TABLE OF CONTENTS. 



PAGES 



Chapter I. Protoplasm and the Cell 1-13 



Compositiou of Protoplasm, pp. 1-3. Stnicture of the Cell, 

 pp. 4-8. Cell-division, pp. 9-13. Literature, p. 13. 



Chapter II. The Subkingdom Protozoa 13-40 



The Class Rhizopoda, pp. 14^34. The Class Sporozoa, pp. 24r- 

 38. The Class Flagellata, pp. 28-33. The Class Infusoria, 

 pp. 33-38. Synoptical Classification, pp. 38, 39. Literature, 

 pp. 39, 40. 



Chapter III. The Subkingdom Mbtazoa 41-63 



Individuality of the Metazoa, pp. 41-43. Sexual Reproduction, 

 pp. 43-51. The Segmentation and Early Development of 

 the Ovum, pp. 51-58. Non-sexual Reproduction of the . 

 Metazoa, pp. 58-60. Alternation of Generations, pp fi<^ 63. 

 Literature, p. 63. 



Chapter IV. Trichoplax, the DiCTEMiDiE and the 



Orthonectida 63-67 



Trichoplax, pp. 63, 64. The Dicyemidse, pp. 64, 65. The Or- 

 thonectida, pp. 65-67. Literature, p. 67. 



Chapter V. The Type Ccelbntera 68-119 



The Subtype Porifera, pp. 69-76. The Subtype Cnidaria, pp. 

 76-115. The Class Hydromedusae, pp. 78-97. The Class 

 Scyphomedusse, pp. 97-104. The Class Anthozoa. pp. 104- 

 115. Synoptical Classification, pp. 115-117. Literature, 

 pp. 118, 119. 



Chapter VI. The Ctenophora 130-136 



Description of the Group, pp. 120-136. Synoptical Classifica- 

 tion, p. 126. Literature, p. 136. 



V 



