CONTENTS. 



CHAPTER I. 



AX UNSEEN WORLD. 



PACl. 



Astonishment at early Disclosures of Microscope. Extraordinary 

 Number and Minuteness of Living Beings it Revealed. Impetus 

 given to Microscopical Research by M. Trembley's Memoir on the 

 Hydra. Infusoria. Ehrenberg's great Work on. Polygastrica 

 and Jtctatoria. Feeding the Animalcules. Discovery of Errors. 

 Classification at Fault. Border-land of Organic World. Monads. 

 Fish Animalcules. Composite Forms. Volvox Globator. 

 Desmids and Diatoms. Infusorial Earths. Protophyta and Pro- 

 tozoa. Amoeba. Actinophrys. Foraminifera. Bell Animal- 

 cules. Stentors. Microscopic Swans. Rotifera. Melicerta. Re- 

 vivification. Life in Atmosphere. Wide Diffusion of Microscopic 

 Life 1 



CHAPTER II. 

 A DISQUISITION ON JELLY-FISH. 



Familiarity. Popular Names. Abundance. Character of Composi- 

 tion. Simplicity of Organization. Rapacity. Pliny on Sea- 

 Nettles. Stinging Powers. A Bathing Companion. Urticating 

 Organs. Medusae. Diversity of Form. British Species. Cy- 

 dippe. Its Elegant Movements. Capture of Food. Tenacity of 

 Life. Transparency. Girdle of Venus. Velella. Floating for a 

 Likeness. Portuguese Man-of-War. Absorption of Food. Veno- 

 mous Powers. A Shipwrecked Fleet. Diphydas. Gemmation. 

 An Elephantine Illustration. Development of Embryos. 

 Polyp. Form of Medusa. Alternation of Generations. Lumi- 

 nosity. Phosphorescence of Sea . .... 



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