﻿ACIPENSERID2E. 
  4.5 
  

  

  ornament 
  has 
  the 
  appearance 
  of 
  not 
  overlapping 
  the 
  

   superior 
  margin 
  ; 
  and 
  there 
  is 
  a 
  feeble 
  superficial 
  ridge 
  

   extending 
  downwards 
  and 
  backwards 
  from 
  the 
  flexure 
  of 
  

   the 
  bone^ 
  as 
  in 
  the 
  existing 
  species 
  of 
  Acipenser. 
  

  

  Purchased, 
  1873. 
  

  

  The 
  following 
  remains 
  indistinguishable 
  from 
  Acipenser 
  are 
  also 
  

   preserved 
  in 
  the 
  Collection 
  : 
  — 
  

  

  P. 
  5283. 
  Fine 
  lateral 
  scute, 
  noticed 
  and 
  figured 
  in 
  Proc. 
  Geol. 
  Assoc. 
  

   vol. 
  xi. 
  1889, 
  p. 
  28, 
  pi. 
  i. 
  fig. 
  2; 
  Lower 
  Hempstead 
  Beds, 
  

   Hempstead, 
  Isle 
  of 
  Wight. 
  

  

  Presented 
  by 
  the 
  Royal 
  Society, 
  1887. 
  

  

  P. 
  6475. 
  Two 
  portions 
  of 
  scutes 
  and 
  another 
  fragment 
  ; 
  probably 
  

   from 
  the 
  Hempstead 
  Beds. 
  Beckles 
  Coll. 
  

  

  41892. 
  Two 
  portions 
  of 
  pectoral 
  spines 
  : 
  Upper 
  Eocene, 
  Hordwell, 
  

   Hampshire. 
  Purchased, 
  1870. 
  

  

  P. 
  1533, 
  P. 
  1533 
  a. 
  Two 
  imperfect 
  pectoral 
  spines 
  and 
  rolled 
  frag- 
  

   ments 
  of 
  two 
  others, 
  part 
  of 
  the 
  ornament 
  of 
  one 
  figured, 
  

   he. 
  cit. 
  pi. 
  i. 
  fig. 
  3 
  b 
  ; 
  probably 
  from 
  the 
  Hempstead 
  Beds. 
  

  

  Egerton 
  Coll. 
  

  

  P. 
  4946. 
  Pectoral 
  spine 
  wanting 
  distal 
  extremity, 
  resembling 
  the 
  

   York 
  specimen 
  figured, 
  loc. 
  cit. 
  pi. 
  i. 
  figs. 
  3, 
  3 
  a 
  ; 
  Hemp- 
  

   stead 
  Beds. 
  Presented 
  by 
  John 
  Edward 
  Lee, 
  Esq., 
  1885. 
  

  

  The 
  following 
  remains 
  indistinguishable 
  from 
  Acipenser 
  have 
  

   also 
  been 
  described 
  : 
  — 
  

  

  Acipenser 
  ornatus, 
  J. 
  Leidy, 
  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Philad. 
  1873, 
  

   p. 
  15, 
  and 
  Extinct 
  Yert. 
  West. 
  Territ. 
  (Eep. 
  U.S. 
  Geol. 
  

   Surv. 
  Territ.), 
  vol. 
  i. 
  pt. 
  i. 
  1873, 
  p. 
  350, 
  pi. 
  xxxii. 
  fig. 
  58. 
  

   — 
  Miocene; 
  Yirginia. 
  [Scute.] 
  

  

  Acipenser 
  sp., 
  E. 
  T. 
  Newton, 
  Yert. 
  Eorest 
  Bed 
  (Mem. 
  Geol. 
  

   Surv. 
  1882), 
  p. 
  129, 
  pi. 
  xix. 
  fig. 
  6 
  ; 
  and 
  Yert. 
  Pliocene 
  

   Dep. 
  Britain 
  {ibid. 
  1891), 
  p. 
  100.— 
  Eorest 
  Bed 
  Series 
  ; 
  

   Norfolk. 
  [Cephalic 
  plate 
  ; 
  Museum 
  of 
  Practical 
  Geology, 
  

   London.] 
  

  

  Acipenser 
  sp., 
  A. 
  S. 
  Woodward, 
  Proc. 
  Geol. 
  Assoc, 
  vol. 
  xi. 
  (1889), 
  

   p. 
  28 
  ; 
  Premier 
  rayon 
  de 
  la 
  dorsale 
  d'un 
  Poisson, 
  ayant 
  

   quelque 
  rapport 
  avec 
  celui 
  des 
  Balistes, 
  P. 
  Gervais, 
  Zool. 
  

   et 
  Pal. 
  Franc,. 
  (1852), 
  Explic. 
  Planches, 
  Poiss. 
  Eoss. 
  p. 
  5, 
  

   pi. 
  lxviii. 
  fig. 
  33. 
  — 
  Lower 
  Pliocene 
  ; 
  Montpellier, 
  France. 
  

   [Pectoral 
  fin-spine.] 
  

  

  