﻿198 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  specimens) 
  consist 
  of 
  a 
  central 
  or 
  longitudinal 
  axis 
  which 
  is 
  hollow 
  

   and 
  jointed, 
  and 
  of 
  whorls 
  of 
  lateral 
  branches 
  of 
  pinnules, 
  appar- 
  

   ently 
  four, 
  possibly 
  five 
  in 
  number, 
  radiating 
  from 
  the 
  central 
  axis 
  

   and 
  forming 
  a 
  cylindrical 
  body 
  in 
  the 
  aggregate. 
  The 
  pinnules 
  of 
  

   the 
  whorls 
  are 
  composed 
  of 
  three 
  elements 
  each 
  ; 
  a 
  first 
  joint 
  which 
  

   diverges 
  from 
  the 
  central 
  axis 
  gives 
  origin 
  to 
  two 
  secondary 
  joints, 
  

   while 
  each 
  of 
  these 
  supports 
  two 
  still 
  smaller 
  joints 
  or 
  pinnulae." 
  ^ 
  

   We 
  insert 
  here 
  three 
  of 
  the 
  original 
  accurate 
  figures 
  by 
  the 
  

   author 
  of 
  the 
  genus 
  [text 
  fig. 
  1-3] 
  and 
  add 
  a 
  camera 
  drawing 
  of 
  one 
  

  

  1 
  

  

  Primicorallina 
  trentonensis 
  Whitfield 
  

   Fig. 
  I 
  Slab 
  with 
  specimens, 
  Nat. 
  size 
  

   Fig. 
  2 
  Type, 
  x 
  4 
  

   Fig. 
  3 
  Transverse 
  section. 
  (Copies 
  from 
  Whitfield) 
  

  

  of 
  the 
  type 
  specimens 
  [see 
  pi. 
  i, 
  fig. 
  i], 
  to 
  bring 
  out 
  a 
  few 
  charac- 
  

   ters 
  not 
  noted 
  in 
  the 
  original 
  description. 
  

  

  ^ 
  The 
  following 
  is 
  the 
  original 
  description 
  of 
  the 
  genotype 
  : 
  " 
  Fronds 
  of 
  

   small 
  size, 
  represented 
  by 
  cylindrical 
  tufts 
  of 
  greater 
  or 
  less 
  length, 
  and 
  of 
  

   from 
  one 
  sixth 
  to 
  one 
  fourth 
  of 
  an 
  inch 
  in 
  diameter. 
  Axis 
  of 
  the 
  frond 
  

   irregularly 
  cylindrical 
  and 
  jointed; 
  the 
  joints 
  count 
  about 
  30 
  to 
  the 
  inch 
  and 
  

   are 
  nearly 
  twice 
  as 
  long 
  as 
  thick. 
  Pinnules 
  four, 
  or 
  perhaps 
  five, 
  from 
  each 
  

   joint 
  of 
  the 
  axis, 
  composed 
  of 
  cylindrical, 
  oval 
  or 
  clavate 
  joints 
  ; 
  those 
  

   originating 
  on 
  the 
  axis 
  are 
  of 
  nearly 
  an 
  equal 
  length 
  with 
  the 
  axial 
  

   joints, 
  and 
  each 
  supports 
  two 
  others 
  on 
  the 
  outer 
  end 
  of 
  very 
  nearly 
  or 
  

   somewhat 
  shorter 
  length, 
  but 
  of 
  less 
  thickness 
  ; 
  these 
  again 
  each 
  support 
  

   two 
  others 
  which 
  are 
  short 
  oval 
  in 
  outline 
  and 
  of 
  not 
  more 
  than 
  half 
  the 
  

   length 
  of 
  the 
  others. 
  Bifurcations 
  of 
  the 
  pinnules 
  diverging 
  at 
  an 
  angle 
  of 
  

   about 
  30 
  to 
  35 
  degrees 
  to 
  each 
  other." 
  

  

  