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  PROCEEDINGS 
  OF 
  THE 
  MALACOLOGICAL 
  SOClhJ'i'Y. 
  

  

  Aptian 
  (zone 
  of 
  Belemnites 
  Brunsviciensis). 
  Ceplialopoda 
  : 
  

   Belemnites 
  Brunsviciensis, 
  Jasikowi, 
  ohtiisirostris 
  ; 
  Crioceras. 
  

   Gastropoda 
  : 
  Rostellaria 
  Parhinsoni. 
  Pelecypoda 
  : 
  Cucidlcea 
  

   securis, 
  Isocardia 
  angulata, 
  Nucula 
  siihangulata, 
  JExogyra. 
  

   Neocomian 
  (zone 
  of 
  Belemnites 
  j 
  a 
  cuhim). 
  Cephalopoda: 
  Belem- 
  

   nites 
  jacuhim, 
  Jasikowi, 
  cristatus, 
  subquadratus 
  ; 
  Olcostephanus 
  

   umbonatus, 
  Decheni, 
  discofalcatus, 
  progrediens, 
  Spectonensis, 
  con- 
  

   cimius, 
  Payeri, 
  inversus, 
  subinversus, 
  versicolor, 
  Astieri, 
  sidcosui 
  ; 
  

   Crioceras; 
  Anvgloceras 
  Matheroni 
  ; 
  ITolcodiscus 
  rotula 
  ; 
  Hoplites 
  

   regalis, 
  ambhjgonius, 
  Vaceki, 
  munitus. 
  Gastropoda 
  : 
  Rostellaria 
  ; 
  

   Troclius 
  pidcherrimus. 
  Pelecj'poda 
  : 
  Inoceramus 
  venusttdus 
  ; 
  

   Pecten 
  Ilorini, 
  cinctus. 
  

   Transitional 
  Beds 
  between 
  Neocomian 
  and 
  Uppermost 
  Jurassic 
  

   (zone 
  of 
  Belemnites 
  lateralis). 
  Cephalopoda 
  : 
  Belemnites 
  lateralis, 
  

   subquadratus, 
  explanatus, 
  Itussieusis 
  ; 
  Olcostephanus 
  bidicliotomus 
  

   cf. 
  Gravesi, 
  Keyserlingi, 
  Lamplughi, 
  fragilis 
  ; 
  Hoplites 
  amhlygonus, 
  

   hystrix, 
  munitus. 
  Pelecypoda: 
  Pecten 
  cinctus 
  ; 
  Exogyra 
  sinuata 
  ; 
  

   Astarte 
  senecta. 
  Coprolite 
  Bed 
  — 
  Ceplialopoda 
  : 
  Perispliinctes 
  

   Panderi, 
  TchernyscJiovi, 
  scythicus, 
  dorsoplanus. 
  

   Upper 
  Kimeridge. 
  Cephalopoda: 
  Belemnites 
  niagnificus 
  ; 
  Peri- 
  

   sphinctes 
  virgatus, 
  Pallasi. 
  Pelecypoda 
  : 
  Lucina 
  minuscida, 
  Ostrea 
  

   gibbosa. 
  

   The 
  Gault 
  deposits 
  of 
  the 
  Cretaceous 
  Series 
  have 
  long 
  been 
  studied 
  

   by 
  various 
  investigators, 
  their 
  development 
  being 
  mostly 
  known 
  in 
  

   South 
  of 
  England 
  localities, 
  and 
  prominently 
  in 
  the 
  neighbourhood 
  of 
  

   Folkestone 
  (Copt 
  Point 
  and 
  Eastwear 
  Bay). 
  To 
  the 
  late 
  Mr. 
  De 
  

   Ranee 
  ^ 
  is 
  due 
  the 
  credit 
  for 
  having 
  first 
  attempted 
  their 
  systematic 
  

   zoning 
  at 
  Folkestone, 
  Ammonite 
  species 
  being 
  mainly 
  used 
  as 
  tlie 
  

   index 
  -fossils 
  of 
  the 
  zones. 
  He 
  recognized 
  the 
  Continental 
  term 
  

   ' 
  Albian 
  ' 
  for 
  this 
  series 
  of 
  deposits, 
  and 
  subdivided 
  them 
  into 
  eleven 
  

   zones, 
  which 
  were 
  grouped 
  as 
  'Upper' 
  and 
  'Lower 
  Albian'. 
  Tlie 
  

   zones 
  Avith 
  a 
  few 
  of 
  their 
  characteristic 
  Mollusca 
  were 
  listed 
  as 
  

   follows 
  : 
  — 
  

  

  Upper 
  Albian 
  (zone 
  of 
  Ammonites 
  Goodhalli 
  and 
  A. 
  rostraim). 
  

   Cephalopoda: 
  Ammonites 
  Goodhalli 
  ; 
  Belemnites 
  ultimus. 
  Pelecy- 
  

   poda 
  : 
  Pecten 
  orbicidaris. 
  (Zone 
  of 
  Ammonites 
  circularis 
  and 
  

   Kingena 
  lima.) 
  Cephalopoda: 
  Ammonites 
  cristatus, 
  varicosns 
  ; 
  

   Belemnites 
  (minimus) 
  ultimus; 
  Ilamdes 
  armatus, 
  attenuatiis. 
  

   Pelecypoda 
  : 
  Nucula 
  ovata, 
  bivirgata 
  ; 
  Pecten 
  asper. 
  (Zone 
  of 
  

   Naidilus 
  Beslongchampsianus. 
  ) 
  

  

  Lower 
  Albian 
  (zone 
  of 
  Ammonites 
  Beudanti). 
  Cephalopoda 
  : 
  

   Ammonites 
  versicostatus. 
  Gastropoda 
  : 
  Rostellaria 
  allied 
  to 
  

   pyrenaica 
  ; 
  Pleurotomaria 
  Gibbsi. 
  (Zone 
  of 
  Ammonites 
  auritus.) 
  

   Cephalopoda 
  : 
  Hamites 
  simplex. 
  Gastropoda 
  : 
  Acteon 
  affinis 
  ; 
  

   Avellana 
  injlata 
  ; 
  Rostellaria 
  Robinaldina, 
  carinella, 
  cingulata 
  ; 
  

   Acmcba 
  tenuicosta 
  ; 
  Turbo 
  allied 
  to 
  Yomunus. 
  Pelecypoda: 
  

   Pecten 
  quinquccostcdus. 
  (Zone 
  of 
  Ammonites 
  denarius.) 
  (Zone 
  

   of 
  Waidilus 
  Clementinus.) 
  Cephalopoda 
  : 
  Hamites 
  tubercidatns, 
  

  

  ' 
  Geological 
  Magazine, 
  p. 
  163, 
  1868. 
  

  

  