﻿The 
  Fauna 
  of 
  the 
  Niagara 
  Group. 
  121 
  

  

  Paleschara 
  maculata. 
  

  

  Plate 
  8, 
  Figs. 
  9-13. 
  

  

  Palesehara 
  maculata 
  Hall. 
  Doc. 
  Edit. 
  28th 
  Rep. 
  St. 
  Mus. 
  Nat. 
  Hist. 
  Explana- 
  

   tion 
  of 
  pi. 
  8, 
  figs. 
  9, 
  10. 
  1876. 
  

  

  P.? 
  aspera 
  Hall. 
  Doc. 
  Edit. 
  28th 
  Rep. 
  St. 
  Mus. 
  Nat. 
  Hist. 
  Explanation 
  of 
  pi. 
  

   8, 
  figs. 
  11-13. 
  1876. 
  

  

  Bryozoum 
  a 
  thin 
  foliate 
  expansion 
  encrusting 
  other 
  organic 
  

   bodies. 
  Cells 
  polygonal, 
  contiguous, 
  about 
  three 
  to 
  four 
  in 
  

   the 
  space 
  of 
  one 
  millimetre, 
  with 
  maculae 
  of 
  larger 
  cells 
  un- 
  

   equally 
  distributed 
  over 
  the 
  surface. 
  

  

  The 
  cells 
  appear 
  to 
  be 
  arranged 
  in 
  somewhat 
  concentrically 
  

   radiating 
  lines, 
  and 
  are 
  longer 
  in 
  the 
  direction 
  of 
  these 
  lines, 
  

   the 
  length 
  being 
  sometimes 
  twice 
  as 
  great 
  as 
  the 
  width. 
  In 
  

   well-preserved 
  specimens 
  there 
  are 
  distinct 
  short 
  spinules 
  at 
  

   the 
  angles 
  of 
  the 
  cells. 
  

  

  The 
  figures 
  referred 
  to 
  Palesehara 
  f 
  aspera, 
  on 
  Plate 
  8, 
  

   are 
  representations 
  of 
  a 
  phase 
  of 
  P. 
  maculata, 
  and 
  the 
  cell- 
  

   apertures 
  are 
  incorrectly 
  delineated. 
  

  

  Paleschara 
  incrassata 
  n. 
  sp. 
  

  

  Bryozoum 
  occurring 
  as 
  thin, 
  or 
  more 
  or 
  less 
  thickened, 
  ex- 
  

   pansions 
  encrusting 
  other 
  organic 
  bodies. 
  Cellules 
  oval 
  ; 
  

   apertures 
  margined 
  with 
  coarse 
  granulse 
  or 
  spinules, 
  and 
  in 
  

   specimens 
  somewhat 
  worn, 
  the 
  cellules 
  are 
  separated 
  by 
  a 
  

   distinct 
  intercellular 
  space 
  or 
  a 
  thickening 
  of 
  the 
  cell- 
  walls. 
  

  

  This 
  form 
  is 
  distinguished 
  from 
  P. 
  maculata 
  by 
  the 
  smaller 
  

   oval 
  cell-apertures, 
  the 
  thicker 
  interspaces 
  and 
  coarser 
  gran- 
  

   ule 
  at 
  the 
  margins 
  of 
  the 
  cells. 
  It 
  may 
  be 
  only 
  a 
  variety 
  of 
  

   that 
  species 
  possessing 
  these 
  distinctive 
  features. 
  

  

  Paleschara 
  \ 
  (Ch^etetes 
  ?) 
  sph^erion. 
  

  

  Plate 
  8, 
  Figs. 
  14, 
  15. 
  

  

  Paleschara? 
  sphcerion 
  Hall. 
  Doc. 
  Edit. 
  28th 
  Rep. 
  St. 
  Mus. 
  Nat. 
  Hist. 
  Expla- 
  

   nation 
  of 
  pi. 
  8, 
  figs. 
  14 
  and 
  15. 
  1876. 
  

  

  Bryozoum 
  incrusting 
  or 
  free, 
  occurring 
  in 
  flattened, 
  irregu- 
  

   larly 
  circular, 
  or 
  depressed 
  hemispheric 
  masses 
  of 
  one 
  or 
  two 
  

   millimetres 
  in 
  thickness; 
  in 
  its 
  more 
  complete 
  condition 
  

   asuming 
  a 
  spheroidal 
  hollow 
  form/ 
  Cells 
  polygonal, 
  contigu- 
  

  

  