﻿356 
  PROCEEDINGS 
  OF 
  THE 
  GEOLOGICAL 
  SOCIETY. 
  [Apr. 
  27, 
  

  

  PALiEONiscrs 
  altus, 
  Kirkby. 
  PI. 
  XVIII. 
  fig. 
  1. 
  

  

  P. 
  latus, 
  Kirkby, 
  Annals 
  of 
  Nat. 
  Hist. 
  3 
  ser. 
  vol. 
  ix. 
  p. 
  268*. 
  

  

  Greatest 
  length 
  2|| 
  inches 
  ; 
  length 
  of 
  body 
  2 
  inches 
  ; 
  maximum 
  

   breadth 
  rather 
  more 
  than 
  1 
  inch, 
  or 
  more 
  than 
  one-half 
  of 
  the 
  

   length 
  of 
  the 
  body 
  ; 
  breadth 
  of 
  tail 
  | 
  inch 
  ; 
  head 
  g 
  inch 
  long, 
  and 
  

   the 
  same 
  in 
  width. 
  

  

  The 
  general 
  form 
  of 
  this 
  fish 
  is 
  gibbons 
  ; 
  the 
  tail 
  is 
  only 
  slightly 
  

   heterocercal. 
  The 
  pectoral 
  fins 
  are 
  small 
  and 
  slender 
  ; 
  the 
  ventrals, 
  

   which 
  are 
  also 
  small, 
  are 
  placed 
  1-jL- 
  inch 
  from 
  the 
  snout, 
  and 
  the 
  

   anal 
  is 
  1-^ 
  from 
  the 
  same 
  point 
  ; 
  the 
  dorsal, 
  which 
  is 
  the 
  most 
  ro- 
  

   bust 
  of 
  the 
  fins 
  mentioned, 
  is 
  situated 
  at 
  a 
  point 
  between 
  the 
  anal 
  and 
  

   the 
  ventrals. 
  The 
  caudal 
  is 
  wide, 
  and 
  has 
  about 
  24 
  strong 
  rays 
  : 
  both 
  

   lobes 
  of 
  this 
  fin, 
  as 
  well 
  as 
  the 
  anterior 
  borders 
  of 
  the 
  dorsal 
  and 
  

   anal, 
  are 
  protected 
  by 
  fulcral 
  scales 
  as 
  in 
  both 
  the 
  preceding, 
  species 
  ; 
  

   and 
  in 
  advance 
  of 
  the 
  fulcrals 
  are 
  the 
  large 
  " 
  ecaillcs 
  impaires," 
  which 
  

   so 
  generally 
  accompany 
  them. 
  

  

  The 
  scales 
  of 
  the 
  flanks 
  are 
  of 
  the 
  same 
  type 
  as 
  those 
  of 
  P. 
  varians, 
  

   but 
  are 
  comparatively 
  wider 
  and 
  shorter. 
  They 
  are 
  robust, 
  and 
  

   smooth 
  except 
  in 
  having 
  marginal 
  lines 
  of 
  growth, 
  and 
  are 
  arranged 
  

   in 
  steeply 
  sloping 
  dorso-ventral 
  series. 
  

  

  The 
  bones 
  of 
  the 
  head 
  are 
  ornamented 
  with 
  the 
  same 
  kind 
  of 
  

   rugulose 
  sculpturing 
  as 
  that 
  which 
  characterizes 
  P. 
  varians. 
  The 
  

   orbit 
  is 
  also 
  large. 
  

  

  I 
  do 
  not 
  know 
  of 
  any 
  species 
  of 
  Pal&oniscus 
  that 
  approaches 
  

   P. 
  alius 
  in 
  its 
  great 
  relative 
  width 
  of 
  body, 
  although 
  in 
  general 
  

   form 
  of 
  scales, 
  in 
  fin-structure, 
  and 
  in 
  ornamentation 
  of 
  the 
  bones 
  

   of 
  the 
  head 
  it 
  differs 
  little 
  from 
  the 
  two 
  preceding 
  species. 
  

  

  One 
  or 
  two 
  examples 
  of 
  this 
  species 
  have 
  been 
  found 
  in 
  the 
  Fish- 
  

   bed 
  of 
  the 
  Old 
  Quarry, 
  Fulwell. 
  

  

  Pal^oniscus 
  Augustus 
  ?, 
  Agassiz. 
  

  

  Along 
  with 
  the 
  Palceonisci 
  previously 
  described 
  has 
  occurred 
  a 
  

   specimen 
  of 
  what 
  appears 
  to 
  be 
  another 
  species. 
  It 
  is 
  chiefly 
  dis- 
  

   tinguished 
  by 
  its 
  large 
  fins 
  and 
  produced 
  snout, 
  and 
  in 
  general 
  

   appearance 
  has 
  much 
  resemblance 
  to 
  P. 
  angustus, 
  Ag., 
  to 
  which 
  I 
  

   provisionally 
  refer 
  it. 
  

  

  The 
  specimen 
  is 
  in 
  the 
  possession 
  of 
  Mr. 
  W. 
  M. 
  "Wake, 
  and 
  was 
  

   found 
  in 
  the 
  Old 
  Quarry, 
  Fulwell. 
  

  

  PLANTS. 
  

  

  Ulmaxxia 
  selagixoides, 
  King. 
  

  

  Several 
  specimens 
  have 
  occurred, 
  usually 
  more 
  or 
  less 
  fragmentary, 
  

   of 
  a 
  vegetable 
  that 
  evidently 
  belongs 
  to 
  the 
  above 
  species. 
  The 
  

   specimens 
  are 
  generally 
  impressions, 
  with 
  traces 
  of 
  carbonaceous 
  

   matter, 
  the 
  nervation 
  of 
  the 
  leaves 
  being 
  occasionally 
  shown 
  on 
  the 
  

   impressed 
  surface. 
  The 
  finest 
  example, 
  in 
  the 
  cabinet 
  of 
  Mr. 
  Wake, 
  

   is 
  eleven 
  inches 
  long, 
  with 
  a 
  branch 
  of 
  three 
  and 
  a 
  half 
  inches. 
  

  

  * 
  At 
  the 
  suggestion 
  of 
  Sir 
  Philip 
  Egerton, 
  I 
  adopt 
  the 
  term 
  altus 
  for 
  this 
  

   species, 
  latus 
  having 
  been 
  already 
  applied 
  to 
  another 
  species 
  of 
  Paloeoniscus. 
  

  

  