﻿Report 
  oh 
  the 
  State 
  Geologist. 
  883 
  

  

  In 
  1849, 
  Prof. 
  King 
  (Publications 
  of 
  the 
  Palseontographical 
  

   Society, 
  London, 
  2d 
  series, 
  vol. 
  3, 
  p. 
  85) 
  modifies 
  Lonsdale's 
  

   generic 
  characters 
  of 
  Fenestella, 
  as 
  follows 
  : 
  

  

  "A 
  ramose, 
  cellular, 
  calcareous 
  polypidom; 
  cellules 
  Ion 
  gitudin 
  

   ally 
  distributed 
  on 
  one 
  side 
  of 
  the 
  branches 
  in 
  two 
  or 
  more 
  linear 
  

   series 
  ; 
  the 
  series 
  separated 
  from 
  each 
  other 
  by 
  a 
  dividing 
  ridge 
  ; 
  

   forming 
  generally 
  expansions 
  or 
  funnel-shaped 
  bodies," 
  etc. 
  

  

  On 
  page 
  38, 
  ut 
  cit, 
  Prof. 
  King 
  proposes 
  the 
  genus 
  Synocladia, 
  

   which 
  is 
  chiefly 
  based 
  on 
  the 
  character 
  of 
  the 
  connecting 
  

   processes, 
  which 
  are 
  celluliferous 
  and 
  arched 
  or 
  angular 
  ; 
  and, 
  on 
  

   page 
  40 
  the 
  gen 
  as 
  Phyllopora 
  having 
  wide 
  connecting 
  celluliferous 
  

   processes 
  or 
  dissepiments. 
  In 
  his 
  diagnosis 
  he 
  speaks 
  of 
  the 
  

   branches 
  as 
  anastomosing. 
  His 
  original 
  description 
  and 
  a 
  dis- 
  

   cussion 
  of 
  the 
  genus 
  occurs 
  further 
  on 
  in 
  this 
  paper. 
  

  

  In 
  1849, 
  D'Orbigny 
  proposed 
  the 
  new 
  genus 
  Archimedipora, 
  

   founded 
  upon 
  and 
  illustrated 
  by 
  the 
  axis 
  of 
  Archimedes, 
  and 
  

   from 
  a 
  misinterpretation 
  of 
  its 
  true 
  characters. 
  It 
  is 
  identical 
  

   with 
  Archimedes. 
  

  

  In 
  1857, 
  Prof. 
  James 
  Hall 
  (Proc. 
  Amer. 
  Ass. 
  Adv. 
  Science) 
  pro- 
  

   posed 
  the 
  generic 
  name 
  Lyropora 
  for 
  those 
  flabellate 
  forms 
  which 
  

   have 
  their 
  margins 
  greatly 
  thickened 
  and 
  apparently 
  solid. 
  

  

  In 
  1858, 
  Prout 
  (Trans. 
  Acad. 
  Sci. 
  St. 
  Louis) 
  proposed 
  the 
  name 
  

   Fenestralia 
  for 
  a 
  form 
  havirg 
  the 
  general 
  appearance 
  of 
  Polypora, 
  

   but 
  having 
  four 
  ranges 
  of 
  cell 
  apertures, 
  two 
  on 
  each 
  side 
  of 
  a 
  

   prominent 
  median 
  keel 
  or 
  carina. 
  

  

  In 
  the 
  same 
  year 
  and 
  same 
  publication 
  he 
  proposed 
  the 
  name 
  

   Septopora 
  for 
  those 
  forms 
  which 
  differ 
  from 
  Synocladia 
  in 
  having 
  

   only 
  two 
  ranges 
  of 
  cell 
  apertures. 
  

  

  In 
  1887 
  (Palaeontology 
  of 
  JSTew 
  York, 
  vol. 
  YI) 
  the 
  following 
  

   generic 
  names 
  were 
  proposed 
  : 
  

  

  Unite 
  yp 
  a 
  for 
  those 
  forms 
  having 
  the 
  general 
  aspect 
  of 
  

   Fenestella, 
  but 
  with 
  prominent 
  carinae, 
  connected 
  by 
  very 
  thin 
  

   plates, 
  called 
  scalae, 
  which 
  are 
  sometimes 
  expanded 
  at 
  the 
  

   summit 
  ; 
  noncelluliferous 
  face 
  solid, 
  without 
  pores. 
  

  

  Isotbypa, 
  for 
  those 
  forms 
  having 
  the 
  general 
  aspect 
  of 
  Fenestella, 
  

   but 
  having 
  prominent 
  carinae, 
  the 
  expanded 
  summits 
  of 
  which 
  are 
  

   connected 
  by 
  round 
  or 
  oval 
  bars, 
  not 
  plates 
  as 
  in 
  Unitrypa. 
  On 
  

   the 
  reverse 
  face 
  there 
  are 
  conspicuous 
  apertures 
  on 
  or 
  near 
  the 
  

   dissepiments. 
  

  

  