xvi LIST OF ILLUSTRATIONS 



PAGE 



Fig. 30. Cysts and Mitosis in Actinosphserium . . .144 



,, 31. Plasmodium and Spore Cases of Badhamia . . 149 



32. Free Individuals and Cyst of Monocystis agilis . . 155 



33. Conjugation of Monocystis agilis . . .157 

 ,, 34. Structure and Reproduction of Euglena viridis . . 161 

 ,, 35. Mitosis in Euglena . . . . .167 

 ,, 36. Bodo saltans, Structure, Conjugation, and Spore Forma- 

 tion ....... 170 



,, 37. Polytoma uvella, Structure and Reproduction . . 174 



,, 38. Pandorina morum . . . . .179 



,, 39. Eudorina elegans . . . . .181 



,, 40. Volvox globator . . . . . .183 



,, 41. Paramecium caudatum . . . . . 190 



,, 42. Stages in the Conjugation of Paramecium . . . 197 



,, 43. Diagrams of the Course of Conjugation in Paramecium 



caudatum and Colpidium colpoda . . . 200 



,, 44. Vorticella monilata . . . . . 207 



,, 45. Stages in the Conjugation of Vorticella . . .211 



,, 46. Diagram of the Course of Conjugation in Vorticella 



monilata ...... 213 



,, 47. Hydra fusca and Hydra viridis . . . . ' 222 



,, 48. Longitudinal Sections of Body and Tentacle of Hydra. 



Nematocysts . . . . . . 225 



,, 49. Isolated Cells from Hydra fusca . . t . 229 



50. Development of Hydra ..... 239 



,, 51. Colony, Medusa and Enlarged Bases of Tentacles of 



Obelia geniculata . . * . 242 



,, 52. Longitudinal Section through a hydranth of Obelia 



geniculata . . . . * 244 



,, 53. Development of the Medusa in Podocoryne carnea . 247 



