﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  1 
  65 
  

  

  Found 
  rarely 
  in 
  the 
  lower 
  Rochester 
  shale, 
  associated 
  with 
  I 
  c 
  h 
  - 
  

   thyocrinus 
  and 
  other 
  rare 
  fossils. 
  Niagara 
  sections. 
  Also 
  in 
  

   the 
  same 
  shale 
  at 
  Lockport 
  (Hall). 
  

  

  Genus 
  lioclema 
  Ulrich 
  

  

  [Ety.: 
  Xe'to?, 
  smooth; 
  xX7;fj.a, 
  twig] 
  

  

  (1882. 
  Cin. 
  soc. 
  naf. 
  hist. 
  Jour. 
  5 
  1141, 
  154) 
  

  

  Zoarium 
  ramose, 
  lamellar, 
  subglobose 
  or 
  incrusting; 
  surface 
  

   frequently 
  exhibiting 
  distinct 
  monticules 
  or 
  maculae; 
  zooecia 
  with 
  

   subcircular 
  or 
  irregularly 
  petaloid 
  apertures, 
  separated 
  by 
  abundant 
  

   angular 
  mesopores, 
  which 
  in 
  some 
  species 
  are 
  open 
  at 
  the 
  surface, 
  in 
  

   others 
  closed; 
  diaphragms 
  few 
  in 
  the 
  zooecia, 
  abundant, 
  sometimes 
  

   crowded 
  in 
  the 
  m.esopores; 
  acanthopores 
  numerous 
  and 
  strong 
  in 
  

   the 
  typical 
  species, 
  small 
  and 
  inconspicuous 
  in 
  others. 
  

  

  Lioclema 
  florida 
  (Hall) 
  (Fig. 
  

   62). 
  Callopora 
  florida 
  

   Hall 
  (1852. 
  Pal. 
  N. 
  Y. 
  2:146, 
  

   pi. 
  40, 
  fig. 
  2a-f) 
  

  

  Distinguishing 
  characters. 
  Ex- 
  

   planate 
  or 
  incrusting 
  habit; 
  tubu- 
  ),^^r1r"'^A^>~^ 
  

   lar 
  cells; 
  floriform 
  apertures 
  the 
  ^ 
  C/\r^ 
  '<) 
  

   margins 
  of 
  which 
  appear 
  as 
  if 
  ^"^.^/^^^y^ 
  

   formed 
  of 
  segments 
  of 
  six 
  or 
  ^. 
  ,^^. 
  , 
  ^ 
  ., 
  _ 
  

  

  ° 
  Fior. 
  62 
  Lioclema 
  florida 
  with 
  side 
  and 
  summit 
  

  

  seven 
  smaller 
  curves; 
  each 
  angle 
  "''"' 
  ""'^'°"^*' 
  "^^ 
  '^'^ 
  '"^^^^' 
  ^""^^ 
  ""^^^^"^ 
  

   of 
  aperture 
  furnished 
  with 
  spine 
  (acanthopore) 
  ; 
  mesopores 
  angular 
  

   in 
  perfect 
  specimens. 
  

  

  Found 
  in 
  the 
  Bryozoa 
  beds 
  of 
  the 
  Rochester 
  shales 
  at 
  Niagara, 
  

  

  rare. 
  Also 
  at 
  Lockport 
  (Hall). 
  

  

  lioclema 
  aspera 
  (Hall) 
  (Fig. 
  6^,). 
  

   Callopora 
  aspera 
  Hall 
  (1852. 
  

   Pal. 
  N. 
  Y. 
  2:147, 
  pi. 
  40, 
  fig. 
  4a-i) 
  

  

  Distinguishing 
  characters. 
  Stems 
  

   solid 
  or 
  hollow 
  cylinders, 
  often 
  also 
  

   incrusting 
  other 
  bodies 
  in 
  brc^d, 
  

   explanate 
  or 
  foliate 
  expansions; 
  

  

  Fier. 
  63 
  Lioclema 
  aspera 
  with 
  enlargements 
  of 
  , 
  , 
  .1 
  • 
  i 
  1 
  • 
  • 
  r 
  

  

  surface 
  clavatc 
  or 
  thickened 
  extremities 
  oi 
  

  

  stems; 
  circular 
  or 
  slightly 
  oval 
  apertures; 
  finely 
  reticulated 
  inter- 
  

   spaces; 
  margins 
  of 
  apertures 
  surrounded 
  by 
  minute 
  points 
  (acantho- 
  

  

  