CONTENTS. X> 



Page 

 The Common and Great Lake Trout — Varieties of tho 



Former 230 



Mignition of the Siilmon — Salmon Fishery near Colerainc 237 



Growth of the Salmon — Change in its Jlarkings 238 



Tlie Pike — its Voracity — Value — Longevity 239 



Tlie Carp — " Gold and Silver Fishes " — Bream 240 



Order AcANTnorrERYcn (Fins with Spiny Eaj-s) 241 



The Wrasse — Fishing Frog — Gobies and lilennies 241 



The Mullet — Grey Mullet of I'.elfast Bay 242 



Iviband-sliaped P'ishes — Ked-band Fish 242 



Pilot Fish — Tunny — its High Temperature 243 



Mackerel — Gurnards 244 



Perch — its former Value — its Habits 945 



Lepidosiren — Is it a Reptile or a Fish? — its Habits 246 



Fossil Fishes — their Arrangement in Four Primary Groups 

 — Singular Forms and Covering of the Fossil Fishes of 

 the Old Red Sandstone 246 



Note. — On the Improvement of Fisheries and the Educa- 

 tion of Fishermen 247 



CLASS II — REPTILIA— REPTILES. 



Characteristics of the Class — Variety of Form and Structure 249 



Number of Species — Their Division into Four Orders 249 



Geographical Distribution — Why Reptiles are Cold-blooded 250 



OnDER I. — AjrpiiiBiA — Amphibious Reptiles 251 



Consist of Two Groups — The Axolotl 252 



The Common Frog — Its Metamorphoses — Food 253 



Tree Frogs — Respiration — Torpidity — The Common Toad 254 



Metamorpliosis of the Newts — Their Carnivorous Habits... 255 

 Errors respecting the Toad — Footprints of Gigantic Batra- 



chian Reptiles 256 



OitDEu IL — Ophidia — Serpents 258 



Their Flexibility — Number of Species — Distribution 259 



Boa-Constrictor — Jaws of the Snake — Poison Fangs of 



Rattle-snake ". 260 



Egj'ptian Xaja — The Cobra-di-Capello — Anecdote of one 261 

 Incubation observed in a Serpent — Former Existence of 



Pythons and Boa-Constrictors in Kngland 262 



English Adder and Common Snakc^ Habits — Movements 263 

 Supposed virtues of tlie flesli— Blind Worm — Altitude at 



which some are found 264 



A 2 



