﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  

  

  151 
  

  

  Found 
  in 
  the 
  Rochester 
  shale 
  at 
  Niagara, 
  Lockport 
  and 
  other 
  

   places. 
  Often 
  very 
  abundant. 
  At 
  Niagara 
  it 
  has 
  been 
  found 
  as 
  

   low 
  as 
  4 
  feet 
  above 
  the 
  Clinton 
  limestone, 
  and 
  from 
  that 
  upward 
  

   as 
  far 
  as 
  the 
  Bryozoa 
  beds, 
  in 
  which 
  it 
  occurs 
  in 
  moderate 
  abun- 
  

   dance. 
  It 
  has 
  not 
  been 
  found 
  above 
  these 
  beds. 
  It 
  occurs 
  chiefly 
  

   in 
  the 
  calcareous 
  layers 
  of 
  the 
  shale, 
  from 
  which 
  it 
  weathers 
  out, 
  

   the 
  nut-like 
  calyxes 
  rolHng 
  to 
  the 
  bottom 
  of 
  the 
  section 
  where 
  they 
  

   can 
  be 
  picked 
  up 
  by 
  the 
  side 
  of 
  the 
  railroad 
  track.^ 
  

  

  Genus 
  callocystites 
  Hall 
  

  

  [Ety. 
  : 
  xdUo?, 
  beauty; 
  xuff-ci, 
  bladder] 
  

  

  (1852. 
  Pal.N. 
  Y. 
  2:238) 
  

  

  Calyx 
  composed 
  of 
  large 
  plates 
  arranged 
  in 
  three 
  or 
  four 
  cycles 
  

   and 
  having 
  four 
  pectinated 
  rhombs, 
  the 
  component 
  halves 
  of 
  which 
  

   stand 
  on 
  contiguous 
  plates 
  and 
  

   are 
  separated 
  by 
  an 
  interval. 
  

   Mouth 
  slit-like, 
  and 
  forming 
  the 
  

   center 
  of 
  radiation 
  for 
  two 
  to 
  five 
  

   pinnulated 
  arms, 
  which 
  some- 
  

   times 
  bifurcate, 
  and 
  are 
  pro- 
  

   tected 
  by 
  covering 
  pieces, 
  and 
  

   either 
  repose 
  on 
  the 
  calyx 
  or 
  

   are 
  sunk 
  below 
  the 
  surface 
  in 
  

   grooves. 
  Stem 
  well 
  developed. 
  

   tapering 
  down 
  to 
  a 
  point. 
  

  

  Callocystites 
  jewetti 
  Hall 
  (Fig. 
  

   47) 
  (1852. 
  PaL 
  N. 
  Y. 
  2:239, 
  

   pl. 
  50) 
  

  

  Distinguishing 
  characters. 
  Ob- 
  

   long 
  ovoid, 
  nearly 
  symmetric 
  

   form; 
  base 
  of 
  four 
  plates, 
  one 
  

   bearing 
  part 
  of 
  pectinated 
  rhomb 
  ; 
  

   eight 
  plates 
  in 
  second 
  cycle 
  ; 
  anal 
  

   aperture 
  between 
  second 
  and 
  spread, 
  

   third 
  cycle, 
  excavated 
  in 
  two 
  plates 
  of 
  the 
  former 
  and 
  one 
  of 
  

   the 
  latter; 
  surface 
  of 
  plates 
  ornamented 
  by 
  polygonal 
  depressions, 
  

   having 
  a 
  more 
  or 
  less 
  defined 
  border 
  and 
  granulose 
  surface. 
  

  

  ^Specimens 
  of 
  this 
  " 
  crinoid 
  " 
  may 
  be 
  purchased 
  from 
  John 
  Garlow, 
  the 
  

   watchman 
  on 
  the 
  middle 
  section 
  of 
  the 
  New 
  York 
  Central 
  railroad 
  cut 
  in 
  

   the 
  gorge, 
  at 
  a 
  moderate 
  price. 
  

  

  Fig. 
  47 
  Callocystites 
  jewetti 
  with 
  the 
  armgrooves 
  

  

  