Vili CONTENTS 
Explanation of Plate Wl 225. soc ake ps ne oegt oe teen tee eae 4I 
@Oahuthe Metropolis ofthe Achatinellidcen eee eee ee ieee “42 
Plate A. Map of the Hawaiian Islands. 
Plate I. Eight Genera of Achatinellide. 
Plate B. Map of Oahu, Hawaiian Islands. 
Plate Il. ‘Twenty-five Species of Achatinella. 
Plate III. Variation and Intergrading of Bulimella. 
Explanationion Plate Bi.!. aaeenic sor Geer) aaah tek anion 43 
CHAPTER V.—THE Four SEGREGATIVE PRINCIPLES. 
Racialvandvtabitudinall Sepme cai ot paey ny ie ren en eae eee ena 45-50 
Interaction of Acquired and Inherited Characters................ 45 
Sesnegatdom a, Muncearm etal ly alyssa teers ea eee 47 
SegregatevAssociattony 23 4 coherence ako oe eae eet eae eee 48 
Interactioniol Racitalland’ Socal Hactorgs es eee eens 49 
Determinate Evolution of Evolutionary Terminology............. 50 
Segregation the Combined Result from Four Principles............... 51-55 
Racial Segregation Controlled by Two Principles and Habitudinal 
Segregatiom' by; Two seg evs ce ee ey ie) pers ound a chee eee ae ee 51 
Importance of Isolation san eens See ee eee eee eae 51 
Definitions of the Four Segregative Principles................... 53 
Objections to the Terms.) 5.562 Sanches Gene Er ee eee 54 
Interactionjioh the Hour Principles; -— sense er eer aie: ere 55-78 
Repeated Action of One or Combined Action of Several Principles. . 55 
Imiportance.of Hachiof the Principles: -4 5:01... «+e ee 56 
iwoiMethodsiof Generalization) ..4:5 ese. se ee ei eee 58 
Change'of Tradition in\Chininey Swit). .20c eee cen 59 
Variation and Accommodation Two Methods of Adjustment....... 59 
Conditions Suddenly or Gradually Encountered.................. 60 
Accommodation dn Mem Gar fiz cee. tiers eee eel tees ee eee rae ee 61 
Bndoromie Selection ist).20 48 Soh oss oe Re eee Priors Ate: 63 
Coincident :Selecivomms he (Aiea ays es a ae a ee ae eee eee eg 64 
Endonomic and Coincident Selection Contrasted................. 65 
ComerdenttSelectionpliltstrate cryin ele acinar 66 
Endonomic and Coincident Influences Defined................... _ 66 
A\Colomyror CatsivitheAG tat Ciela bitch arene ere een 67 
Structural Isolation and Structural Selection Illustrated.......... 68-70 
Young Snails with Reverse Coil from that of Parents ............. 7O 
Mutations and! Vanietiest 2 s.)2 srs. tc ene oe Cee oe eee eee 7a 
‘Theories' Compared: ai. i002 es nee nate ee eS eee eee 2 
Degeneration witha Cessationiof Selections ane ene eres 73 
Degeneration in Hye-sight andatc lessons see eee eee 74 
Desenerationane Breeding tls hie is ase ie eres eee ere 75-76 
Mutation as Recently Expounded by De Vries................... FI 
Selection and Inheritance of Acquired Characters................ 78 
CHAPTER VI.—ANALYSIS OF THE FOUR PRINCIPLES OF SEGREGATION. 
Chief Divisions of the our Principless mem eee ree eee nee 79-81 
Six Conditions on which Racial Evolution Rests................. 79 
Six Conditions on which Habitudinal Evolution Rests............ 80 
