INDEX. 



Abiogenesis, 127; experiments of Bas- 



tian on, 131-133. 

 Abyssal zone, 147. 

 Acrojence, 42. 

 Actinozoa, 37. 



Air, as a condition of life, 14. 

 Alliumen, 67, 69. 

 Altemation of generations, 104, 112, 



113, 125. 

 Amoeba, 9, 17, 2S, 29, 30. 

 Amphibia, 41. 

 Analogy, 44. 

 Anarthropoda, 3S. 

 Angiosperms, 43 ; reproduction of, 124- 



126. 

 Animal functions, 27, 77. 

 Animals, form of, 20; internal structure 



of, 21 ; chemical composition of, 21 ; 



motor power of, 22; food of, 23; re- 

 spiration of, 24. 

 Animals and plants, differences between, 



19-25. 

 Annelida, 3S. 



Annuloida, 34; definition of, 37. 

 Annulosa, 3i; definition of, 33. 

 Anophyta, 42. 



Aphides, parthenogenesis of, 114, 115. 

 Arachnida, 39. 

 Armadillos, 145, 

 Arthropoda, 39. 

 Ascidians, cellulose in, 21. 

 As.similation, 2, So. 

 Atrophy, 88. 



Bacteria, 14, 128, 132. 

 Bathybius, 24. 



Bathyraetrical distribution, 146. 

 Bees, parthenogenesis of, 115, 116. 

 Biology, definition of, 1. 

 Bioplasm, 7, 70; nature of, 71; move- 

 ments of, 71. 

 Brachiopoda, 30. 



Cacti, 51. 



Campanularia, 107. 

 Caseine, 67, 69. 



Cells, 72; wall of, 73; contents of, 74; 



nucleus of, 74 ; multiplication of, 75 ; 



life of, 79. 

 Cellulose, 21, 69. 

 Cephalopoda, 40. 

 Chcetognatha, 39. 

 Chemistry, of living beings, 64, 65; of 



animals, 65, 68; of vegetables, 68, 69. 

 Chlorophyll, 22. 

 Class, definition of, 62. 

 Classification, 66; linear, 62. 

 Clytia, 107. 



Coelenterata, 22, 34 ; definition of, 36. 

 Conditions of life in the deep sea, 147-150. 

 Contemporaneity of strata, 154-156. 

 Continuity, geological, 156-158. 

 Correlation, functions of (see Relation). 

 Correlation of growth, 54, 55. 

 Crustacea, 39. 



Cryptogams, 42; reproduction of, 124. 

 Cytogenesis, 75, 76. 



Darwintan theory, 136, 137; objec- 

 tions to, 139-143. 



Dead bodies, chemical composition of, 

 4; form of, 5; arrangement of parts 

 of, 5, 



Dead and living bodies, differences be- 

 tween, 2. 



Death, 15, 88. 



Deep sea, condition of life in, 147-150. 



Desmids, 22. 



Development, 89, 91 ; Von Baer's law of, 

 93 ; retrograde, 95. 



Diatoms, 22. 



Dicotyledons, 43. 



Dictyogence, 42. 



T)ifferences between different orgauism^, 

 26. 



Diraorphio plants, 60. 



Distribution, 144; in. space, 144; geo- 

 graphical, 144-146 ; b'athjTnetrioal,14tt- 

 150; in time, 151-160. 



EcMnodermata, 37. 

 Edentata, distribution of, 146. 



