﻿PACHYCORMID^]. 
  

  

  379 
  

  

  Euthynotus 
  milloti 
  (Sauvage). 
  

   1891. 
  Parathrissops 
  milloti, 
  H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  Sci. 
  Yonne, 
  

   vol. 
  xlv. 
  pt. 
  ii. 
  p. 
  37, 
  pi. 
  i. 
  fig. 
  1, 
  pi. 
  ii. 
  figs. 
  1, 
  3. 
  

  

  Type. 
  Imperfect 
  fish, 
  wanting 
  caudal 
  fin. 
  

  

  The 
  type 
  species 
  of 
  the 
  so-called 
  genus 
  Parathrissops, 
  attaining 
  a 
  

   length 
  of 
  about 
  0*25. 
  Length 
  of 
  head 
  with 
  opercular 
  apparatus 
  

   equalling 
  the 
  maximum 
  depth 
  of 
  the 
  trunk 
  and 
  contained 
  about 
  

   four-and-a-half 
  times 
  in 
  the 
  total 
  length 
  to 
  the 
  base 
  of 
  the 
  caudal 
  

   fin. 
  Distance 
  between 
  the 
  pelvic 
  and 
  anal 
  fins 
  twice 
  as 
  great 
  as 
  

   that 
  between 
  the 
  former 
  and 
  the 
  pectorals 
  ; 
  dorsal 
  fin 
  with 
  15 
  or 
  

   16 
  rays, 
  arising 
  slightly 
  in 
  advance 
  of 
  the 
  anal, 
  which 
  comprises 
  

   34 
  rays. 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Lias 
  : 
  Yonne, 
  France. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  The 
  following 
  imperfect 
  specimens 
  appear 
  to 
  represent 
  a 
  species 
  

   distinguished 
  from 
  the 
  known 
  forms 
  by 
  the 
  more 
  robust 
  proportions 
  

   of 
  the 
  trunk. 
  So 
  far 
  as 
  can 
  be 
  ascertained, 
  the 
  length 
  of 
  the 
  head 
  

   with 
  opercular 
  apparatus 
  is 
  about 
  equal 
  to 
  the 
  maximum 
  depth 
  of 
  

   the 
  trunk 
  and 
  contained 
  four 
  times 
  in 
  the 
  total 
  length 
  to 
  the 
  base 
  

   of 
  the 
  caudal 
  fin. 
  The 
  dorsal 
  and 
  anal 
  fins 
  are 
  arranged 
  as 
  in 
  the 
  

   type 
  species, 
  E. 
  incognitus. 
  

  

  19648-49. 
  A 
  much-fractured 
  distorted 
  fish, 
  in 
  counterpart, 
  with 
  

   upturned 
  head, 
  wanting 
  the 
  caudal 
  fin 
  ; 
  Upper 
  Lias, 
  Boll, 
  

   Wiirtemberg. 
  The 
  operculum 
  exhibits 
  fine 
  tuberculations, 
  

   and 
  there 
  is 
  an 
  apparently 
  false 
  suggestion 
  of 
  a 
  peg-and- 
  

   socket 
  union 
  in 
  the 
  ventral 
  scales 
  of 
  the 
  abdominal 
  region. 
  

  

  Purchased, 
  1845. 
  

  

  P. 
  880. 
  Hinder 
  portion 
  of 
  head 
  and 
  greater 
  portion 
  of 
  trunk, 
  

   displaying 
  the 
  axial 
  skeleton 
  ; 
  Upper 
  Lias, 
  Ohmden, 
  

   Wiirtemberg. 
  Egerton 
  Coll. 
  

  

  19651. 
  A 
  more 
  imperfect 
  specimen 
  ; 
  Boll. 
  Purchased, 
  1845. 
  

  

  To 
  Euthynotus 
  may 
  also 
  be 
  referred 
  a 
  small 
  fish 
  from 
  the 
  Upper 
  

   Lias 
  of 
  Vassy, 
  Yonne, 
  France, 
  described 
  under 
  the 
  name 
  of 
  Caturus 
  

   cotteaui 
  (H. 
  E. 
  Sauvage, 
  Bibl. 
  Ecole 
  Hautes 
  Etudes, 
  vol. 
  xiv. 
  1875, 
  

   no. 
  1, 
  p. 
  15, 
  pi. 
  i. 
  fig. 
  1 
  ; 
  Bull. 
  Soc. 
  Sci. 
  Yonne, 
  [3] 
  vol. 
  vii. 
  

   1883, 
  p. 
  45; 
  and 
  Bull. 
  Soc. 
  Hist. 
  Nat. 
  Autun, 
  vol. 
  iv. 
  1891, 
  

   p. 
  77). 
  

  

  