﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  

  

  143 
  

  

  Fig. 
  33 
  Favosites 
  niagarensis 
  

  

  Genus 
  halysites 
  Fischer 
  

   [Ety. 
  : 
  dAu(Tc<$, 
  a 
  chain] 
  

  

  (1813. 
  Zoognosia. 
  3d 
  ed. 
  t. 
  i, 
  p. 
  387) 
  

  

  Corallum 
  forming 
  a 
  cKistered 
  and 
  reticulated 
  mass, 
  composed 
  of 
  

   long 
  tubular, 
  cylindric 
  or 
  compressed 
  corallites, 
  which 
  are 
  placed 
  

   side 
  by 
  side 
  in 
  intersecting 
  and 
  anastomosing 
  laminae 
  or 
  lines, 
  any 
  

   given 
  corallite 
  being 
  united 
  along- 
  its 
  whole 
  length 
  with 
  its 
  neigh- 
  

   bors 
  to 
  the 
  right 
  and 
  left, 
  and 
  each 
  lamina 
  of 
  the 
  corallum 
  con- 
  

   sisting 
  of 
  no 
  more 
  than 
  a 
  single 
  linear 
  series 
  of 
  tubes. 
  Walls 
  of 
  the 
  

   corallites 
  strong 
  and 
  without 
  pores, 
  the 
  free 
  portions 
  covered 
  by 
  a 
  

   continuous 
  thick 
  epitheca 
  showing 
  lines 
  of 
  growth. 
  Small 
  coral- 
  

   lites 
  often 
  alternate 
  with 
  the 
  larger 
  ones. 
  Septa 
  obsolete 
  or 
  repre- 
  

   sented 
  by 
  vertical 
  rows 
  of 
  spines 
  in 
  cycles 
  of 
  12. 
  Tabulae 
  well 
  

   developed, 
  complete 
  and 
  simple, 
  more 
  numerous 
  in 
  the 
  smaller 
  

   corallites. 
  

  

  Halysites 
  catenulatus 
  (Linn.) 
  (Fig. 
  39). 
  Catenipora 
  es- 
  

   charoides 
  (Lamarck) 
  Hall 
  (1852. 
  Pal. 
  N. 
  Y. 
  2:127, 
  pl- 
  35) 
  

  

  Fig. 
  39 
  Halysites 
  catenulatus 
  

  

  