﻿208 
  

  

  MISS 
  G. 
  L. 
  ELLES 
  ON 
  THE 
  SUBGENERA 
  [May 
  1 
  89 
  7, 
  

  

  There 
  are 
  no 
  indications 
  of 
  the 
  presence 
  of 
  a 
  septum. 
  The 
  

   virgula 
  is, 
  as 
  a 
  rule, 
  prolonged 
  beyond 
  the 
  distal 
  extremity. 
  Its 
  

   course 
  is 
  similar 
  to 
  that 
  described 
  in 
  the 
  case 
  of 
  0. 
  cometa 
  (Gein.). 
  

  

  Table 
  of 
  Measurements. 
  

  

  Spec. 
  nov. 
  

  

  Lgth. 
  

  

  L. 
  of 
  

  

  sic. 
  

  

  L. 
  l\ 
  

  

  W. 
  opp. 
  

   I 
  1 
  . 
  

  

  Opp. 
  3 
  1 
  . 
  

  

  No. 
  of 
  

   thecag. 
  

  

  Localities 
  

   (Moffat 
  District). 
  

  

  P[1882] 
  ... 
  

   P[1875] 
  ... 
  

   B 
  

  

  7 
  

   T2~ 
  

  

  7 
  

  

  ft 
  

  

  5 
  

  

  12" 
  

  

  tV 
  

  

  TB 
  

  

  

  i 
  

  

  i 
  

   s 
  

  

  14 
  

  

  17 
  

  

  30? 
  

   9 
  

  

  Frenchland 
  Burn. 
  

   Duffkinnell 
  Burn. 
  

   Dobb's 
  Linn. 
  

   Duffkinnell 
  Burn. 
  

  

  D 
  

  

  

  Horizon. 
  — 
  The 
  specimens 
  obtained 
  from 
  Dobb's 
  Linn 
  and 
  Belcraig 
  

   Burn 
  were 
  found 
  just 
  below 
  the 
  zone 
  of 
  0. 
  cometa 
  (Gein.), 
  but 
  the 
  

   species 
  probably 
  ranges 
  up 
  into 
  the 
  latter 
  zone. 
  

  

  British 
  Localities. 
  — 
  All 
  the 
  specimens 
  known 
  to 
  me 
  were 
  found 
  

   in 
  the 
  Moffat 
  district 
  ; 
  they 
  come 
  from 
  Dobb's 
  Linn, 
  Belcraig 
  Burn, 
  

   Frenchland 
  Burn, 
  and 
  the 
  Duffkinnell 
  Burn 
  near 
  Wamphray. 
  

  

  Table 
  showing 
  Ratio 
  of 
  Thecal 
  

  

  Length 
  and 
  Breadth 
  in 
  the 
  

  

  yariotjs 
  Species. 
  

  

  Species. 
  

  

  P. 
  palmeus, 
  var. 
  tenuis 
  

  

  P. 
  palmeus 
  

  

  P. 
  p. 
  var. 
  ovato-elongatus 
  (a) 
  

  

  (b) 
  .. 
  

  

  P. 
  palmeus. 
  var. 
  latus 
  

  

  P. 
  ovatus 
  

  

  P. 
  minor 
  

  

  P. 
  folium 
  

  

  C.petalum 
  ... 
  

  

  C. 
  cometa 
  

  

  Ratio. 
  

  

  Table 
  showing 
  Eatio 
  between 
  

   Thecal 
  Length 
  and 
  Length 
  

  

  OF 
  SlCULA. 
  

  

  Species. 
  

  

  Ratio. 
  

  

  P. 
  palmeus, 
  var. 
  tenuis... 
  

   P. 
  minor 
  

  

  # 
  

  

  2 
  

   1 
  

   1 
  

   1 
  

  

  2 
  

   4 
  

   5 
  

   8 
  

  

  1 
  

   1 
  

  

  1 
  

   1 
  

   1 
  

   ] 
  

   1 
  

   1 
  

   1 
  

  

  P. 
  palmeus 
  

  

  P. 
  p. 
  var. 
  ovato-elongatus 
  

  

  P. 
  p. 
  var. 
  latus 
  

  

  P. 
  ovatus 
  

  

  P. 
  folium 
  

  

  C. 
  petalum 
  

  

  C. 
  cometa 
  

  

  