﻿126 
  Twenty-eighth 
  Repoet 
  on 
  the 
  State 
  Museum. 
  

  

  THAMNISCUS 
  King. 
  

   Thamhtiscus 
  Niagarevsis. 
  

  

  Plate 
  11. 
  Figs. 
  22 
  -25. 
  

  

  Tliamniscus 
  ? 
  Xiagarensis 
  Hall. 
  Doc. 
  Edit. 
  2Sth 
  Rep. 
  St. 
  Mus. 
  Nat. 
  Hist. 
  Expla- 
  

   nation 
  of 
  pi. 
  11. 
  figs. 
  22-25. 
  1876. 
  

  

  Bryozourn 
  frutieose. 
  often 
  somewhat 
  broadly 
  funnel-shaped, 
  

   numerous 
  stems 
  growing 
  from 
  a 
  common 
  base, 
  bifurcating 
  but 
  

   not 
  unitinsr 
  laterallv 
  ; 
  branches 
  much 
  thickened 
  below 
  the 
  bi- 
  

  

  O 
  ml 
  I 
  

  

  furcations 
  ; 
  celluliferous 
  on 
  the 
  exterior 
  side 
  ; 
  non-ceiiuliferous 
  

   side 
  striated 
  : 
  strife 
  strong, 
  sinuous, 
  often 
  granulose. 
  from 
  

   three 
  to 
  five 
  in 
  the 
  width 
  of 
  the 
  branch 
  : 
  poriferous 
  side 
  fre- 
  

   quently 
  angular 
  in 
  the 
  middle 
  : 
  cell-apertures 
  contiguous, 
  

   round, 
  or 
  polygonal 
  from 
  contact 
  of 
  the 
  margins 
  with 
  each 
  

   other. 
  Irregularly 
  arranged, 
  from 
  .15 
  to 
  .'25 
  mm. 
  in 
  diameter. 
  

  

  This 
  species 
  occurs 
  as 
  a 
  ramose 
  frond 
  rising 
  from 
  a 
  single 
  

   base, 
  or 
  spreading 
  equally 
  on 
  all 
  sides 
  and 
  broadly 
  funnel- 
  

   shaped. 
  The 
  poriferous 
  sides 
  of 
  the 
  branches 
  are 
  round 
  or 
  

   angular. 
  Xo 
  other 
  species 
  of 
  the 
  genus 
  is 
  known 
  to 
  me 
  in 
  

   the 
  Xiagara 
  formation. 
  

  

  