﻿PHOLIDOPHOKID^E. 
  453 
  

  

  Pholidophorus 
  pachysomus, 
  Egerton. 
  

   [Plate 
  XII. 
  fig. 
  3.] 
  

  

  1852. 
  Pholidophorus 
  pachysomus, 
  Sir 
  P. 
  Egerton, 
  Pigs. 
  & 
  Descript. 
  

   Brit. 
  Organic 
  Kemains, 
  dec. 
  vi. 
  (Mem. 
  Geol. 
  Surv.), 
  no. 
  4, 
  pi. 
  iv. 
  

  

  Type. 
  Imperfect 
  distorted 
  fish 
  ; 
  British 
  Museum. 
  

  

  A 
  species 
  (? 
  or 
  variety) 
  differing 
  only 
  from 
  P. 
  bechei 
  in 
  its 
  stouter 
  

   proportions 
  and 
  the 
  relatively 
  larger 
  size 
  of 
  the 
  scales. 
  Maximum 
  

   depth 
  of 
  trunk 
  contained 
  not 
  more 
  than 
  three-and-a-half 
  times 
  in 
  

   the 
  total 
  length 
  of 
  the 
  fish. 
  

  

  Egerton's 
  statement 
  that 
  the 
  scales 
  of 
  the 
  lateral 
  line 
  number 
  

   only 
  30 
  is 
  founded 
  upon 
  the 
  type 
  specimen, 
  which 
  is 
  proved 
  by 
  

   later 
  specimens 
  to 
  be 
  imperfect. 
  As 
  in 
  P. 
  bechei, 
  the 
  number 
  of 
  

   transverse 
  series 
  of 
  scales 
  in 
  P. 
  pachysomus 
  is 
  approximately 
  40. 
  

  

  Form. 
  &f 
  Loc. 
  Lower 
  Lias 
  : 
  Dorsetshire. 
  

  

  The 
  following 
  specimens 
  were 
  all 
  obtained 
  from 
  the 
  neighbour- 
  

   hood 
  of 
  Lyme 
  Kegis 
  : 
  — 
  

  

  P. 
  571. 
  Type 
  specimen, 
  much 
  fractured, 
  crushed 
  and 
  distorted. 
  

  

  Egerton 
  Coll. 
  

  

  28281. 
  Pish 
  about 
  0-17 
  in 
  length 
  and 
  0*045 
  in 
  maximum 
  depth, 
  

   with 
  imperfect 
  head, 
  shown 
  in 
  PL 
  XII. 
  fig. 
  3. 
  

  

  Purchased, 
  1853. 
  

  

  35557. 
  Smaller 
  and 
  more 
  imperfect 
  fish, 
  exhibiting 
  minute 
  fulcra 
  

   on 
  the 
  right 
  pelvic 
  fin. 
  Purchased, 
  1858. 
  

  

  39855. 
  Pine 
  specimen 
  0*165 
  in 
  length, 
  with 
  remarkably 
  narrow 
  

   caudal 
  pedicle. 
  Purchased, 
  1866. 
  

  

  P. 
  1049 
  a, 
  b, 
  P. 
  1052. 
  Three 
  imperfect 
  crushed 
  and 
  fractured 
  spe- 
  

   cimens. 
  Egerton 
  Coll. 
  

  

  36475. 
  Distorted 
  fish. 
  Purchased, 
  1862. 
  

  

  P. 
  1049 
  C, 
  d. 
  Two 
  specimens 
  showing 
  remains 
  of 
  the 
  head 
  and 
  

   abdominal 
  region. 
  Egerton 
  Coll. 
  

  

  38740. 
  Small 
  imperfect 
  fish 
  0*1 
  in 
  length, 
  probably 
  referable 
  to 
  this 
  

   species. 
  Purchased, 
  1865. 
  

  

  A 
  fish 
  not 
  yet 
  clearly 
  distinguished 
  from 
  P. 
  pachysomus 
  also 
  

   occurs 
  in 
  the 
  Upper 
  Lias 
  of 
  Wurtemberg, 
  and 
  has 
  already 
  been 
  

   noticed 
  by 
  Quenstedt 
  (Handb. 
  Petrefakt. 
  1852, 
  p. 
  207, 
  pi. 
  xvii. 
  

   fig. 
  15, 
  and 
  Der 
  Jura, 
  1858, 
  p. 
  234). 
  The 
  following 
  are 
  examples 
  

   of 
  this 
  form 
  : 
  — 
  

  

  