﻿91 
  

  

  lashing 
  movement 
  of 
  the 
  long 
  lash 
  like 
  filaments 
  arranged 
  

   in 
  a 
  circle 
  between 
  the 
  shell 
  and 
  the 
  mouth. 
  

  

  In 
  a 
  general 
  way, 
  the 
  segmentation 
  of 
  the 
  egg 
  of 
  the 
  

   clam 
  apj)ears 
  to 
  resemble, 
  in 
  its 
  early 
  stages, 
  at 
  least, 
  the 
  

   same 
  process 
  in 
  Anodonta^ 
  as 
  described 
  by 
  Flemming.-' 
  

   The 
  conclusion 
  that 
  the 
  clam 
  is 
  exactly 
  parallel 
  to 
  Ano- 
  

   donta 
  in 
  its 
  development 
  is 
  not, 
  however, 
  warranted 
  for 
  

   this 
  reason, 
  and 
  to 
  clear 
  up 
  the 
  questions 
  raised 
  here, 
  we 
  

   must 
  await 
  the 
  results 
  of 
  another 
  season's 
  work. 
  

  

  *Studien 
  in 
  der 
  Entwickeluiigsgeschichte 
  der 
  Najaden. 
  Sitzb. 
  de 
  k. 
  Akad. 
  der 
  VVissensch.,LXXI« 
  

   Bd., 
  I 
  and 
  II 
  Hft., 
  p. 
  8i. 
  Vienna, 
  1875. 
  

  

  