﻿206 
  H. 
  S. 
  Williams 
  — 
  Silurian- 
  Devonian 
  houndary 
  

  

  in 
  a 
  massive 
  brown 
  sandstone 
  and 
  argillaceous 
  layers 
  stratified 
  

   therewith. 
  Its 
  comparison 
  with 
  other 
  faunas 
  links 
  it 
  with 
  the 
  

   so-called 
  Oriskany 
  of 
  the 
  Moose 
  River 
  region 
  further 
  west, 
  

   and 
  also 
  with 
  the 
  early 
  beds 
  of 
  the 
  Gaspe 
  sandstone 
  further 
  

   east. 
  For 
  this 
  general 
  region 
  it 
  is 
  a 
  representative 
  of 
  the 
  tran- 
  

   sition 
  zone 
  from 
  calcareous 
  formations, 
  which 
  are 
  unmistakably 
  

   Lower 
  Helderberg 
  in 
  age, 
  up 
  to 
  coarse 
  gray 
  and 
  red 
  sandstones 
  

   containing 
  Devonian 
  plants, 
  reported 
  to 
  be 
  seven 
  thousand 
  feet 
  

   thick 
  on 
  the 
  Gaspe 
  peninsula 
  and 
  to 
  represent 
  the 
  Old 
  Red 
  

   sandstone 
  phase 
  of 
  the 
  Devonian 
  system. 
  

  

  The 
  fauna 
  contains 
  some 
  twenty-five 
  or 
  thirty 
  good 
  species, 
  

   a 
  few 
  of 
  which 
  can 
  be 
  identified 
  with 
  species 
  of 
  the 
  Tilestone 
  

   and 
  Upper 
  Arisaig 
  faunas 
  already 
  described. 
  A 
  few 
  Gaspe 
  

   species 
  described 
  by 
  Billings 
  are 
  closely 
  approached 
  : 
  but, 
  as 
  a 
  

   fauna, 
  the 
  resemblance 
  to 
  the 
  typical 
  Tilestone 
  species 
  of 
  

   Murchison's 
  Silurian 
  system 
  is 
  most 
  striking 
  and 
  suggestive. 
  

  

  The 
  faunas, 
  as 
  reported 
  in 
  my 
  preliminary 
  list, 
  are 
  as 
  follows, 
  

   viz 
  : 
  

  

  Fauna 
  of 
  1099 
  A, 
  south 
  branch 
  of 
  Presque 
  Isle 
  stream 
  in 
  

   Chapman 
  township, 
  Aroostook 
  Co., 
  Me. 
  

  

  Rensselseria 
  (Beachia) 
  n. 
  sp., 
  cf. 
  B. 
  suessana. 
  

  

  Holopea 
  cf. 
  Danai. 
  

  

  Loxonema 
  cf. 
  planogyrata. 
  

  

  Pleurodictyum 
  sp. 
  

  

  Spirifer 
  gaspensis. 
  

  

  Orthonota 
  n. 
  sp. 
  (cf. 
  undulata). 
  

  

  Palseoneilo 
  cf. 
  constricta. 
  

  

  P. 
  cf. 
  plana. 
  

  

  P. 
  cf. 
  maxima. 
  

  

  P. 
  5 
  or 
  6 
  new 
  species. 
  

  

  Sanguinolites 
  n. 
  sp. 
  (cf. 
  clavulus). 
  

  

  Leiopteria, 
  six 
  species. 
  

  

  Pterinea 
  rectangularis 
  (cf. 
  flabellum). 
  

  

  P. 
  (three 
  species). 
  

  

  Cf. 
  Glyptodesma 
  sp. 
  

  

  Cypricardella 
  cf. 
  gregarius. 
  

  

  Nucula 
  (n. 
  sp.). 
  

  

  Beyrichia 
  tuberculata 
  Kloden. 
  

  

  Psilophyton 
  princeps. 
  

  

  Stem 
  large 
  plant. 
  

  

  The 
  second 
  fauna, 
  1099 
  C, 
  is 
  from 
  Edmund's 
  Hill, 
  in 
  the 
  northern 
  

   part 
  of 
  the 
  same 
  township 
  : 
  . 
  

  

  Rensselaaria 
  (Beachia) 
  n. 
  sp. 
  cf. 
  suessana. 
  

   Spirifer 
  arrectus, 
  cf 
  . 
  " 
  cyctopterus 
  " 
  Billings. 
  

   S. 
  cf. 
  concinnus. 
  

  

  Homalonotus 
  cf. 
  Yanuxemi. 
  

  

  