ZOOLOGICAL SPECIES 
PLACED UNDER AN ALPHABETICAL ARRANGE~ 
MENT OF THE GENERIC NAMES. 
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Directions. After having found the generic name of 
an animal in the foregoing system of genera, find the 
same name here by seeking its alphabetical place. ‘The 
numbers of the class and order stand at the left of the 
name, and the number of species contained in the genus 
at the right. The description of one species will be found 
under each genus, and in some cases, a considerable 
number. 
If the specimen under examination is not described 
{and not one twentieth of all known species are described 
in this text-bovk): find the same genus in Rees’ Cycle- 
pedia, Turton’s Linneus, Shaw’s Zoology, or in what- 
ever system comes first to hand. There look out the 
species. Write the name, and copy the specific charac- 
ter into the blank leaves, which should be bound up with 
this text-book at the end. Saving paged the blank 
leaves, make a reference to the page wherein the spe- 
cies is copied, immediately under the printed descrip- 
tion of the last species. By this method the student will 
have a description of his collection, arranged in a man- 
ner to be as accessible as if it were all in print. 
By pursuing this course a few seasons, each student 
will be able to contribute considerably towards a system 
of American Zoology. At present but a small propor- 
tion of American animals, excepting those of a large 
size, have been sought out. Insects, in particular, are 
but little known. And sees Mr. Say is doing much 3 
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