FISHERIES CATALOGUE. 217 



A series of fish parasites, both external, such as 

 Caligus, Lernea, Chondracanthus, Anchorella, 

 Pontobdella, and Saprolegnia (the Salmon disease 

 fungus) ; and internal parasites, such as Cestode 

 and Nematode worms. 



A series of the ripe eggs of our chief food fishes. 

 The fishes chosen are as follows : — Sole, Plaice, 

 Witch, Scald fish, Lemon Sole, Dab, Haddock, 

 Gurnard, Cod, Anchovy, and Lumpsucker. With 

 the .exception of the Lumpsucker, whose eggs 

 sink in the water, and are, consequently found 

 on the bottom or attached to sea-weeds, all these 

 fishes' eggs are pelagic, or float at or near the 

 surface of the sea. The small size and trans- 

 parent appearance of most of them will be 

 noticed. 



Specimens of the Sole (Solea vulgaris) and the 

 Solenette (S. lutea) at various stages of growth 

 to show the similarity and the distinction between 

 these two fishes. The only possibility of con- 

 fusion is between the adult Solenette, which never 

 grows larger than four or five inches in length, 

 and the young Sole of about that size (see the 

 specimens in the jars). Besides the occasional 

 black stripes which the Solenette has in its 

 dorsal and ventral fins (each sixth or seventh 

 ray being coloured a deep black), the more sandy 

 colour, the rougher appearance, and a difference 

 in the arrangement of the tags around the mouth, 

 there is also a considerable difference in the 

 scales, as is shown in the figures and description 

 appended to the exhibit. 



