PREFACE. IX 



For many interesting papers connected with the Fisheries 

 we have to thank our fellow-workers in the maritime states 

 of the Continent, in America, and the British Colonies. Such 

 have been and will be of great value in these investigations. 



In conclusion, we must express our obligations to the 

 Council of the Royal Institution for the use of the woodcuts 

 illustrating the life-history of a Marine Fish ; to Prof. E. E. 

 Prince, Dominion Commissioner in Fisheries, Canada, for 

 drawings illustrative of the development of a fish in Chap. V : 

 to the Fishery Board for Scotland for many acts of courtesy 

 in these investigations ; to Dr Fulton, their Scientific Super- 

 intendent, for his uniform zeal and energy in promoting the 

 increase of knowledge in his department, and to Mr H. C. 

 Williamson for much information from Italy and Germany. 



W. C. M. 

 A. T. M. 



GATTY MARINE LABORATORY, 

 April, 1897. 



