XXIX.--CLASSIFICATION OF ANIMALS
XXX.--MAMMALIA (_Mammals_)
XXXI.--MAMMALIA. (_Mammals_)--_continued_
XXXII.--MAMMALIA--_continued_
XXXIII.--MAMMALIA--_continued_
XXXIV.--AVES. (_Birds_)
XXXV.--REPTILIA. (_Reptiles_)
XXXVI.--PISCES. (_Fishes_)
XXXVII.--INSECTA. (_Insects_)
XXXVIII.--CRUSTACEA--MOLLUSKA. (_Crustaceans and Mollusks_)
XXXIX.--VERMES--ZOOPHYTA. (_Worms and Zoophytes_)
XL.--THE NOURISHMENT OF PLANTS
CONCLUSION