﻿50 
  G. 
  R. 
  VINE 
  ON 
  THE 
  WENLOCK 
  POLTZOA. 
  

  

  The 
  Polyzoa 
  of 
  the 
  Wenlock 
  Shales, 
  the 
  Wenlock 
  Limestone, 
  and 
  

   Shales 
  over 
  Wenlock 
  Limestone. 
  

  

  Class 
  POLYZOA, 
  J. 
  V. 
  Thompson. 
  

  

  Order 
  Gtinol^iata, 
  Allman. 
  

  

  Suborder 
  Cyclostomata, 
  Busk. 
  

  

  Group 
  II. 
  Incrustata, 
  d'Orbigny. 
  

  

  InarticulatcB 
  s. 
  Adfiocoe, 
  Busk, 
  Crag 
  Polyzoa. 
  

  

  Inarticulata, 
  Busk, 
  Brit. 
  Mus. 
  Cat. 
  pt. 
  iii. 
  

  

  " 
  Zoarium 
  calcareous, 
  continuous, 
  not 
  divided 
  by 
  corneous 
  joints, 
  

   or 
  furnished 
  with 
  radical 
  tubes 
  ; 
  erect 
  and 
  attached 
  by 
  a 
  contracted 
  

   base, 
  or 
  recumbent 
  and 
  immediately 
  adnate, 
  either 
  wholly 
  or 
  in 
  

   part 
  " 
  (Hincks, 
  Brit. 
  Mar. 
  Polyzoa, 
  p. 
  424). 
  

  

  Genus 
  Stomatopora, 
  Bronn. 
  

  

  1821. 
  Alecto, 
  Lamx. 
  (1814, 
  introduced 
  by 
  Leach 
  for 
  a 
  genus 
  of 
  

  

  Echinoderms). 
  

   1825. 
  Stomatopora, 
  Bronn 
  ; 
  d'Orbigny 
  (for 
  uniserial 
  species). 
  

  

  Zoarium 
  creeping, 
  adnate, 
  irregularly 
  branched. 
  Zooecia 
  in 
  single 
  

   series. 
  

  

  1. 
  Stomatopora 
  dissimilis, 
  Vine. 
  

  

  Stomatopora 
  dissimilis, 
  Vine, 
  Quart. 
  Journ. 
  Geol. 
  Soc. 
  vol. 
  xxxvii. 
  

   p. 
  615. 
  

  

  This 
  species 
  has 
  already 
  been 
  fully 
  described 
  and 
  illustrated 
  

   in 
  a 
  paper 
  read 
  before 
  the 
  Geological 
  Society, 
  and 
  published 
  as 
  

   above. 
  

  

  Locality. 
  Buildwas 
  Beds, 
  near 
  base 
  of 
  Wenlock 
  Shale. 
  Washings 
  

   nos. 
  22, 
  36, 
  38. 
  Mr. 
  Davidson's 
  list, 
  no. 
  10. 
  

  

  2. 
  Stomatopora 
  dissimilis, 
  Vine, 
  var. 
  a, 
  elongata. 
  

  

  Zoarium 
  very 
  irregular, 
  clustering. 
  Zooecia 
  elongated, 
  with, 
  at 
  

   times, 
  long 
  stoloniferous 
  processes 
  which 
  intermingle 
  with 
  the 
  cells. 
  

   When 
  colonial 
  growth 
  is 
  distinct, 
  arrangement 
  of 
  cells 
  linear 
  and 
  

   uniserial. 
  Measured 
  under 
  favourable 
  circumstances, 
  about 
  three 
  

   cells 
  occupy 
  the 
  space 
  of 
  one 
  line. 
  

  

  The 
  variety 
  of 
  this 
  species 
  which 
  I 
  distinguish 
  by 
  the 
  name 
  

   elongata, 
  is 
  present 
  in 
  the 
  various 
  washings 
  in 
  which 
  the 
  S. 
  dis- 
  

   similis 
  is 
  found. 
  Its 
  distinguishing 
  peculiarities 
  are 
  its 
  elon- 
  

   gated 
  cells 
  and 
  its 
  clustering 
  habit. 
  

  

  Locality. 
  Buildwas 
  Beds. 
  Washings 
  nos. 
  22, 
  36, 
  40. 
  

  

  The 
  uniserial 
  Stomatoporce 
  of 
  the 
  Wenlock 
  Limestone 
  have 
  been 
  

   noticed 
  or 
  alluded 
  to 
  by 
  Lonsdale, 
  Salter, 
  M'Coy, 
  and 
  other 
  

   workers 
  on 
  the 
  fossils 
  of 
  the 
  Palaeozoic 
  era 
  ; 
  but 
  neither 
  in 
  the 
  

   ' 
  Silurian 
  System 
  ' 
  nor 
  in 
  ' 
  Siluria 
  ' 
  is 
  there 
  any 
  detailed 
  account 
  of 
  

   the 
  species. 
  

  

  