INSTRUCTION. n 
tine; No 11, tlie teeth in the tongue, and ]^o. 12 those 
on the roof of the mouth, or vomerine. The trout the 
writer has examined had no visible teeth on the roof of 
the mouth ; they had either suffered from toothache 
in early life, and applying to a piscatorial dentist, had 
them drawn, or the teeth had slipped down and settled 
round their throats as the writer has already mentioned. 
The reader, therefore, if he wishes to ascertain the 
scientific designation of a fish, should in the first place 
determine the number and location of the fins, the num- 
ber and quality, as soft or hard, of the rays, the number 
of gill-rays, the characteristics and position of the teeth, 
the formation of the gill-cover, and lastly, as every num- 
scull, the drawing teachers assure ns, wdio can write can 
draw, a drawing of the fish, or at least an outline, 
should be made. The latter can be done simply by 
laying the specimen on a sheet of paper, spreading out 
his fins and running a pencil round him. And then the 
would-be naturalist will ascertain whether or not he 
belongs to a class so very liberal as to include salmon 
and smelt in the same category. He must not forget 
that it is much more important to study the nature, 
habits and food of the denizens of the water than to store 
his memory with their names,'' for our philosophers hith- 
erto, instead of studying their nature, have been em- 
ployed in increasing their catalogues, and the reader, 
instead of observations or facts, is presented with a long 
list of names that disgust him with their barren super- 
fluity." 
