﻿120 
  Twenty-eighth 
  Keport 
  on 
  the 
  State 
  Museum. 
  

  

  This 
  species 
  differs 
  from 
  C. 
  agellus 
  in 
  not 
  showing 
  lines 
  

   of 
  cellules 
  radiating 
  from 
  the 
  maculae 
  or 
  nodes, 
  and 
  in 
  the 
  less 
  

   distinct 
  elevation 
  of 
  the 
  cell-tubes 
  upon 
  the 
  surface. 
  

  

  Ceramopora 
  agellus. 
  

  

  Plate 
  8, 
  Fig. 
  6. 
  

  

  Ceramopora 
  agellus 
  Halx.. 
  Doc. 
  Edit. 
  28th 
  Rep. 
  St. 
  Mus. 
  Nat. 
  Hist. 
  Explana- 
  

   tion 
  of 
  pi. 
  8, 
  fig. 
  6. 
  1876. 
  

  

  Bryozoum 
  consisting 
  of 
  a 
  thin 
  expansion 
  covering 
  the 
  sur- 
  

   face 
  of 
  other 
  organic 
  bodies 
  ; 
  cells 
  subcylindrical, 
  short, 
  very 
  

   oblique, 
  rapidly 
  expanding 
  toward 
  the 
  apertures. 
  Cell-aper- 
  

   tures, 
  when 
  entire, 
  arching 
  and 
  angular, 
  and 
  when 
  worn, 
  

   broadly 
  elliptical 
  ; 
  about 
  four 
  in 
  the 
  space 
  of 
  a 
  millimetre 
  on 
  

   the 
  . 
  greater 
  part 
  of 
  the 
  surface, 
  and 
  upon 
  the 
  maculae, 
  two 
  or 
  

   three 
  in 
  the 
  same 
  space. 
  

  

  The 
  surface 
  of 
  the 
  frond 
  is 
  marked 
  by 
  numerous 
  maculae 
  

   which 
  do 
  not 
  rise 
  into 
  nodes, 
  but 
  are 
  covered 
  by 
  cells 
  of 
  from 
  

   once 
  and 
  a 
  half 
  to 
  twice 
  the 
  diameter 
  of 
  the 
  ordinary 
  cells. 
  

   The 
  cellules 
  of 
  the 
  entire 
  frond 
  appear 
  to 
  radiate 
  from 
  a 
  single 
  

   point, 
  which 
  is 
  not 
  the 
  center, 
  and 
  again 
  from 
  each 
  of 
  the 
  ma- 
  

   culae 
  are 
  distinct 
  radiating 
  lines 
  of 
  cellules 
  in 
  the 
  direction 
  of 
  

   the 
  growth. 
  In 
  these 
  characters 
  the 
  species 
  differs 
  from 
  C. 
  

   conjlueiis. 
  This 
  species 
  occurs 
  upon 
  the 
  surface 
  of 
  Gaster- 
  

   opoda 
  and 
  Brachiopoda, 
  but 
  has 
  rarely 
  been 
  seen 
  upon 
  the 
  

   calyces 
  of 
  crinoids. 
  

  

  PALESCHARA 
  Hall. 
  

   Paleschara 
  offula. 
  

  

  Plate 
  8, 
  Figs. 
  7, 
  8. 
  

  

  Paleschara 
  offula 
  Hall. 
  Doc. 
  Edit. 
  28th 
  Rep. 
  St. 
  Mus. 
  Nat. 
  Hist. 
  Explanation 
  

   of 
  pi. 
  8, 
  figs. 
  7, 
  8. 
  1876. 
  

  

  Bryozoum 
  consisting 
  of 
  a 
  thin 
  expansion 
  attached 
  to 
  other 
  

   organic 
  bodies, 
  one 
  side 
  being 
  celluliferous 
  ; 
  cellules 
  polygo- 
  

   nal, 
  from 
  five 
  to 
  seven-sided, 
  varying 
  from 
  .25 
  to 
  .50 
  mm. 
  in 
  

   diameter. 
  

  

  This 
  species 
  presents 
  the 
  usual 
  character 
  of 
  the 
  species 
  of 
  

   this 
  genus, 
  having 
  wide, 
  shallow 
  polygonal 
  cells 
  which 
  are 
  

   larger 
  than 
  those 
  of 
  P. 
  maculata. 
  The 
  specimens 
  of 
  this 
  

   species, 
  so 
  far 
  as 
  known, 
  present 
  no 
  maculae 
  of 
  larger 
  cells 
  

   or 
  of 
  barren 
  spaces. 
  

  

  