xii CONTENTS. 



CHAPTER VIII. CULTURE OF EELS. 



Probability of eels being of sufficient importance to be cultivated. 

 General remarks on eels. Eel culture at Comacchio P. 219 



CHAPTER IX. CULTURE OF OYSTERS. 



The Oyster. An hermaphrodite. Its fecundity. Its spawn or 

 " spat," and its manner of incubation. Emission of the spat, 

 and its destruction by marine animals. Importance of its find- 

 ing something to fasten to. Places favorable to its growth. 

 Transportation of seed oysters to the north. Growth of the 

 young oyster. Chief object in the culture of oysters. Oyster 

 Culture at Fusaro. Its antiquity. Its progress in France at the 

 Bay of St. Brieuc and the Island of Ree. English and French 

 oysters. Decrease of oysters in Eastern States. Governor 

 Wise's estimate of the area and value of oyster-beds in Vir- 

 ginia ....... 225 



APPENDIX. 



I. NATURAL FOOD OF TROUT . . . 23 ; 



II. MESSRS. MARTIN AND GILLONE'S SYSTEM OF HATCH- 

 ING AND REARING YOUNG SALMON . . 241 



III. CULTURE OF CARP .... 244 



IV. DISCOVERY OF ARTIFICIAL FECUNDATION BY JACOBI 245 

 V. ARTIFICIAL SPAWNING-BEDS . . . 248 



VI. THE GOURAMI. ITS HABITAT, OR NATIVE COUN- 

 TRY ...... 250 



VII. COLD SPRING TROUT-PONDS . . . 264 



VIII. CLOVE SPRING TROUT-PONDS . . . 272 



IX. CULTIVATION OF FUR-BEARING ANIMALS . 274 



X. AMERICAN FISH FOR ENGLISH WATERS . 278 



XI. Dr. J. H. SLACK'S TROUT- BREEDING ESTABLISH- 

 MENT ...... 287 



XII. STEPHEN H. AINSWORTH'S NEW HATCHING-RACE, 



FOR NATURAL PROPAGATION . . 288 



XIII. CRUSTACEA . . . . . 290 



XIV. SALMON HATCHING ESTABLISHMENT ON THE MIRA- 



MICHI . . . 297 



