xfl CONTENTS. 



PAGE 



tion — Modes of producing it — Tlie JN^ucleus of the Yorti- 

 cella — Methods of Eeprodiiction — Ciliated Protozoa — 

 AT heel-bearers or Rotifers — Their Structure — The Common 

 Eotifer — The young Rotifer seen inside the old one — An 

 Internal Nursery — "Differentiation" and "Specialization" — 

 Bisexuality of Rotifers — Their Zoological Position — Diver- 

 sities in their Appearance — Structure of their Gizzard — 

 Description of Rotifers. ....... 15 



CHAPTER III. 



FEBRUARY. 



'\^isit to Hampstead — Small Ponds — Water-Fleas — Water- 

 Beetle — Snails — Polyps — Hydra viridis — The DijDping- 

 tube — A Glass Cell — The Hydra and its Prey — Chydorus 

 Spha^ricus and Canthocamptus, or Friends and their 

 Escapes — Cothurnia — Polyp Buds — Catching Polyps — Mode 

 of Viewing Them — Structure of Polyps — Sarcode — Polyps 

 Stimulated by Light — Are they Conscious? — Tentacles and 

 Poison Threads — Paramecium ■ — Trachelius — Motions of 

 Animalcules, whether Automatic or directed by a Will — 

 Their Restless Character 41 



CHAPTER IV. 



MARCH. 



Paramecia — Effects of Sunlight — Pterodina patina — Curious 

 Tail — Use of a Compressorium — Internal Structure of 

 Pterodina— Metopidia—Trichodina pediculus— Cothurnia — 

 Salpina — Its Three-sided Box — Protrusion of its Gizzard 

 Mouth 



