CONTENTS. 



PART I.— INVEETEBHATE ANIMALS. 



GENERAL INTRODUCTION. 



FAQH 



Dennition 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 

 — ClassiKcation — 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, 1-43 



■ CHAPTER I. 



General characters of the Protozoa— Classification of the Protozoa — 



Gregarinidse — Psorospermise 44-48 



CHAPTER II. 

 General characters of the Rhizopoda — Monera — Amoebea, . . 48-52 



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, 53-60 



CHAPTER IV. 

 Radiolaria — Acanthometrse — Polycystina — ThalassicoUida, . 61-63 



CHAPTER V. 



Sponges — Nature of Sponges — Classification of Spongida — Distribu- 

 tion of Sponges in space and in time — Affinities of Sponges, 63-70 



