﻿174 
  

  

  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Clathropora 
  frondosa 
  Hall 
  (Fig. 
  75) 
  (1852. 
  Pal 
  N. 
  Y. 
  2:160, 
  

   pi. 
  40B, 
  fig. 
  5a-e) 
  

  

  Distinguishing 
  characters. 
  Reticulate, 
  expanded, 
  flabellate 
  or 
  fun- 
  

   nel-shaped 
  frond, 
  both 
  surfaces 
  regularly 
  and 
  equally 
  celluliferous; 
  

   apertures 
  rhomboidal 
  or 
  oblong 
  quadrangular, 
  opening 
  obHquely 
  

   upward. 
  

  

  Found 
  in 
  the 
  Rochester 
  shale 
  at 
  Lockport 
  (Hall) 
  and 
  probably 
  

   also 
  at 
  Niagara. 
  

  

  Clathropora 
  alcicornis 
  Hall 
  (Fig. 
  76) 
  (1852. 
  Pal. 
  N. 
  Y. 
  2:159, 
  

   pi. 
  zjoB, 
  fig. 
  4a-c) 
  

  

  Distinguishing 
  characters. 
  Cylindric 
  branches, 
  bifurcating 
  and 
  

   variously 
  branched; 
  entire 
  surface 
  celluliferous; 
  apertures 
  quad- 
  

  

  n 
  

  

  Fig. 
  76 
  Clathropora 
  alcicornis 
  ■with 
  enlargement 
  

  

  rangular, 
  rhomboidal 
  or 
  oblong 
  and 
  variable 
  in 
  form 
  at 
  the 
  division 
  

   of 
  the 
  stem. 
  

  

  Found 
  in 
  the 
  lower 
  Rochester 
  shale 
  up 
  to 
  and 
  in 
  the 
  Bryozoa 
  

   bed 
  at 
  Niagara. 
  Rare. 
  Also 
  at 
  Lockport 
  (Hall), 
  

  

  Genus 
  rhinopora 
  Hall 
  

  

  [Ety. 
  : 
  poo?, 
  hide; 
  n6po?, 
  pore] 
  

  

  (1852. 
  Pa/. 
  iV. 
  7.2:48) 
  

  

  Zoarium 
  forming 
  large, 
  undulating 
  bifoliate 
  expansions, 
  cellu- 
  

   liferous 
  on 
  both 
  sides; 
  surface 
  usually 
  smooth, 
  rarely 
  with 
  solid 
  

  

  