INDEX. 



I6 3 



Protein e, 67. 



Proteus-animalcule, 28. 



Prothallus, of ferns, 124, 125. 



Protococcus, 20. 



Protophyta, 20. 



Protoplasm, 6, 7; connection of, with 



life, 8 ; living and dead, 10; nature of, 



71 ; movements of, 71. 

 Protozoa, 20, 28 ; definition of, 35. 

 Provisional larvae, 92. 

 Provisional organs, 91. 

 Proximate compounds, 66. 

 Pseudova, 114. 

 Pteropods, relations of, to Gasteropoda, 



94. 



RACE, definition of, 59. 



Regnum Protisticurn, 19. 



Relation, functions of, 27. 



Relations between nutritive and genera- 

 tive functions, 117, 118. 



Representative forms, 51. 



Reproduction, 27, 97, 126; sexual, 97; 

 non-sexual, 98 ; of lost parts, 98 ; by 

 gemmation and fission, 98-103 ; rela- 

 tions of, to nutrition. 117 ; of plants. 

 119-126. 



Reptilia, 41. 



Retrograde development, 95. 



Bhizopoda, 35. 



Rotifera, tenacity of life of, 15. 



Scolecida, 38. 



Sea-anemone, 30. 



Sea-mat, 20, 100. 



Selection, natural, 137; sexual, 137-139. 



Sexual reproduction, 97. 



Sexual selection, 137-139. 



Sloths, 145. 



Special creation of species, doctrine of, 



135. 

 Specialisation of functions, 28-33, 78. 



Species, definition of. 57-61 : origin of, 



134-143. 



Specific centres, 135. 

 Sponges, 20. 



Spontaneous generation, 127-133. 

 Starch, 21, 68. 

 Statoblasts, 103. 

 Stentor, chlorophyll in, 22. 

 Sub - kingdoms, 34-62; definitions of, 



35-42. 



TEMPERATURE, as a condition of life, 



14. 



Thallophyta, 42. 

 Transformation, 89, 90. 

 Trimorphic plants, 60. 

 Trophozome, 107, 120. 

 Tunicata, 39. 



UNICELLULAR plants, 72, 78. 



VARIETY, definition of, 59. 



Vaueheria, 20, 21. 



Vegetative functions, 27, 77. 



Vegetative repetition, 47, 99. 



Vertebrata, 34, 48 ; definition of, 41. 



Vibriones, 14, 128, 133. 



Vital force, 9, 10, 11, 16, 80 ; correlation 



with physical forces, 80-83. 

 Vitality (see Life). 

 Volvox, 21. 

 Von Baer's law of development, 93. 



WATER, as a condition of life, 15. 

 Wheel-animalcules, 15. 



YEAST-PLANT, 72, 78, 79. 



ZOOID, 102. 



Zoological individual, definition of, 102. 



Zoological provinces, 144. 



THE END. 



