INDEX. 



125 



Protozoa, 24. 

 psychology, 110. 

 Pteromys, 91. 

 Punnett, R. C., 46, 121. 

 pare lines, 45, 71, 93. 



, 34. 



RANUNCULUS, 109. 

 recessive character, 49. 

 reflex action, H3. 

 regeneration, 24. 

 regression, 73. 

 Reid, A., 69, 121. 

 reproduction, 27, and sequel. 

 -- asexual and sexual, 27. 



- . of cella, 25. 



Reptilia, history of orders, 97. 



SACCUMNA, 59. 



Salamandra, 91. 



Sarasin, 82. 



segregation of factors, 48. 



selection, 70, 73. 



--- ralue, 76, 



Semon, 111. 



sex, 27, and segueL 



- determination of, 59. 

 sexual characters, secondary, 83. 

 -- selection, 84, and sequel. 

 Siphonops, 91. 



soma, 30. 



specialisation, 24, 105, 110. 



species, 92. 



-- elementary, 93. 



Smith, G. W., 59. 



spontaneous generation, 19. 



sterility, 83, 93. 



stimuli, or conditions of environ- 



ment, 16, 37. 

 struggle for existence, 60, 



and 



TARAXACUM, 41, 93. 

 Tower, 58, 69. 

 Trifoliuni pratense, 6?. 

 Trilobites, 107. 

 tropisme, 113. 

 Trypanosoma Brucei, 67 

 Tschermak, 47. 

 Tunicates, 87. 

 Typhlops, 91. 



UNOULATA, It3. 



unit characters, 49, 64. 



factors, 49, 54. 



VARIATION and variability, 33, and 



sequel. 

 continuous and. discontinuous, 



74,93. 



Vaucheria, 24. 

 Verworn, iL, 121. 

 vestigial organs, 89. 

 vitalism, 18. 

 Vries, De, 35, 47, 54, 93, 121. 



WALLACE, A. R., 32, 61, 67, 71, 79. 



86, 121. 



Watson, J., 34, 

 Weismann, 30, 37, 46, 55, 121, 

 Weldon, W. F. R., 34, 69. 

 Wilson, B. B., 59, 121. 



ZOOLOCY, Ifl. 

 Zygote, 27. 



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