AND THE FISH THEREOF. 39 



40 coming under the denomination of prime, whereas 60 are only con- 

 sumed by the poor ; the rest are absolutely worthless, excepting- as manure, 

 although many are of surprising beauty in form and colour. 



Amongst the fresh-water fishes, only the Trout, Pike, Shad, Eel, 

 Sturgeon, and Lamprey have any value, commercially speaking, and, of the 

 invertebrates, 10 crustaceans and 30 mollusks. 



Note. — The Italian fauna of both seas (Mediterranean and Adriatic) 

 comprises about 570 species of fishes, of which 74 species are fresh-water 

 fishes. 



