X CONTENTS. 



CHAPTEE XIV. 



, PAGE 



Domesticated and Acclimatised Fishes, etc. . . 185 



Domesticated fishes, 185 — Acclimatisation of fishes, 185 — Artificial 

 impregnation of ova, 186^ — Tenacity of life, 186 — Reproduction 

 of lost parts, 188— Hyhernation, 188— Useful fishes, 189— 

 Poisonous fishes, 189 — Poison-organs, 190. 



CHAPTEE XV. 



Distribution of Fishes in time . . . .193 



Oldest fish-remains, 193 — Devonian fishes, 194 — Carboniferous, 

 196— Permian, 197— Triassic, 197— Liassic, 198— Oolitic, 199 

 —Cretaceous, 199— Tertiary, 200— Post-pliocene, 201. 



CHAPTEE XVI. 



The Distribution of existing Fishes over the 



Earth's Surface, — General Eemarks . . 202 



Freshwater-, Marine-, and Brackish-water Fishes, 202 — Changes of 

 the habitat of numerous fishes, active, 203 — or dependent on 

 geological changes, 204 — Agencies operating upon the distri- 

 bution of Freshwater and Marine fishes, 205. 



CHAPTEE XVII. 



The Distribution of Freshwater Fishes . . .208 



List of Freshwater Fishes, 208 — Continuous and interrupted range 

 of distribution, 209 — The ways of dispersal of Freshwater 

 fishes, 211 — A wide range of a type is not necessarily proof of 

 its antiquity, 212— Each fauna is composed of ancient, autoch- 

 thont, and immigrant species, 213 — Division of the globe 

 into zoological regions ; freshwater fishes have been spread in 

 circumpolar zones, 215 — Cyprinidi« and Siluridre, most im- 

 portant families in recognising the zoo-geographical regions, 

 216 — Division of the fauna?, of Freshwater fishes, 217 — L 

 Equatorial Zone, 218 — Indian Region, 220 — African Region, 

 227 — Tropical American or Neotropical Region, 233 — Tropical 

 Pacific Region, 238 — II. Northern Zone, 240 — Europo-Asiatic 

 or Palajarctic Region, 243 — North American or Nearctic 

 Region, 246 — III. Southern Zone, with Tasmanian, New 

 Zealand, and Fuegian Sub-regions, 248. 



