﻿PACHYCOKMID^. 
  375 
  

  

  Genus 
  SAUROPSIS, 
  Agassiz. 
  

  

  [Neues 
  Jahrb. 
  1832, 
  p. 
  142.J 
  

  

  Syn. 
  Dip>lolepis, 
  B. 
  Vetter, 
  Mittheil. 
  k. 
  mineral.-geol. 
  Mus. 
  Dresden, 
  

   pt. 
  iv. 
  1881, 
  p. 
  91. 
  

  

  Trunk 
  elongate-fusiform, 
  laterally 
  compressed. 
  Head 
  relatively 
  

   large, 
  and 
  snout 
  not 
  produced 
  ; 
  marginal 
  teeth 
  well-spaced. 
  JNo 
  

   ossifications 
  in 
  sheath 
  of 
  notochord. 
  Fin-fulcra 
  absent. 
  Pectoral 
  

   fins 
  large 
  and 
  sickle-shaped, 
  the 
  rays 
  only 
  branching 
  and 
  articulated 
  

   at 
  the 
  extreme 
  end 
  ; 
  pelvic 
  fins 
  small 
  ; 
  dorsal 
  fin 
  in 
  part 
  or 
  com- 
  

   pletely 
  opposed 
  to 
  the 
  anal, 
  which 
  is 
  high 
  and 
  acuminate 
  in 
  front 
  

   and 
  much 
  extended 
  as 
  a 
  low 
  fringe 
  behind 
  ; 
  caudal 
  fin 
  very 
  deeply 
  

   forked. 
  Scales 
  minute, 
  those 
  of 
  the 
  ventral 
  aspect 
  much 
  broader 
  

   than 
  deep 
  ; 
  lateral 
  line 
  conspicuous. 
  

  

  Sauropsis 
  longimanus, 
  Agassiz. 
  

  

  1833-44. 
  Sauropsis 
  longimanus, 
  L. 
  Agassiz, 
  Poiss. 
  Foss. 
  vol. 
  ii. 
  pt. 
  i. 
  

  

  p. 
  11 
  ; 
  pt. 
  ii. 
  p. 
  121, 
  pi. 
  lx. 
  

   1852. 
  Sauropsis 
  longimanus 
  =Pachycormus, 
  F. 
  A. 
  Quenstedt, 
  Handb. 
  

  

  Petrefakt. 
  p. 
  218. 
  

   1860. 
  Sauropsis 
  longi?nana, 
  A. 
  Wagner, 
  Gelehrte 
  Anzeig. 
  k. 
  bay. 
  

  

  Akad. 
  Wiss. 
  vol. 
  1. 
  p. 
  215. 
  

   1863. 
  Sauropsis 
  longimana, 
  A. 
  Wagner, 
  Abh. 
  k. 
  bay. 
  Akad. 
  Wiss., 
  

  

  math.-phys. 
  CI. 
  vol. 
  ix. 
  p. 
  678. 
  

  

  Type. 
  Nearly 
  complete 
  fish 
  ; 
  Palseontological 
  Museum, 
  Munich. 
  

  

  The 
  type 
  species, 
  attaining 
  a 
  length 
  of 
  about 
  0*3. 
  Length 
  of 
  

   head 
  with 
  opercular 
  apparatus 
  equalling 
  about 
  one-quarter 
  of 
  the 
  

   total 
  length 
  to 
  the 
  base 
  of 
  the 
  caudal 
  fin, 
  and 
  exceeding 
  the 
  

   maximum 
  depth 
  of 
  the 
  trunk. 
  Pelvic 
  fins 
  arising 
  midway 
  between 
  

   the 
  pectorals 
  and 
  the 
  anal 
  ; 
  dorsal 
  fin 
  arising 
  slightly 
  in 
  advance 
  of 
  

   the 
  anal, 
  and 
  the 
  anterior 
  rays 
  of 
  these 
  two 
  fins 
  equal 
  in 
  elevation. 
  

  

  Form. 
  4" 
  Log. 
  Lower 
  Kimmeridgian 
  (Lithographic 
  Stone) 
  : 
  Bavaria. 
  

  

  37365. 
  Plaster 
  cast 
  of 
  type 
  specimen 
  ; 
  Solenhofen. 
  

  

  Purchased, 
  1863. 
  

  

  An 
  undetermined 
  species 
  closely 
  related 
  to 
  Saurojjsis 
  longimanus 
  

   indicated 
  by 
  the 
  following 
  specimen 
  : 
  — 
  

  

  P. 
  7568. 
  Imperfect 
  fish 
  about 
  0-4 
  in 
  ]ength, 
  dorso-lateral 
  aspect 
  ; 
  

   Oxford 
  Clay, 
  Christian 
  Malford, 
  Wiltshire. 
  

  

  History 
  unknown. 
  

  

  is 
  

  

  