4 



Part III. — Twenty-first Annual Report 



Ling {Molua molva), . . . . .62 



Hake (Merluccius vulgaris), . . . .62 



Tusk {Brosmius brosme), . . . . .63 



Cat-fish {Anarrhichas lup^is), . . . .63 



Ilei ling (Cl'upea harengus), . . . .65 



Sprat (0. sprattuif), . . . . .67 



Mackerel {Scomhey scombrus), . . . . 68 



Lesser Weever {Trachinus vipera), . . * 69 



Pogge or Armed-Bullhead {Agonus cataphradus), . 74 



II. On some New and Rare Crustacea collected at various times in 

 connection with the Investigations of the Fishery Board 

 for Scotland. By Thomas Scott, LL.D., F.L.S., Member 

 Zool. Soc. de France (Plates II.- VL), . . .109 



III. On the Larval and Early Young Stages, and Rate of Growth, 



of the Shore Crab (Carcmus mainas), Leach. By H. Chas. 

 Williamson, M.A., D.Sc, Marine Laboratory, Bay of Nigg, 

 Aberdeen (Plates Y II. -XIII.), . . . .136 



Introduction, . . . . . . .136 



The Hatching Period : the occurrence of the Zoea, . 137 

 The Larval Stages, . . . . .139 



The Larval Characters, ..... 140 



Development of the Appendages — 



Antennule, ...... 142 



Antenna, ...... 144 



Mandible, . . . . . .145 



First Maxilla, ..... 145 



Second Maxilla, ..... 146 



Maxillipedes, ..... 147 



Third Maxillipede, and Pereiopods, . . 150 



Branchiae, ...... 155 



Abdomen, Telson, Pleopods, . . . 156 



External Sexual Characters, . . . 160 



The Eye, . . . . . .160 



Carapace, ....... 161 



Thorax, . . . . . . . 162 



Sizes of the different Stages, .... 162 



The Rate of Growth, . . . . .163 



Literature, ...... 174 



Explanation of Plates, ..... 175 



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



Nigg, 1902. By Dr. T. Wemyss Fulton, . . .180 



V. The Distribution, Growth, and Food of the Angler (Lophius 

 piscatorius). By Dr. T. Wemyss Fulton, F.R.S.E., 

 Scientific Superintendent, ..... 186 



VI. Some further observations on the Food of Fishes, with a note 

 on the Food observed in the Stomach of a Common 

 Porpoise. By Thomas Scott, LL.D., F.L.S., . . 218 



