The Salmon Family.—Coregonus, the Whitefish.—Argyrosomus, the Lake 61 Herring.—Brachymystax and Stenodus, the Inconnus.—Oncorhynchus, the Quinnat Salmon.—The Parent-stream Theory.—The Jadgeska Hatchery.—Salmon-packing. CHAPTER V. SALMONIDÆ (_Continued_). Salmo, the Trout and Atlantic Salmon.—The Atlantic Salmon.—The 89 Ouananiche.—The Black-spotted Trout.—The Trout of Western America.—Cutthroat or Red-throated Trout.—Hucho, the Huchen.— Salvelinus, the Charr.—Cristivomer, the Great Lake Trout.—The Ayu, or Sweetfish.—Cormorant-fishing.—Fossil Salmonidæ. CHAPTER VI. THE GRAYLING AND THE SMELT. The Grayling, or Thymallidæ.—The Argentinidæ.—The Microstomidæ.— 120 The Salangidæ, or Icefishes.—The Haplochitonidæ.—Stomiatidæ.— Suborder Iniomi, the Lantern-fishes.—Aulopidæ.—The Lizard-fishes.—Ipnopidæ.—Rondeletiidæ.—Myctophidæ.— Chirothricidæ.—Maurolicidæ.—The Lancet-fishes.—The Sternoptychidæ.—Order Lyopomi. CHAPTER VII. THE APODES, OR EEL-LIKE FISHES. The Eels.—Order Symbranchia.—Order Apodes, or True Eels.—Suborder 139 Archencheli.—Suborder Enchelycephali.—Family Anguillidæ.— Reproduction of the Eel.—Food of the Eel.—Larva of the Eel.— Species of Eels.—Pug-nosed Eels.—Conger-eels.—The Snake-eels.— Suborder Colocephali, or Morays.—Family Moringuidæ.—Order Carencheli, the Long-necked Eels.—Order Lyomeri or Gulpers.— Order Heteromi. CHAPTER VIII. SERIES OSTARIOPHYSI. Ostariophysi.—The Heterognathi.—The Eventognathi.—The Cyprinidæ.— 159 Species of Dace and Shiner.—Chubs of the Pacific Slope.—The Carp and Goldfish.—The Catostomidæ.—Fossil Cyprinidæ.—The Loaches. CHAPTER IX. THE NEMATOGNATHI, OR CATFISHES. The Nematognathi.—Families of Nematognathi.—The Siluridæ.—The Sea 177 Catfish.—The Channel Cats.—Horned Pout.—The Mad-toms.—The Old World Catfishes.—The Sisoridæ.—The Plotosidæ.—The Chlariidæ.—The Hypophthalmidæ or Pygidiidæ.—The Loricariidæ.—The Callichthyidæ.—Fossil Catfishes.—Order Gymnonoti. CHAPTER X. THE SCYPHOPHORI, HAPLOMI, AND XENOMI. Order Scyphophori.—The Mormyridæ.—The Haplomi.—The Pikes.—The Mud 188 minnows.—The Killifishes.—Amblyopsidæ.—Kneriidæ, etc.—The Galaxiidæ.—Order Xenomi. CHAPTER XI. ACANTHOPTERYGII; SYNENTOGNATHI. Order Acanthopterygii, the Spiny-rayed Fishes.—Suborder 208 Synentognathi.—The Garfishes: Belonidæ.—The Flying-fishes: Exocœtidæ. CHAPTER XII. PERCESOCES AND RHEGNOPTERI.