﻿834 
  Forty-seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  primitive 
  phyletic 
  condition 
  of 
  the 
  Terebratellibm 
  ; 
  and, 
  too, 
  

   in 
  the 
  earliest 
  spire-bearers 
  and 
  rhynchonellids. 
  Hence 
  the 
  

   conclusion 
  above 
  expressed 
  as 
  to 
  the 
  successive 
  phyletic 
  relations 
  

   of 
  the 
  primitive 
  rhynchonellids, 
  terebratuloids 
  and 
  spire-bearers, 
  

   based 
  upon 
  the 
  relations 
  and 
  modifications 
  in 
  the 
  form 
  of 
  their 
  

   brachial 
  supports, 
  is 
  fairly 
  substantiated 
  by 
  the 
  evidence 
  drawn 
  

   from 
  other 
  data. 
  

  

  Finally, 
  it 
  is 
  important 
  to 
  emphasize 
  the 
  intimate 
  similarity 
  

   between 
  Renss 
  el 
  j5ri 
  a 
  and 
  the 
  pentameroid 
  genus 
  Amphigenia 
  ; 
  

   genera 
  in 
  which 
  the 
  essential 
  distinction 
  between 
  the 
  typical 
  

   forms 
  of 
  each 
  lies 
  in 
  the 
  simple 
  loop 
  of 
  the 
  former 
  and 
  the 
  long, 
  

   expanded, 
  but 
  still 
  discrete 
  crural 
  processes 
  of 
  the 
  latter. 
  Atten- 
  

   tion 
  has 
  been 
  directed 
  to 
  these 
  similarities 
  and 
  differences, 
  and 
  

   it 
  has 
  also 
  been 
  pointed 
  out 
  that 
  the 
  spondylium 
  in 
  Amphigenia 
  

   elongata 
  is 
  at 
  times 
  almost 
  reproduced 
  in 
  specimens 
  of 
  Renssel- 
  

   ceria 
  ovoides 
  where 
  the 
  dental 
  lamellao 
  are 
  highly 
  developed. 
  

  

  