CHAPTER III. 



FEBRUARY. 



VISIT TO HAMPSTKAD— SMALL PONDS-WATER-FLEAS— WATER- 

 BEETLE-SNAILS— POLYPS— HYDRA VIRIDIS-THE DIPPING- 

 TUBE— A GLASS CELL— THE HYDRA AND ITS PREY-CHYDORUS 

 SPHiERICUS AND CANTHOCAMPTUS, OR FRIENDS AND THEIR 

 ESCAPES — COTHURNIA — POLYP BUDS — CATCHING POLYPS- 

 MODE OF VIEWING THE^[-STRUCTURE OF POLYPS— SARCODE 

 —POLYPS STIMULATED BY LIGHT— ARE THEY CONSCIOUS?— 

 TENTACLES AND POISON THREADS-PARAMECIUM-TRACHE- 

 LIUS— MOTIONS OF ANIMACULES, WHETHER AUTOMATIC OR 

 DIRECTED BY A WILL— THEIR RESTLESS CHARACTER. 



