LIST OF ILLUSTRATIONS. 



PAGE 



Diagrammatic Figures of Perch and Trout .... 8 



Sea Lamprey 9 



Mouth and Suctorial Disc of Sea Lamprey and Lampern 9 



Sturgeon 10 



Salmon Parr and Young Trout ... .... 12 



Scale of Salmon 13 



Lough Melvin Char 15 



Lochmaben Vendace 16 



Shannon Pollan 17 



Heads of Houting and Schelly 17 



Twaite Shad 19 



Anterior Branchial Arch of Twaite Shad and Allis 



Shad 19 



Metamorphosis of Eel 21 



Pharyngeals of Chub 22 



Scale of Rudd 23 



Crucian Carp 25 



Minnow 26 



Chub 27 



Dace 27 



Roach 28 



Rudd 29 



Bream 30 



Ruffe 33 



