(aye (BR. ) 
SUMMARY. 
Four hundred and sixty-one genera are des- 
cribed in this text-book. These embrace every 
known species of the Animal kingdom. Lecepede, 
Cuvier and otbers of the French School, have 
subdivided most of these genera, until their list is 
extended to thousands, including their subgenera. 
tn numerous cases they have merely given Greek 
and Latin names tothe Linnean sections of species. 
The student should be told at the outset of his 
course, that all the animals are embraced under 
these 461 genera, which are included in the French 
genera. 
The genera described in this text-book are ar- 
ranged according to the elasses of Cuvier, as fol- 
lows: Under Class 1, are 54 genera—-Class 2, 91 
—Class 3, 16—Class 4, 92—Class 5, 10—Class 
6, 4—Class 7, d—Class 8, 88—Class 9, 48-— 
Class 10, 5—Class 11, 14—Class 12, d—Class 
43, 16—Class 14, 15. Total 461. 
At the commencement of the present century, 
about 21,300 species had been described. [have set 
down the number of species described at that 
iime under each genus, as nearly as it could 
beascertained. ‘Though the number has been en- 
creased several thousands since that time; the 
student may form an estimate of the relative ex- 
tent of each genus, by that number. The genera 
at that time stood thus, under the Linnean classes. 
Class 1, 49 genera—Class 2, 90—Class 3, 12— 
Class 4, 72—Class 5, 123—Class 6, 118. Total 
Ae. 
