Vili Contents 
CHAPTER XV. 
THE HOLOCEPHALI, OR CHIMARAS. 
PAGE 
The Chimeras.—Relationship of Chimeras.—Family Chimeride.—Rhino- 
Chimerida:—Ostracophortis cick soc acic tis spiel ok aleve ew esdeele euenelaugscuaael soonest 218 
CHAPTER XVI. 
THE CROSSOPTERYGII. 
Class Teleostomi.—Subclass Crossopterygii—Order of Amphibians.—The 
Fins of Crossopterygians.—Orders of Crossopterygians.—Haplistia.— 
Rhipidistia —Megalichthyide.—Order Actinistia——Order Cladistia.— 
‘The Poly pteriday seiodit dacnasu ais dens cisiecia weed Ba eas Bar Aere nace 224 
CHAPTER XVII. 
SUBCLASS DIPNEUSTI, OR LUNGFISHES. 
The Lungfishes.—Classification of Dipnoans.—Order Ctenodipterini— 
Order Sirenoidei.mFamily Ceratodontidae.—Lepidosirenide.—Kerr on 
the Habits of Lepidosiren.—Arthrodires—Cyclia................... 235 
CHAPTER XVIII. 
THE GANOIDS. 
Subclass Actinopteri—The Series Ganoidei.—Classification of Ganoids.— 
Order Lysopteri.—The Palzoniscide.—The Platysomida.—The Doryp- 
terida.—The Dictyopygida.—Order Chondrostei.—Order Selachostomi: 
the Paddle-fishes.—Order Pycnodonti.—Order Lepidostei—Family 
Lepidosteide.—The Bowfins: Amiide.......... 00.0.0 ccc cece eee 246 
CHAPTER XIX. 
ISOSPONDYLI. 
The Subclass Teleostei, or Bony Fishes.—Order Isospondyli.—The Classifi- 
cation of the Bony Fishes.—Relationships of Isospondylii—The Clu- 
peoides. —The Leptolepide.— The Elopide.—The Albulide.— The 
Chanidea.—The Hiodontide—The Pterothrissida.—The Ctenothrissi- 
dz.—The Notopteride.—The Clupeide.—The Dorosomatide.—The 
Engraulidide.— Gonorhynchide.— The Osteoglosside.— The Panto- 
LO TUGT eee ci uae tateosaess) SuapAGINAS Ciotalets nny Neem nase Acie needa nue Oe ope os 264 
CHAPTER XX. 
SALMONID&. 
The Salmon Family.—Coregonus, the Whitefish —Argyrosomus, the Lake | 
Herring.—Brachymystax and Stenodus, the Inconnus.—Oncorhynchus 
