﻿PACHYCORMID.E. 
  389 
  

  

  cranium 
  has 
  not 
  hitherto 
  been 
  observed. 
  One 
  of 
  the 
  finest 
  known 
  

   specimens, 
  in 
  the 
  Moore 
  Collection, 
  Bath 
  Museum, 
  was 
  obtained 
  

   from 
  the 
  Upper 
  Lias 
  of 
  Ilminster, 
  Somersetshire. 
  

  

  Form. 
  Sf 
  hoc. 
  Upper 
  Lias 
  : 
  Baden 
  and 
  Wiirtemberg 
  ; 
  Yonne, 
  

   France 
  ; 
  Yorkshire 
  and 
  Somersetshire. 
  

  

  P. 
  7572. 
  Imperfect 
  fish, 
  lateral 
  aspect 
  and 
  partly 
  in 
  counterpart, 
  

   about 
  0*76 
  in 
  length, 
  and 
  wanting 
  the 
  greater 
  part 
  of 
  the 
  

   caudal 
  fin; 
  Ohmden, 
  Wiirteinberg. 
  The 
  characteristic 
  

   operculum 
  of 
  the 
  right 
  side 
  is 
  shown 
  in 
  position, 
  while 
  

   that 
  of 
  the 
  left 
  side 
  is 
  displaced 
  to 
  the 
  ventral 
  border 
  of 
  

   the 
  abdominal 
  region. 
  The 
  dorsal 
  and 
  anal 
  fins 
  are 
  

   displayed 
  in 
  their 
  natural 
  position, 
  and 
  the 
  tolerably 
  

   well-preserved 
  squamation 
  is 
  remarkable 
  for 
  the 
  number 
  

   of 
  series 
  in 
  which 
  the 
  exposed 
  portion 
  of 
  the 
  scale 
  is 
  much 
  

   broader 
  than 
  deep. 
  Eyerton 
  Coll. 
  

  

  P. 
  3731. 
  Imperfect 
  head 
  and 
  abdominal 
  region 
  of 
  a 
  larger 
  speci- 
  

   men, 
  ventral 
  aspect, 
  noticed 
  by 
  Agassiz, 
  loc. 
  cit., 
  under 
  the 
  

   name 
  of 
  EugnatJius 
  giganteus 
  or 
  PacJiycormus 
  giganteus 
  : 
  

   Boll, 
  Wiirtemberg. 
  EnnisJcillen 
  Coll. 
  

  

  P. 
  2040. 
  Imperfect 
  head 
  and 
  pectoral 
  fins 
  ; 
  Wiirtemberg. 
  

  

  Egerton 
  Coll. 
  

  

  P. 
  2042. 
  Head 
  and 
  displaced 
  pectoral 
  fin 
  ; 
  Ohmden. 
  Egerton 
  Coll. 
  

  

  P. 
  3709. 
  Imperfect 
  small 
  head 
  and 
  pectoral 
  fins, 
  with 
  remains 
  of 
  

   abdominal 
  region, 
  labelled 
  Pachycormus 
  latirostris 
  by 
  

   Agassiz 
  ; 
  Whitby, 
  Yorkshire. 
  EnnisJcillen 
  Coll. 
  

  

  P. 
  3708. 
  Crushed 
  and 
  imperfect 
  head, 
  labelled 
  Pacliycormus 
  lati- 
  

   rostris 
  by 
  Agassiz 
  ; 
  Whitby. 
  The 
  solid 
  rostrum 
  is 
  shown 
  

   with 
  its 
  marginal 
  teeth 
  ; 
  and 
  the 
  left 
  operculum 
  is 
  well 
  

   displayed. 
  EnnisJcillen 
  Coll. 
  

  

  P. 
  2039, 
  P. 
  4280. 
  Fragmentary 
  remains 
  of 
  large 
  head 
  and 
  pectoral 
  

   fin, 
  in 
  counterpart 
  ; 
  Whitby. 
  Egerton 
  Sf 
  EnnisJcillen 
  Colls. 
  

  

  P. 
  3709 
  a. 
  Pectoral 
  fin 
  ; 
  Whitby. 
  FmnisUllen 
  Coll. 
  

  

  P. 
  5954. 
  Imperfect 
  mandible 
  ; 
  Ohmenhausen. 
  PurcJiased, 
  1889. 
  

  

  P. 
  3719 
  b. 
  Small 
  trunk 
  apparently 
  of 
  this 
  species, 
  displaying 
  the 
  

   dorsal 
  and 
  anal 
  fins 
  ; 
  Ohmden, 
  Wiirtemberg. 
  The 
  spiral 
  

   intestine 
  is 
  beautifully 
  exhibited 
  by 
  its 
  coprolitic 
  contents, 
  

  

  EnnisJcillen 
  Coll. 
  

  

  