﻿138 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Fig. 
  31 
  Cyathophyllum 
  

   Fig. 
  30 
  Zaphrentis 
  turbin 
  ata 
  hydrau 
  I 
  icum 
  

  

  Genus 
  cyathophyllum 
  Goldfuss 
  

  

  [Ety. 
  : 
  xoaOo<^, 
  a 
  cup; 
  ^oXXov, 
  a 
  leaf 
  (septum) 
  ] 
  

  

  (1826. 
  Petre 
  facta 
  Ger 
  maniac, 
  p. 
  54) 
  

  

  Corallum 
  normally 
  simple, 
  the 
  individuals 
  conic, 
  or 
  conico-cylin- 
  

   dric. 
  Septa 
  well 
  developed, 
  radially 
  arranged, 
  the 
  larger 
  extending 
  

   to 
  the 
  center, 
  where 
  they 
  are 
  twisted 
  into 
  a 
  pseudocolumella. 
  Cos- 
  

   tae 
  usually 
  obsolete. 
  Tabulae 
  present 
  but 
  only 
  in 
  the 
  center 
  of 
  the 
  

   visceral 
  chamber, 
  the 
  outer 
  area 
  being 
  filled 
  with 
  vesicular 
  dissepi- 
  

   ments. 
  Exterior 
  covered 
  with 
  an 
  epitheca. 
  

  

  Cyathophyllum 
  hydraulicum 
  Simpson. 
  (Fig. 
  31) 
  Grabau. 
  Geol. 
  

   soc. 
  Am. 
  Bui. 
  11:364, 
  pi. 
  21, 
  fig. 
  la-d. 
  

  

  Distingidshing 
  characters. 
  Simple, 
  conico-cylindric, 
  slender, 
  

   sometimes 
  curved; 
  growth 
  irregular 
  with 
  abrupt 
  changes 
  in 
  direc- 
  

   tion; 
  strongly 
  costate 
  adult 
  portion; 
  non-costate 
  young; 
  well 
  de- 
  

   veloped 
  epitheca, 
  which 
  often 
  shows 
  coarse 
  wrinkles; 
  calyx 
  some- 
  

   what 
  less 
  deep 
  than 
  its 
  diameter; 
  numerous 
  strong 
  thin 
  and 
  rather 
  

   widely 
  separated 
  septa, 
  meeting 
  in 
  center 
  where 
  they 
  are 
  slightly 
  

   twisted, 
  and 
  not 
  infrequently 
  uniting 
  before 
  they 
  reach 
  the 
  center; 
  

   well 
  developed 
  dissepimental 
  structures. 
  

  

  Found 
  abundantly 
  in 
  the 
  upper 
  Manlius 
  limestone 
  of 
  the 
  Niagara 
  

   region, 
  but 
  only 
  as 
  external 
  molds 
  in 
  the 
  Hmestone. 
  Gutta 
  percha 
  

   casts 
  however 
  show 
  the 
  characters 
  well. 
  

  

  