﻿OF 
  CARBONIFEROUS 
  GASTEROPODA. 
  <)*25 
  

  

  EXPLANATION 
  OF 
  PLATE 
  XX. 
  

  

  Figs. 
  1, 
  2. 
  Orthonema 
  pygmceum, 
  sp. 
  n., 
  Glencart, 
  Dairy: 
  1, 
  front 
  view, 
  X 
  12; 
  

   2, 
  back, 
  x 
  15. 
  

   3, 
  4. 
  Orthonema 
  (?) 
  Youngianum, 
  sp. 
  n., 
  Glencart, 
  Dairy. 
  X 
  12. 
  

  

  5. 
  Murchisonia 
  (Goniostropha) 
  turriciolata, 
  De 
  Kon., 
  Abbey 
  Foss, 
  Ask- 
  

   rigg. 
  X 
  3. 
  

  

  6. 
  ( 
  ) 
  , 
  var. 
  scotica, 
  Dairy. 
  X 
  8. 
  

  

  7, 
  8. 
  ( 
  ) 
  subtilistriata, 
  sp. 
  n., 
  Grlencart, 
  Dairy 
  : 
  7, 
  adult, 
  X 
  (3 
  ; 
  

  

  8, 
  fragment 
  of 
  young 
  shell, 
  X 
  8. 
  

  

  9-13. 
  (Stegoccelia) 
  coiwpacta, 
  sp. 
  n., 
  Glencart, 
  Dairy 
  : 
  9, 
  back 
  view, 
  

  

  X 
  12 
  ; 
  1.0, 
  apex, 
  X 
  10 
  ; 
  11, 
  mouth, 
  enlarged, 
  showing 
  reflected 
  

   inner 
  lip, 
  outer 
  lip 
  broken 
  ; 
  12, 
  young 
  shell 
  showing 
  open 
  umbi- 
  

   licus, 
  X 
  10: 
  13, 
  X 
  12. 
  

  

  2z2 
  

  

  