long-eared Sunfish 2 _Lepomis megalotis_, Long-eared Sunfish 4 _Eupomotis gibbosus_, Common Sunfish 7 _Ozorthe dictyogramma_, a Japanese Blenny 9 _Eupomotis gibbosus_, Common Sunfish 13 _Monocentris japonicas_, Pine-cone Fish 16 _Diodon hystrix_, Porcupine-fish 17 _Nemichthys avocetta_, Thread-eel 17 _Hippocampus hudsonius_, Sea-horse 17 _Peprilus paru_, Harvest-fish 18 _Lophius litulon_, Anko or Fishing-frog 18 _Epinephelus adscensionis_, Rock-hind or Cabra Mora 20 Scales of _Acanthoessus bronni_ 21 Cycloid Scale 22 _Porichthys porosissimus_, Singing-fish 23 _Apomotis cyanellus_, Blue-green Sunfish 27 _Chiasmodon niger_, Black Swallower 29 Jaws of a Parrot-fish, _Sparisoma aurofrenatum_ 30 _Archosargus probatocephalus_, Sheepshead 31 _Campostoma anomalum_, Stone-roller 33 _Roccus lineatus_, Striped Bass 35 _Roccus lineatus._ Lateral View of Cranium 36 _Roccus lineatus._ Superior View of Cranium 37 _Roccus lineatus._ Inferior View of Cranium 38 _Roccus lineatus_. Posterior View of Cranium 40 _Roccus lineatus._ Face-bones, Shoulder and Pelvic Girdles, and Hyoid Arch 42 Lower Jaw of _Amia calva_, showing Gular Plate 43 _Roccus lineatus._ Branchial Arches 46 Pharyngeal Bone and Teeth of European Chub, _Leuciscus cephalus_ 47 Upper Pharyngeals of Parrot-fish, _Scarus strongylocephalus_ 47 Lower Pharyngeal Teeth of Parrot-fish, _Scarus strongylocephalus_ 47 Pharyngeals of Italian Parrot-fish, _Sparisoma cretense_ 48 _Roccus lineatus_, Vertebral Column and Appendages 48