﻿A 
  Further 
  Study 
  of 
  Chromosome 
  Dimensions. 
  

  

  157 
  

  

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  A 
  Further 
  Study 
  of 
  Chromosome 
  Dimensions. 
  

   By 
  C. 
  F. 
  U. 
  Meek. 
  

  

  (Communicated 
  by 
  Prof. 
  S. 
  J. 
  Hickson, 
  F.R.S. 
  — 
  Eeceived 
  October 
  28, 
  1919.) 
  

  

  (Plates 
  2 
  and 
  3.) 
  

  

  Introduction. 
  

  

  In 
  1912 
  I 
  published 
  a 
  paper 
  giving 
  measurements 
  of 
  the 
  chromosomes 
  

   composing 
  the 
  complexes 
  of 
  species 
  belonging 
  to 
  both 
  closely 
  allied 
  and 
  

   widely 
  separated 
  divisions 
  of 
  the 
  animal 
  kingdom. 
  The 
  material 
  studied 
  

   consisted 
  chiefly 
  of 
  the 
  spermatogenetic 
  cell 
  generations 
  : 
  and 
  these 
  investiga- 
  

   tions, 
  so 
  far 
  as 
  I 
  am 
  aware, 
  constituted 
  the 
  first 
  serious 
  attempt 
  to 
  measure 
  

   chromosomes 
  and 
  to 
  compare 
  chromosome 
  dimensions 
  throughout 
  the 
  animal 
  

   kingdom. 
  The 
  results 
  obtained 
  proved 
  certain 
  generalisations, 
  and 
  suggested 
  

   others. 
  

  

  The 
  first 
  generalisation 
  with 
  which 
  I 
  intend 
  to 
  deal 
  here 
  was 
  that 
  the 
  

   degree 
  of 
  somatic 
  complexity 
  of 
  an 
  animal 
  cannot 
  be 
  correlated 
  with 
  the 
  

   vol. 
  xci. 
  — 
  B. 
  N 
  

  

  