4 



Contents. 



PAGE 



II. On Sea-Fish Hatching. The Loch Fyne Experiments with 

 Plaice. By Dr. T. Wemyss Fulton, Scientific Superin- 



tendent. (Plate II.), . . . .40 



Introduction, . . . . . .40 



The Sea-Fish Hatchery of the Fishery Board, . 41 



The Principles of Sea-Fish Hatching, . . .42 



Proofs of Results, . . . . .4(5 



The Acclimatisation of the Shad in the Pacific, . 48 



Special Statistics, . . . . .49 



Special Investigations, . . . . .51 



The Experiments with Plaice in Lochfyne, . . 52 

 The Results, ...... 56 



Discussion of Results, . . . . .59 



III. Some Notes on Fish Parasites. By Thomas Scott, LL.D., F.L.S. 



(Plates III. -VII.), 73 



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

 Nigg, Aberdeen, in 1907. By Dr. T. Wemyss Fulton, 

 F.R.S.E., Scientific Superintendent, . . .93 



V. On the Specific Characters of the Haddock (Gadus JEglefinus, 

 Linn.), Whiting (Gadus Merlangus, Linn.) ; Gadus 

 Poutassou, Risso ; Gadus Argenteus, Guichenot ; Gadus 



Saida, Lepechin ; Gadus Ogac, Richardson ; Gadus Navaga, 

 Kolreuter ; with a Key to the Species of Gadus found in 

 Northern Waters. By H. Chas. Williamson, M.A., D.Sc, 

 F.R.S.E., Marine Laboratory, Aberdeen. (Plates VIII.- 

 XIII.), 97 



Introduction, ...... 97 



The Fishes Examined, . . . . .97 



External Characters — Body-Dimensions, . . 98 



Enumeration Characters, . . . .99 



Table showing the Measurements as Percentages of 



the Length of the Fish, . . . .100 



Table showing the numbers of Vertebra?, Fin-rays, 



and Pyloric Creca in the different species, . 105 



Key, Ill 



The Skulls, etc., . . . . .120 



Diagnostic Value of certain Bones, . . . 123 



The Diagnosis of Isolated Bones, . . . 123 



The Rib (Pleurapophysis), . . . .124 



Notes on the Species, ..... 125 



Literature, ...... 130 



Letters used in the Plates, .... 131 



Explanation of the Plates. .... 132 



