

INDEX. 



td. 



. : 01 — 1 1 1, 

 trated in Plant Species, 



Cumula- 



III. 



151. 



Air .51. 



- 

 Con 



. ins for, in Partula I 



ial. 160. 

 Sex 



rminal. 1' 

 - 

 Impregnational. 163-171. 



nal Alone is Negative, 16.3. 

 - 



ential, 166-1 : 

 How Accumulated, 168. 



•utional, 171. 

 The Importance of Impregnational, 1 72— 

 174. 



r.ing of Isolation and, 17 5. 

 rms of, 1 " 

 Computation of, 177-183. 

 In' 



f Intensive, 185-212. 

 rms of, Cooperate, 247-248. 

 '•rgent Evolution Through Cumulative, 

 262. 

 Selection 



Not Always the Cause of Divergence. 3-6. 

 Divergence that is not Due to Sexual, 3. 



Nor to Natural, 4—5. 

 Of a Species Does Not Change the Species, 



14. 

 Of Other Than Average Varieties Produces 



Change. 15. 

 When Unbalanced 1'roduces Change, 15. 

 Conditioned by Fertility, 15. 

 Of Average Forms Tends to Stability, 16, 



195 L96. 

 Pecundal. Due to Superior Fertility, 16. 

 !Y'>duce Diversity or Unity, 25, 29. 

 Diversity of, with Isolation Causes Diver- 

 gence. 8, 22. 

 How Par an Explanation of Divergence, 



29 J4. 

 What it Does Not Explain. 29-31. 

 How Par Determined by Environment, 



3 132. 

 Endonomic, ' Ine Form of Autonomic, 32. 



Changed Without Change in Envi- 

 ronment. 33. 



if Natural, 34. 

 15. 

 ad Passive. 45. 

 Headley says. May be Controlled by the Or- 

 ganism 



Selection — Continued. 

 Defined. 5.3, 195. 

 Coincident. I 



En 63. 



In Chimney Swift. 64. 

 In Tree Swallow, 64. 

 In House Wren. 64. 

 In Infants. 64. 



And Coincident. 65-67. 

 Illustrated by Swimming Cats. 67-68. 

 Structural, 68-70. 



82-114 151 

 Conjunctional. 82-83, 197. 



- 

 Impregnational, 82, 87-111, 197. 206. 



I 11-112. 207. 



Prudential, 82. 111-114. I : 



May Control His Own 

 Evolution. 112, 153. 

 Sexual* 8.3-84, 200-202. 

 Social. 83-84. 202-203. 

 Filio-parenta!, 83, 86, 203. 



And Lactation, 204. 

 Dimensional, 87-88, 204-205. 

 Structural. 87-89. 

 Potential, 87. 89. 

 Fecundal. 87, 90 -9.5. 206. 

 Environal, 115-118, 196, 200 



Endonomic, 115-117. 152. 156. 197. 

 Habitudinal. 115-117. 

 Aptitudinal. 115-117. 

 Heteronomic. 115, 117-118. 197. 

 Natural. 115. 117-118. 

 Artificial, 115, 117-118. 

 Forms of. Defined. 1 39. 



Conditions Determining the Forms of, 14n. 

 Unwarranted Assumption Concerning Nat- 

 ural, 144-14.5. 

 I'nhalanced, 149. 

 ition r,f. 198. 

 Rational and Adaptation.!! 199 

 Forms of, Classified. 199. 

 Self-cumulative Endowments, 96-98. 

 Sexual — 



Election, 8.3-84. 

 Isolation. 8.3 84. 

 Selection, 83. 200-202. 



Darwin says Causer! by Divergent In- 

 stincts; what Causes the Latter, 11, 

 200. 

 Explanation given, 201. 

 Illustrated by Creeping Cricket. 200. 

 Social — 



Election, 83, 85. 

 Isolation, 83, 85. 

 Partition, 83, 85. 

 Selection, 83-84. 

 Spec: 



Intergrading Between, 40-42. 

 Statistical Test of, 40. 



* See under Sexual. 



