﻿226 
  

  

  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  

  

  Pisces. 
  — 
  Gyrodus 
  Cuvieri, 
  Hybodus 
  striatus, 
  Ischyodus 
  Egertoni, 
  

   I. 
  Towns7iendii, 
  and 
  Pycnodus 
  pagoda 
  are 
  the 
  4 
  genera 
  and 
  5 
  species 
  

   known. 
  Gyrodus 
  Cuvieri 
  also 
  occurs 
  in 
  the 
  Coral 
  Rag. 
  

  

  Reptilia. 
  — 
  Ceteosaurus 
  longus, 
  Megalosaurus 
  Bucklandi, 
  Gonio- 
  

   pholis 
  sp., 
  Plesiosaurus 
  carinatus, 
  P. 
  winspitensis, 
  and 
  Pliosaurus 
  port- 
  

   landicus 
  are 
  all 
  the 
  Reptilia 
  known. 
  Except 
  Meg. 
  Bucklandi 
  all 
  

   are 
  strictly 
  Portlandian. 
  

  

  Table 
  XLIII. 
  — 
  Analysis 
  and 
  Distribution 
  of 
  the 
  Portlandian 
  Species. 
  

  

  Classes. 
  

  

  Plantoe. 
  ^ 
  

  

  Amorphozoa. 
  )■ 
  None 
  

  

  Rhizopoda. 
  J 
  

  

  Ccelenterata 
  

  

  Echinodermata 
  

  

  Annelida 
  

  

  Crustacea 
  

  

  Bryozoa 
  (none). 
  

  

  Brachiopoda 
  

  

  35 
  genera 
  f 
  Monomyaria 
  

  

  and 
  j 
  

   74 
  species. 
  [ 
  Diniyaria 
  

  

  Gasteropoda 
  

  

  (Ammonites 
  

   Nautili. 
  ^ 
  

   Belemnites. 
  ^None. 
  

   Teuthidae. 
  ) 
  

  

  Pisces 
  

  

  Reptilia 
  

  

  Mammalia 
  (none). 
  

  

  o 
  

  

  1 
  

  

  2 
  

   1 
  

  

  1 
  

  

  3 
  

  

  9 
  

  

  26 
  

   10 
  

  

  1 
  

  

  63 
  

  

  1 
  

   3 
  

   4 
  

   2 
  

  

  3 
  

   19 
  

  

  55 
  

   19 
  

   11 
  

  

  128 
  

  

  No 
  Species 
  in 
  any 
  

  

  » 
  Class 
  passes 
  to 
  

  

  higher 
  strata. 
  

  

  The 
  accompanying 
  Table 
  XLIV. 
  shows 
  at 
  once 
  the 
  numerical 
  

   value 
  of 
  the 
  whole 
  fauna 
  and 
  flora 
  of 
  the 
  British 
  Jurassic 
  rocks 
  ; 
  the 
  

  

  