﻿592 
  

  

  DB. 
  W. 
  EEASEE 
  HUME 
  ON 
  

  

  [Dec. 
  1897, 
  

  

  Class. 
  

  

  Central 
  Division. 
  

  

  Eastern 
  Division. 
  

  

  Pisces 
  

  

  Oxyrhina 
  3£antelli, 
  Ag., 
  

   Ptyclwdus 
  latissimus, 
  Ag., 
  

   Pt. 
  decurrens,Ag., 
  Pt.mam- 
  

   millaris, 
  Ag., 
  Corax 
  fal- 
  

   catus, 
  Ag., 
  Lamna 
  sulcata, 
  

   Ag., 
  Lamna 
  appendicu- 
  

   lata 
  (Ag.). 
  

  

  

  

  Cephalopoda 
  

  

  Ammonites 
  [Pachydiscus] 
  

   lewesiensis, 
  Mant. 
  (Tate). 
  

  

  

  Gasteropoda 
  

  

  pelectpoda: 
  

  

  JSfatica 
  sp., 
  and 
  others 
  un- 
  

   described. 
  

  

  Trigonia 
  crenulata, 
  Lam., 
  

   Tr. 
  Dcedalea, 
  Park., 
  Car- 
  

   dium 
  gibbosum, 
  Tate, 
  Ana- 
  

   Una 
  Royana 
  (d'Orb.). 
  

  

  

  

  Monoinyaria 
  

  

  Exogyra 
  columba, 
  Lain, 
  

   (large), 
  Ostrea 
  [Alectryo- 
  

   nia\ 
  carinata, 
  Lam., 
  0. 
  

   canaliculata, 
  Sow., 
  0. 
  

   semiplana, 
  Sow., 
  Pecten 
  

   \_Chlamys~] 
  asper, 
  Lam., 
  P. 
  

   \Janira~\ 
  quinquecostatus, 
  

   Sow., 
  P. 
  [Janira~] 
  cequi- 
  

   costatus, 
  Lam. 
  

  

  JExogyra 
  columba, 
  Lam., 
  

   Ostrea 
  semiplana, 
  Sow., 
  

   0. 
  carinata, 
  Lam., 
  Pecten 
  

   [Lanira] 
  quinquecostatus, 
  

   Sow. 
  

  

  Brachiopoda 
  

  

  Waldheimia 
  hibemica, 
  Tate. 
  

  

  Rliynclionella 
  ScJdoenbachi, 
  

   Dav. 
  

  

  Vermes 
  

  

  Vermicularia 
  concava, 
  Sow. 
  

   Callianassa 
  sp. 
  

  

  Vermicularia 
  concava, 
  Sow. 
  

  

  Catopygus 
  columbarius, 
  

   d'Orb. 
  

  

  Crustacea 
  

  

  ECHINODERMATA 
  . 
  

   FORAMINIFERA 
  ... 
  

  

  Patellina 
  [Orbitolina^ 
  con- 
  

   cava, 
  Lam. 
  

  

  aspect. 
  It 
  is 
  true 
  that 
  Ostrea 
  semiplana, 
  a 
  common 
  Turonian 
  

   fossil 
  in 
  England, 
  has 
  been 
  recorded 
  by 
  both 
  Tate 
  and 
  Barrois, 
  and 
  

   I 
  have 
  obtained 
  it 
  at 
  the 
  very 
  snmmit 
  of 
  the 
  zone 
  in 
  Island 
  magee, 
  

   but 
  it 
  is 
  impossible 
  at 
  present 
  to 
  say 
  whether 
  the 
  association 
  at 
  

   this 
  point 
  is 
  not 
  due 
  to 
  the 
  mixing 
  of 
  the 
  two 
  zones 
  at 
  the 
  uncon- 
  

   formable 
  junction. 
  

  

  The 
  fishes 
  above 
  mentioned 
  are 
  also 
  of 
  common 
  occurrence 
  in 
  

   the 
  Turonian 
  strata, 
  but 
  they 
  equally 
  occur 
  in 
  the 
  Cenomanian, 
  

   Ptychodus 
  decurrens 
  being 
  especially 
  frequent 
  in 
  the 
  latter. 
  

  

  The 
  view 
  here 
  set 
  forth 
  receives 
  further 
  support 
  when 
  the 
  con- 
  

   ditions 
  prevalent 
  in 
  France 
  during 
  Cenomanian 
  time 
  are 
  specially 
  

   considered. 
  Thus 
  in 
  the 
  province 
  of 
  Maine 
  is 
  a 
  thick 
  series 
  of 
  sands, 
  

   the 
  Sables 
  du 
  Maine, 
  which 
  enclose 
  among 
  other 
  fossils 
  Orbitolina 
  

   concava, 
  Lam., 
  Trigonia 
  crenulata, 
  Lam., 
  Tr. 
  Dcedalea, 
  Park., 
  Am- 
  

   monites 
  \Acanthoceras~\ 
  rotomagensis 
  (Defr.), 
  A. 
  Mantelli, 
  Sow., 
  and 
  

   Catopygus 
  columbarius, 
  Lam. 
  

  

  In 
  the 
  Perche 
  district, 
  the 
  Sables 
  du 
  Perche, 
  which 
  contain 
  Am- 
  

   monites 
  \_Acanthoceras~] 
  navicidaris 
  (Sow.), 
  Ostrea 
  carinata, 
  Lam., 
  

   Eocogyra 
  columba, 
  Lam., 
  Wiynclionella 
  compressa, 
  Lam., 
  and 
  Trigonia 
  

  

  