﻿NOTICES 
  OF 
  NEW 
  BOOKS. 
  39 
  

  

  De 
  Tries 
  finds 
  most 
  favour 
  with 
  the 
  author, 
  who 
  concludes 
  that 
  

   " 
  a 
  species 
  does 
  not 
  arise 
  from 
  another 
  one 
  because 
  it 
  is 
  better 
  

   adapted"; 
  but 
  that 
  "the 
  formation 
  of 
  the 
  new 
  species 
  is, 
  as 
  a 
  

   rule, 
  quite 
  independent 
  of 
  its 
  adaptive 
  value 
  in 
  regard 
  to 
  the 
  

   parent 
  species"; 
  while 
  after 
  "it 
  has 
  appeared, 
  its 
  survival 
  will 
  

   depend 
  upon 
  whether 
  it 
  can 
  find 
  a 
  place 
  in 
  nature 
  where 
  it 
  can 
  

   exist 
  and 
  leave 
  descendants.''' 
  This 
  view 
  is 
  quite 
  distinct 
  from 
  

   the 
  theory 
  of 
  Darwin, 
  and 
  is 
  called 
  the 
  "survival 
  of 
  species." 
  

   The 
  final 
  paragraph 
  will 
  tend 
  to 
  further 
  elucidate 
  Dr. 
  Morgan's 
  

   meaning 
  : 
  "If 
  we 
  suppose 
  that 
  new 
  mutations 
  and 
  ' 
  definitely 
  ' 
  

   inherited 
  variations 
  suddenly 
  appear, 
  some 
  of 
  which 
  will 
  find 
  an 
  

   environment 
  to 
  which 
  they 
  are 
  more 
  or 
  less 
  fitted, 
  we 
  can 
  see 
  

   how 
  evolution 
  may 
  have 
  gone 
  on 
  without 
  assuming 
  new 
  species 
  

   have 
  been 
  formed 
  through 
  a 
  process 
  of 
  competition. 
  Nature's 
  

   supreme 
  test 
  is 
  survival. 
  She 
  makes 
  new 
  forms 
  to 
  bring 
  them 
  

   to 
  this 
  test 
  through 
  mutation, 
  and 
  does 
  not 
  remodel 
  old 
  forms 
  

   through 
  a 
  process 
  of 
  individual 
  selection." 
  

  

  Quite 
  apart 
  from 
  the 
  enunciation 
  of 
  any 
  particular 
  view 
  on 
  

   these 
  debated 
  questions, 
  the 
  volume 
  is 
  a 
  particularly 
  good 
  and 
  

   accurate 
  guide 
  to 
  the 
  teachings 
  of 
  a 
  large 
  number 
  of 
  natural 
  

   philosophers, 
  including 
  Darwin, 
  Weismann, 
  Lamarck, 
  Mendel, 
  

   De 
  Vries, 
  and 
  Nageli, 
  with 
  references 
  to 
  others 
  who 
  are 
  now 
  

   less 
  read, 
  and 
  apparently 
  even 
  less 
  remembered. 
  We 
  think 
  on 
  

   this 
  point 
  that 
  the 
  author 
  would 
  have 
  added 
  to 
  the 
  value 
  of 
  a 
  

   really 
  good 
  book 
  by 
  referential 
  footnotes, 
  or 
  an 
  appended 
  biblio- 
  

   graphy. 
  

  

  This 
  Darwinian 
  literature 
  — 
  the 
  inception 
  of 
  which 
  is 
  all 
  due 
  

   to 
  the 
  great 
  master, 
  and 
  must 
  bear 
  his 
  name 
  — 
  is 
  now 
  capable 
  of 
  

   forming 
  a 
  library 
  by 
  itself. 
  Like 
  the 
  historic 
  verger 
  who 
  said 
  

   that 
  he 
  had 
  heard 
  the 
  Hulsean 
  Lectures 
  for 
  thirty 
  years, 
  and 
  yet 
  

   thanked 
  God 
  that 
  he 
  was 
  still 
  a 
  Christian, 
  we 
  turn 
  from 
  the 
  

   perusal 
  of 
  these 
  many 
  books, 
  from 
  the 
  rival 
  doctrines 
  of 
  neo- 
  

   Darwinians 
  and 
  neo-Lamarckians, 
  and 
  feel 
  profoundly 
  satisfied 
  

   that 
  we 
  are 
  still 
  anions 
  the 
  evolutionists. 
  

  

  