CONTENTS. 



General Statement, .... 

 Trawling Investigations, . 



Investigations on the Rate of Growth of Fishes 

 The Hatching and Rearing of Food-Fishes, 

 The Life-History of the Crab, 

 The Young of the Witch Sole, 

 The Marine Crustacea, 

 The Parasites of Fishes, . 

 The Young of the Conger, 

 . Investigations on the Herring in the Firth of C 



yde. 



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SCIENTIFIC REPORTS. 



Trawling Investigations. By Dr. T. Wemyss Fulton, F.R.S.E., 



Superintendent of Scientific Investigations, . . 13 



Introductory, ...... 13 



The Proportion of Marketable to Unmarketable Fishes, 13 



The Proportion of Immature Fish Landed, . . 16 



Investigations in the Moray Firth and Aberdeen Bay, 19 



Table!, 50 



Table IL, 89 



II. Contributions to the Life-Histories of the Edible Crab (Cancer 

 Pagurus) and of other Decajsod Crustacea : — Impregna- 

 tion : Spawning : Casting : Distribution : Rate of Growth. 

 By H. Chas. Williamson, M.A., D.Sc, Marine Laboratory, 

 Aberdeen (Plates I.-V.), 



The Impregnation of Cancer pagurus, 



The Muscular System of the Abdomen of the 



Male Crab, 

 The Action of the Penis, . 

 The Condition of the Sperniatheca, 

 The Impregnation of Carcinns mcenas, 

 The Spawning of Cancer pagurus, 



The Mode of Attachment of the Eggs to the 



Swimmeret, 

 The Swimmeret, 

 The Endopodite, 

 The Exopodite, 

 The Ripe Egg, 

 The Attachment of the Eggs, 

 The Sloughing of the Empty Egg-capsules, 

 The Attachment of the Eggs in other Decapod 



Crustacea, . 



The Spawning of Carcinus mctnas, 



The Casting, Distribution, and Rate of Growth of 



Cancer pagurus, ..... 



The Migrations of Cancer pagurus. 



The Changes in the Carapace of Cancer pagurus, 



Literature, ...... 



Explanation of the Plates, . . . . 



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