﻿288 
  Geological 
  Society. 
  

  

  PROCEEDINGS 
  OF 
  LEARNED 
  SOCIETIES. 
  

  

  GEOLOGICAL 
  SOCIETY. 
  

  

  November 
  21, 
  1888.— 
  W. 
  T. 
  Blanford, 
  LL.D., 
  F.R.S., 
  

   President, 
  in 
  the 
  Chair. 
  

  

  The 
  following 
  communications 
  were 
  read 
  : 
  — 
  

  

  1. 
  "Notes 
  on 
  the 
  Remains 
  and 
  Affinities 
  of 
  five 
  Genera 
  of 
  Meso- 
  

   zoic 
  Reptiles." 
  By 
  R. 
  Lydekker, 
  Esq., 
  B.A., 
  F.G.S. 
  

  

  This 
  paper 
  was 
  divided 
  into 
  five 
  sections. 
  In 
  the 
  first 
  the 
  Author 
  

   described 
  the 
  dorsal 
  vertebra 
  of 
  a 
  small 
  Dinosaur 
  from 
  the 
  Cam- 
  

   bridge 
  Greensand, 
  which 
  he 
  regarded 
  as 
  probably 
  identical 
  with 
  the 
  

   genus 
  Syngonosaurus, 
  Seeley. 
  Reasons 
  were 
  then 
  given 
  for 
  regard- 
  

   ing 
  this 
  form 
  as 
  being 
  a 
  member 
  of 
  the 
  Scelidosauridas, 
  stress 
  being 
  

   laid 
  on 
  the 
  absence 
  of 
  a 
  costal 
  facet 
  on 
  the 
  centrum. 
  

  

  The 
  second 
  section 
  described 
  an 
  axis 
  vertebra 
  from 
  the 
  "VVealden 
  

   of 
  the 
  Isle 
  of 
  Wight, 
  which 
  is 
  evidently 
  Dinosaurian, 
  and 
  may 
  

   possibly 
  belong 
  to 
  Megalosaurus. 
  It 
  is 
  remarkable 
  for 
  exhibiting 
  

   an 
  intercentrum 
  on 
  its 
  anterior 
  aspect, 
  and 
  also 
  for 
  the 
  absence 
  of 
  

   anchylosis 
  between 
  its 
  centrum 
  and 
  that 
  of 
  the 
  atlas. 
  

  

  In 
  the 
  third 
  section 
  the 
  femur 
  of 
  a 
  small 
  Iguanodont 
  from 
  the 
  

   Oxford 
  Clay, 
  in 
  the 
  possession 
  of 
  A. 
  R. 
  Leeds, 
  Esq., 
  was 
  described. 
  

   This 
  specimen 
  agrees 
  with 
  Hypsilopliodoa 
  and 
  Oamptosaurus 
  in 
  its 
  

   pendent 
  inner 
  trochanter, 
  and 
  it 
  was 
  referred 
  to 
  the 
  latter 
  genus 
  as 
  

   G. 
  Leedsi. 
  It 
  is 
  also 
  considered 
  to 
  be 
  closely 
  allied 
  to 
  Iguanodon 
  

   Prestwichi 
  — 
  the 
  type 
  of 
  Cumnoria 
  of 
  Seeley 
  — 
  which 
  is 
  also 
  considered 
  

   to 
  belong 
  to 
  the 
  American 
  genus. 
  The 
  name 
  Oamptosaurus 
  val- 
  

   densis 
  was 
  applied 
  to 
  an 
  allied 
  form 
  from 
  the 
  Wealden 
  ; 
  and 
  the 
  

   name 
  Gryptodraco 
  proposed 
  to 
  replace 
  Cryptosaurus. 
  

  

  The 
  imperfect 
  skeleton 
  of 
  a 
  Sauropterygian 
  from 
  the 
  Oxford 
  Clay 
  

   near 
  Bedford, 
  which 
  formed 
  the 
  subject 
  of 
  a 
  previous 
  communica- 
  

   tion, 
  w 
  r 
  as 
  redescribed. 
  This 
  specimen 
  was 
  identified 
  with 
  Flesiosauru$ 
  

   philarchus, 
  Seeley, 
  which 
  it 
  was 
  proposed 
  to 
  refer 
  to 
  a 
  new 
  genus 
  

   under 
  the 
  name 
  of 
  Peloneustus. 
  This 
  genus 
  was 
  shown 
  to 
  be 
  allied 
  

   to 
  Pliosawrus, 
  and 
  to 
  be 
  represented 
  by 
  forms 
  in 
  the 
  Kimmeridge 
  

   Clay 
  which 
  have 
  been 
  described 
  as 
  Plesiosaurus 
  cequah's 
  and 
  P. 
  ste~ 
  

   nodirus. 
  It 
  was 
  also 
  compared 
  with 
  the 
  genus 
  Thaumatosaurus, 
  

   Meyer, 
  from 
  which 
  Rhomaleosaurus 
  of 
  Seeley 
  was 
  considered 
  inse- 
  

   parable. 
  Some 
  remarks 
  were 
  added 
  on 
  other 
  Sauropterygians 
  ; 
  and 
  

   it 
  was 
  proposed 
  to 
  adopt 
  the 
  name 
  Cimoliosaurus 
  for 
  all 
  the 
  forms 
  

   having 
  a 
  pectoral 
  girdle 
  of 
  the 
  type 
  described 
  under 
  the 
  names 
  of 
  

   EJasmosaurus 
  and 
  Colymbosaurus, 
  and 
  with 
  single 
  costal 
  facets 
  to 
  

   the 
  cervical 
  vertebra?. 
  

  

  The 
  paper 
  concluded 
  with 
  a 
  notice 
  of 
  the 
  affinities 
  of 
  the 
  Croco- 
  

   dilian 
  genus 
  Geosaurus. 
  This 
  form 
  was 
  shown 
  to 
  be 
  closely 
  allied 
  to 
  

   MetHorhynchus, 
  both 
  being 
  characterized 
  by 
  the 
  absence 
  of 
  dermal 
  

   scutes 
  and 
  the 
  presence 
  of 
  bony 
  plates 
  in 
  the 
  sclerotic. 
  It 
  was 
  also 
  

   shown 
  that 
  some 
  of 
  the 
  species 
  of 
  Cricosaurus 
  belong 
  to 
  the 
  former 
  

   genus 
  ; 
  while 
  there 
  appear 
  to 
  be 
  no 
  grounds 
  by 
  which 
  Dacosaurus 
  

   (Pksiosuchus) 
  can 
  be 
  separated 
  from 
  the 
  same. 
  

  

  