﻿I40 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  y 
  

  

  ''v„* 
  

  

  Fig. 
  33 
  Diplophyllum 
  caespitosum 
  with 
  longitudinal 
  and 
  transverse 
  sections 
  

  

  'Found 
  in 
  the 
  lower 
  part 
  of 
  the 
  Lockport 
  hmestone 
  series 
  at 
  Lock- 
  

   port, 
  and 
  may 
  also 
  occur 
  at 
  Niagara. 
  

  

  Genus 
  favosites 
  Larnarck 
  

  

  [Ety. 
  : 
  faviis, 
  honeycomb] 
  

  

  (1816. 
  Hist, 
  dcs 
  aniin. 
  sans 
  vert. 
  2 
  1204) 
  

  

  Corallum 
  massive, 
  more 
  rarely 
  branching, 
  commonly 
  forming 
  

   heads 
  which 
  may 
  be 
  a 
  foot 
  or 
  more 
  in 
  diameter. 
  Corallites 
  pris- 
  

   matic, 
  thin, 
  in 
  contact 
  but 
  not 
  amalgamated 
  by 
  their 
  walls, 
  which 
  are 
  

   perforated 
  by 
  equidistant 
  mural 
  pores 
  in 
  one 
  or 
  more 
  rows. 
  Septa 
  

   rudimentary 
  or 
  obsolete. 
  Numerous 
  more 
  or 
  less 
  regular 
  tabulae 
  

   divide 
  the 
  intrathecal 
  space. 
  Peritheca 
  present 
  on 
  the 
  under 
  side 
  

   of 
  the 
  colony, 
  and 
  usually 
  strongly 
  wrinkled. 
  

  

  Favosites 
  venustus 
  (Hall)^ 
  (Fig. 
  34). 
  Astrocerium 
  venus- 
  

   tum 
  Hall 
  (1852. 
  Pa/. 
  A^. 
  F. 
  2:120, 
  pi. 
  34) 
  

  

  Distinguishing 
  characters. 
  Hemispheric 
  or 
  spheroidal 
  form, 
  be- 
  

   ginning 
  growth 
  on 
  other 
  bodies 
  ; 
  small 
  corallites 
  increasing 
  in 
  num- 
  

   ber 
  by 
  interstitial 
  addition; 
  12 
  ascending 
  septal 
  spines 
  between 
  

   tabulae; 
  corallites 
  from 
  .9 
  to 
  i 
  mm 
  in 
  diameter; 
  heads 
  often 
  up 
  to 
  

   2 
  or 
  3 
  feet 
  in 
  diameter. 
  

  

  ^These 
  species 
  are 
  regarded 
  by 
  Whiteaves 
  and 
  Lambe 
  as 
  synonyms 
  of 
  

   Favosites 
  hisingeri 
  E. 
  and 
  H. 
  

  

  