CONTENTS. 



PABT I.-IJSTVEBTEBRATE ANIMALS. 



GENERAL INTRODUCTION. 



PAGE 



Definition of Biology and Zoology Differences between organised 

 and unorganised bodies Nature of life Vital force Differ- 

 ences between animals and plants Morphology and physiology 

 Differences between different animals Specialisation of func- 

 tions Morphological type Von Baer's law of development 

 Homology, analogy, and homomorphism Correlation of growth 

 Classification Definition of species Impossibility of a linear 

 classification Reproduction Sexual reproduction Non-sexual 

 reproduction Gemmation and fission Reproduction by internal 

 gemmation Alternation of generations Parthenogenesis- De- 

 velopment, transformation, and metamorphosis Spontaneous 

 generation Origin of species Distribution, geographical and 

 geological, 1-41 



CHAPTER I. 



General characters of the Protozoa Classification of the Protozoa 



Gregarinidae Psorospermiae, ...... 42-46 



CHAPTER II. 

 General characters of the Rhizopoda Amcebea, . . . 46-50 



CHAPTER III. 



Foraminifera Classification of the Foraminifera Bathybius Cocco- 

 liths, Coccospheres Affinities of the Foraminifera Distribution 

 of Foraminifera in space Distribution of Foraminifera in time, 50-57 



CHAPTER IV. 

 Radiolaria Acanthometrse Polycystina Thalassicollida, . 57-6o 



CHAPTER V. 



Sponges Nature of Sponges Classification of Spongida Distribu- 

 tion of Sponges in space and in time Affinities of Sponges, 60-65 



