﻿246 
  Retrograde 
  Varieties 
  

  

  in 
  the 
  species 
  in 
  the 
  latent 
  state, 
  and 
  to 
  the 
  oc- 
  

   casional 
  re-energizing 
  thereof. 
  

  

  Specific 
  or 
  varietal 
  latency 
  is 
  not 
  the 
  same 
  

   thing 
  as 
  the 
  ordinary 
  latency 
  of 
  characters 
  that 
  

   only 
  await 
  their 
  period 
  of 
  activity, 
  or 
  the 
  ex- 
  

   ternal 
  influence 
  which 
  will 
  awake 
  them. 
  They 
  

   are 
  permanently 
  latent, 
  and 
  could 
  well 
  be 
  des- 
  

   ignated 
  by 
  the 
  word 
  perlatent. 
  They 
  spring 
  

   into 
  activity 
  only 
  by 
  some 
  sudden 
  leap, 
  and 
  then 
  

   at 
  once 
  become 
  independent 
  of 
  ordinary 
  exter- 
  

   nal 
  stimulation. 
  

  

  