Viil Contents 
CHAPTER XV. 
THE HOLOCEPHALI, OR CHIMARAS. 
PAGE 
The Chimeras.—Relationship of Chimazras.—Family Chimeride#.—Rhino- 
chimiridze:—Ostracophorinn ou. e.< «> os s10/e.winielaiel ele bettie eet iainis Site iets 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.— 
Whe Polypteri dees... isis /ox.1- sco. 60 at ieee ete tate eee eee 224 
CHAPTER XVII. 
SUBCLASS DIPNEUSTI, OR LUNGFISHES. 
The Lungfishes.—Classification of Dipnoans.—Order Ctenodipterini.— 
Order Sirenoidei—Family Ceratodontide.—Lepidosirenide.—Kerr on 
the Habits of Lepidosiren.—Arthrodires.—Cycli@................++- 235 
CHAPTER XVIII. 
THE GANOIDS. 
Subclass Actinopteri.—The Series Ganoidei.—Classification of Ganoids.— 
Order Lysopteri.—The Paleoniscide.—The Platysomida.—The Doryp- 
teride. —The Dictyopygide.—Order Chondrostei.—Order Selachostomi: 
the Paddle-fishes—Order Pycnodonti.—Order Lepidostei—Family 
Lepidosteide.—The Bowfins: Amiide................eceeeescaeees 246 
CHAPTER XIX. 
ISOSPONDYLI. 
The Subclass Teleostei, or Bony Fishes.—Order Isospondyli—The Classifi- 
cation of the Bony Fishes.—Relationships of Jsospondyli—The Clu- 
peoides.— The Leptolepide.— The Elopide.—The Albulide.— The 
Chanide.—The Hiodontide.—The Pterothrissida.—The Ctenothrissi- 
de.—The Notopteride.—The Clupeide.—The Dorosomatidae.—The 
Engraulidide.— Gonorhynchidea.— The Osteoglosside.— The Panto- 
Gontide, ... «:s.9\g enslave ameerabereetsteeantnta mee Sletnna areata oleae ebere tatety amas. chur» 264 
CHAPTER XX. 
SALMONID. 
The Salmon Family.—Coregonus, the Whitefish.—Argyrosomus, the Lake 
Herring.—Brachymystax and Stenodus, the Inconnus.—Oncorhynchus, 
