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

 Nigg, Aberdeen. By T. Wemyss Fulton, M.D., F.R.S E., 

 Scientific Superintendent. (Plates VI. -VII), . . L08 



V. On the Specific Characters of Gadus luscus, Gadus minutus, and 

 Gadus esmarkii. By H. Chas. Williamson, M.A., D.Sc. 

 (Plates VIII. -X.), 116 



Introduction, . . . . . .116 



List of Body Dimensions, . . . .111) 



List of Enumeration Characters, . . . 121 



Discussion of tUe Averages, .... 121 



The Numbers of Fin-Rays, . . . .126 



The Numbers of Vertebrae, .... 129 



The Reproduction of the Three Species, . . 130 



The Skulls of the Three Species, . . . 131 



General Comparison between the Three Species, . 183 

 A Specific Description, ..... .135 



VI. On the Tay Sprat Fishery, 1905-1906. By John Fletcher, . 159 



VII. On the Spawning of the Lumpsucker (Gyclopterus lumpus) and 

 the Paternal Guardianship of the Eggs. By T. Wemyss 

 Fulton, M.D., F.R.S.E. (Plate XI.) . . 169 



VIII. On the Rate of Growth of Fishes. By T. Wemvss Fulton, 



M.D., F.R.S.E. (Plates XII., XIII.), . . . 179 



Introduction, ...... 179 



Species dealt with, .... 179 



Methods, . . . . . .180 



Comparison between Different Species, . . 180 



Influence of External Conditions, . . 181 

 A Law of Growth, . . . . .182 



Plaice (PleAironectes platessa), .... 184 



Common Dab (P. limanda), .... 189 



Flounder (P. flesus), . . . .191 



Lemon Dab (P. microcephalus), . . . 192 



Long Rough Dab (Drepanopsetta platessoides), . . 196 



Turbot (Rhombus (Bothus) maxim us), . . . 199 



Brill (Rhombus Icevis), ..... 203 



Cod (Gadus callarias), ..... 209 



Haddock (G. ceglefinus), .... 226 



Whiting (G. merlangus), .... 229 



Grey Gurnard (Trigla gurnardus), . . . 232 



Tables of Measurements, I. -XXV., . . . 243 



IX. Notes on New and Rare Copepoda from the Scottish Seas. By 



Thomas Scott, LL.D., F.L.S. (Plate XIV.), . . 275 



X. On the Spawning and Fecundity of the Plaice (Pleuro)iectes 

 platessa). By T. Wemyss Fulton, M.D., F.R.S.E., 

 Superintendent of Scientific Investigations, . 281 



XI. On Two Cases of Hermaphroditism in the Cod (Gadus callarias). 



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

 Aberdeen. (Plates XV., XVI.), . . . .21)0 



