﻿Geological 
  Society. 
  4 
  $9 
  

  

  bones 
  of 
  a 
  Sauriscbian 
  known 
  in 
  this 
  country. 
  An 
  examination 
  

   showed 
  that 
  the 
  bones 
  of 
  the 
  right 
  and 
  left 
  sides 
  were 
  united 
  in 
  the 
  

   median 
  line 
  almost 
  throughout 
  their 
  length 
  by 
  a 
  median 
  suture, 
  and 
  

   that 
  they 
  formed 
  a 
  saddle-shaped 
  surface 
  internally 
  from 
  front 
  to 
  

   back. 
  After 
  giving 
  a 
  detailed 
  description 
  of 
  the 
  pubis 
  and 
  ischium, 
  

   the 
  Author 
  stated 
  that 
  he 
  was 
  not 
  aware 
  that 
  tbis 
  type 
  of 
  pelvis 
  

   had 
  been 
  previously 
  observed. 
  ' 
  He 
  noted 
  that 
  the 
  anteroposterior 
  

   concavity 
  between 
  the 
  anterior 
  symphysis 
  of 
  the 
  pubic 
  bones 
  and 
  

   the 
  posterior 
  symphysis 
  of 
  the 
  ischia 
  was 
  a 
  well-marked 
  charac- 
  

   teristic 
  of 
  Sauriscbian 
  reptiles, 
  but 
  that 
  it 
  remained 
  to 
  be 
  determined 
  

   to 
  what 
  extent 
  the 
  median 
  union 
  of 
  the 
  pubic 
  bones 
  was 
  developed 
  

   in 
  the 
  group. 
  

  

  It 
  was 
  impossible 
  to 
  judge 
  of 
  the 
  form 
  of 
  the 
  ilium 
  from 
  the 
  

   imperfect 
  fragment 
  preserved, 
  but 
  it 
  did 
  not 
  make 
  any 
  recognizable 
  

   approximation 
  to 
  the 
  bone 
  in 
  those 
  American 
  genera 
  which 
  offered 
  

   the 
  closest 
  resemblance 
  of 
  form 
  to 
  the 
  pubis 
  and 
  ischium. 
  

  

  There 
  were 
  several 
  minor 
  differences 
  of 
  proportion 
  between 
  the 
  

   bones 
  from 
  the 
  Oxford 
  Clay 
  and 
  those 
  from 
  the 
  Wealden 
  of 
  the 
  

   Isle 
  of 
  Wight, 
  aud 
  the 
  former 
  differed 
  in 
  ways 
  pointed 
  out 
  from 
  

   Morosaurus, 
  Diplodocus, 
  and 
  Brontosaurus, 
  though 
  there 
  were 
  re- 
  

   semblances. 
  

  

  April 
  3, 
  1889.— 
  W. 
  T. 
  Blanford, 
  LL.D., 
  F.R.S., 
  

  

  President, 
  in 
  the 
  Chair. 
  

  

  The 
  following 
  communications 
  were 
  read 
  : 
  — 
  

  

  1. 
  "The 
  Basals 
  of 
  Eugeniacrinidse." 
  By 
  F. 
  A. 
  Bather, 
  Esq., 
  

   B.A., 
  E.G.S. 
  

  

  Although 
  Professors 
  Beyrich 
  and 
  v. 
  Zittel 
  had 
  alluded 
  to 
  certain 
  

   specimens 
  of 
  Eutjenhtcrinus 
  as 
  proving, 
  by 
  the 
  course 
  of 
  the 
  axial 
  

   canals, 
  that 
  in 
  this 
  genus 
  the 
  basals 
  had 
  passed 
  up 
  into 
  the 
  radials, 
  

   yet 
  the 
  two 
  chief 
  authorities 
  who 
  subsequently 
  discussed 
  the 
  subject 
  

   practically 
  ignored 
  this 
  argument. 
  M. 
  de 
  Loriol 
  contented 
  himself 
  

   with 
  denying 
  any 
  trace 
  of 
  basals, 
  while 
  Dr. 
  P. 
  H. 
  Carpenter 
  main- 
  

   tained 
  that 
  the 
  top 
  stem-joint 
  represented 
  a 
  fused 
  basal 
  ring. 
  In 
  

   a 
  previous 
  paper 
  the 
  Author 
  had 
  argued 
  in 
  favour 
  of 
  Prof. 
  v. 
  Zittcl's 
  

   view 
  without 
  convincing 
  Dr. 
  Carpenter 
  of 
  its 
  correctness. 
  Such 
  

   scepticism 
  was, 
  no 
  doubt, 
  warranted 
  by 
  the 
  lack 
  of 
  detailed 
  descrip- 
  

   tion 
  and 
  of 
  figures. 
  The 
  object 
  of 
  the 
  present 
  note 
  was 
  to 
  set 
  the 
  

   matter 
  at 
  rest 
  by 
  describing 
  and 
  figuring 
  certain 
  dorsal 
  cups 
  of 
  

   Eug. 
  caryoplajttatus 
  kindly 
  lent 
  to 
  the 
  Author 
  by 
  Prof, 
  von 
  Zittel. 
  

  

  Owing 
  to 
  the 
  mode 
  of 
  fossilization 
  the 
  canal-system 
  is 
  plainly 
  

   seen. 
  The 
  axial 
  canal 
  passes 
  up 
  into 
  the 
  radial 
  circlet 
  and 
  gradually 
  

   widens 
  ; 
  at 
  a 
  short 
  distance 
  below 
  the 
  floor 
  of 
  the 
  calycal 
  cavity 
  it 
  

   gives 
  off 
  five 
  interradial 
  branches 
  ; 
  these 
  soon 
  bifurcate, 
  aud 
  the 
  

   adjacent 
  radial 
  branches 
  converge. 
  Before 
  they 
  meet, 
  each 
  radial 
  

   branch 
  gives 
  off 
  a 
  very 
  short 
  branch 
  ; 
  this 
  connects 
  the 
  radial 
  

   branch 
  with 
  the 
  ring-canal 
  that 
  contained 
  the 
  interradial 
  and 
  intra- 
  

   radial 
  commissures. 
  

  

  