﻿LEPT0LEPTDJ2. 
  503 
  

  

  1892. 
  Leptolepis 
  affinis, 
  H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  Hist. 
  Nat. 
  Autun, 
  

   vol. 
  v. 
  p. 
  389, 
  pi. 
  xvi. 
  fig. 
  1 
  (reprinted 
  in 
  Bull. 
  Soc. 
  Sci. 
  Yonne, 
  

   vol. 
  xlvii. 
  1893, 
  p. 
  25, 
  pi. 
  i. 
  fig. 
  1). 
  [Nearly 
  complete 
  fish.] 
  

  

  Type. 
  Nearly 
  complete 
  fish. 
  

  

  The 
  type 
  species, 
  of 
  small 
  size, 
  attaining 
  a 
  length 
  of 
  about 
  0*1. 
  

   Head 
  with 
  opercular 
  apparatus 
  occupying 
  somewhat 
  less 
  than 
  one- 
  

   fourth 
  of 
  the 
  total 
  length 
  of 
  the 
  fish 
  ; 
  depth 
  of 
  caudal 
  pedicle 
  ex- 
  

   ceeding 
  one- 
  third 
  the 
  maximum 
  depth 
  of 
  the 
  abdominal 
  region. 
  

   Width 
  of 
  operculum 
  not 
  quite 
  equal 
  to 
  half 
  the 
  length 
  of 
  the 
  head. 
  

   Vertebras 
  about 
  40 
  in 
  number, 
  the 
  centra 
  elongated, 
  forming 
  thin, 
  

   much-constricted 
  cylinders 
  ; 
  the 
  neural 
  and 
  haemal 
  arches 
  in 
  the 
  

   hinder 
  half 
  of 
  the 
  caudal 
  region 
  comparatively 
  robust. 
  Pelvic 
  fins 
  

   arising 
  much 
  nearer 
  to 
  the 
  anal 
  than 
  to 
  the 
  pectorals, 
  and 
  com- 
  

   prising 
  not 
  less 
  than 
  10 
  rays 
  ; 
  dorsal 
  with 
  about 
  12 
  rays, 
  arising 
  

   immediately 
  behind 
  the 
  pelvic 
  pair 
  and 
  almost 
  reaching 
  a 
  point 
  

   opposite 
  the 
  origin 
  of 
  the 
  somewhat 
  smaller 
  anal 
  fin. 
  

  

  Though 
  not 
  strictly 
  in 
  accordance 
  with 
  the 
  rules 
  of 
  nomenclature, 
  

   it 
  seems 
  advisable 
  to 
  adopt 
  the 
  name 
  of 
  bronni 
  for 
  this 
  species 
  in 
  

   honour 
  of 
  its 
  discoverer. 
  The 
  present 
  writer 
  cannot 
  recognize 
  any 
  

   diagnostic 
  characters 
  in 
  the 
  English 
  and 
  French 
  fossils 
  separating 
  

   them 
  from 
  the 
  typical 
  fishes 
  of 
  similar 
  age 
  in 
  Germany 
  ; 
  all 
  of 
  the 
  

   features 
  noted 
  by 
  Sauvage 
  being 
  readily 
  explained 
  by 
  differences 
  in 
  

   the 
  state 
  of 
  crushing 
  and 
  preservation. 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Lias 
  : 
  Baden, 
  Wurtemberg, 
  and 
  Bavaria 
  ; 
  

   Normandy, 
  Burgundy, 
  and 
  Lozere 
  ; 
  Somersetshire. 
  

  

  19641-44. 
  Two 
  imperfect 
  and 
  distorted 
  specimens, 
  in 
  counterpart 
  ; 
  

   Boll, 
  Wurtemberg. 
  Several 
  of 
  the 
  head-bones 
  are 
  well 
  

   shown. 
  Purchased, 
  1845. 
  

  

  22529, 
  -a. 
  One 
  contorted 
  fish 
  and 
  two 
  imperfect 
  specimens, 
  the 
  first 
  

   from 
  Boll, 
  the 
  others 
  probably 
  from 
  Ohmden, 
  Wurtemberg. 
  

  

  Purchased, 
  1848. 
  

  

  36129. 
  Eish 
  about 
  0-09 
  in 
  length, 
  crushed 
  and 
  distorted 
  anteriorly, 
  

   and 
  displaying 
  the 
  broad 
  hsemal 
  spines 
  at 
  the 
  base 
  of 
  the 
  

   caudal 
  fin 
  ; 
  Metzingen, 
  Wurtemberg. 
  Purchased, 
  1861. 
  

  

  P. 
  945, 
  P. 
  950. 
  Eight 
  specimens, 
  variously 
  imperfect, 
  two 
  exhibit- 
  

   ing 
  the 
  general 
  form 
  of 
  the 
  trunk 
  and 
  the 
  position 
  of 
  the 
  

   fins 
  ; 
  Ohmden. 
  Egerton 
  Coll. 
  

  

  P. 
  3663, 
  P. 
  3665. 
  Eish 
  about 
  0-09 
  in 
  length, 
  and 
  a 
  smaller 
  frag- 
  

   mentary 
  specimen 
  ; 
  Ohmden. 
  EnnisJcillen 
  Coll. 
  

  

  P. 
  946. 
  Eish 
  wanting 
  caudal 
  region, 
  labelled 
  Leptolepis 
  jaegeri 
  by 
  

   Count 
  Minister 
  ; 
  Ohmden. 
  Egerton 
  Coll. 
  

  

  