Contents. xi 



CHAPTER X. 



OCTOBER. 



PAGE 



Stentors and Steplianoceri — Desci-iption of Stcntors — 

 Mode of viewing tliem — Their Abundance— Social 

 Habits — Solitary Stentors living in Gelatinous Caves — 

 Propagation by Divers Modes — Cepbalosiphon lininias — 

 A Group of Yaginicolse — Changes of Shape — A Bubble- 

 blowing Yoi-ticella 107 



CHAPTER XI. 



NOVEMBER. 



Characteristics of the Polyzoa — Details of Structure ac- 

 cording to AUman — Plumatella repens — Its Great 

 Beauty under proper Illumination — Its Tentacles and 

 their Cilia — The Mouth and its Guard or Epistome — 

 Intestinal Tube — How it swallowed a Rotifer, and what 

 happened — Curiosities of Digestion — Are the Tentacles 

 capable of Stinging ? — Resting Eggs, or " Statoblasts " 

 — Tube of Plumatella — Its Muscular Fibres — Physiolo- 

 gical Importance of theii* Structure . . . .118 



CHAPTER XII. 



DECEMBER. 



Microscopic Hunting in "Winter — Water-Bears, or Tardi- 

 grada — Their Comical Behaviour — Mode of viewing 

 them — Singular Gizzard — Wenham's Compressorium — 

 Achromatic Condenser— Mouth of the Water-Bear — 

 Water-Bears' Exposure to Heat — Soluble Albumen — 

 Physiological and Chemical Reasons why they are not 



