CONTENTS. 



PAGE 



General Statement, ....... 5 



Trawling Investigations, .... 6 



The Hatching and Rearing of Food-Fishes, ... 7 



The Growth and Age of Fishes, .... 8 



The Life-History of the Lobster, .... 10 



The Parasites of Fishes, ...... 10 



The Marine Crustacea, ...... 11 



The Tay Sprat Fishery, ..... 11 



The Young of the Conger, . . . . .11 



The Spawning of the Cod in Autumn in the North Sea, . 11 



Investigations on the Herring in the Firth of Clyde, . . 12 

 General Index to the Scientific Reports, . . .12 



SCIENTIFIC REPORTS. 



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



Scientific Superintendent, . . , 13 



II. A Contribution to the Life-History of the Lobster (Homarus 



vulgaris). By H. Chas. Williamson, M.A., D.Sc, Marine 

 Laboratory, Aberdeen (Plates* I. -TV.), . . .65 



Experiments in Lobster-Culture, . . .65 



The Rearing of Lobsters, . . . .68 



The LarVal Stages, ..... 73 



History of the Adult Lobster after the Eggs had 



Hatched, ...... 84 



Proportion of Berried Hens in the Catch of Lobsters, . 88 

 The Casting of the Lobster, . . . .89 



The Rate of Growth, ..... 95 



The Behaviour of the Lobster, . . .95 



Examination of the Ovary, . . . .98 



Spawning, ...... 100 



Hatching, ...... 103 



Literature, ...... 104 



Description of Plates, ..... 106 



III. Observations on some Parasites of Fishes New or Rare in 



Scottish Waters. By Thomas Scott, LL.D., F.L.S., etc. 



(Plates' V. and VI.), . . . . .108 



Preliminary Note, . . . . .108 



Part I. Copepoda Parasita, .... 108 

 Part II. Trematoda, . . . . .115 



IV. Report on the Operations at the Marine Hatchery, Bay of Nigg, 



Aberdeen, in 1904. By Dr. T. Wemyss Fulton, F.R.S.E.,. 

 Scientific Superintendent, ..... 120 



V. Zones of Growth in the Skeletal Structures of Gadidre and 

 Pleuronectidre. By J. T. Cunningham, M.A., F.Z.S. 



(Plates'*VII.-TX.), 125 



1. Previous Investigations, .... 125 



2. General Description of Lines of Growth, . . 128 

 Literature, ...... 139 



Description of Plates, , 139 



