﻿ASPIDOEHYNCHID^:. 
  425 
  

  

  37319. 
  Rostrum 
  in 
  side 
  view, 
  well 
  displaying 
  the 
  premaxillary 
  

   dentition. 
  Purchased, 
  1863. 
  

  

  21430-a. 
  Two 
  small 
  rostra. 
  Purchased, 
  1847. 
  

  

  46350. 
  Two 
  ectopterygoid 
  bones. 
  Cunnington 
  Coll. 
  

  

  21430 
  b. 
  Another 
  ectopterygoid. 
  Purchased, 
  1847. 
  

  

  29045. 
  Large 
  maxilla 
  and 
  two 
  fragments. 
  Purchased, 
  1854. 
  

  

  29045 
  a. 
  Maxilla, 
  shown 
  of 
  the 
  natural 
  size 
  in 
  PI. 
  XVII. 
  fig. 
  8. 
  

  

  Purchased, 
  1854. 
  

  

  46349. 
  Small 
  maxilla. 
  Cunnington 
  Coll. 
  

  

  40519, 
  41296, 
  42295, 
  46412. 
  Six 
  detached 
  dentary 
  boues, 
  the 
  

   largest 
  shown 
  of 
  the 
  natural 
  size 
  in 
  PI. 
  XVII. 
  fig. 
  9. 
  

  

  Purchased, 
  1867, 
  1869, 
  1870, 
  1875. 
  

  

  P. 
  967 
  d. 
  Eight 
  dentary 
  bone. 
  Egerton 
  Coll. 
  

  

  21430c, 
  24676, 
  29047. 
  Pour 
  splenial 
  bones, 
  one 
  shown- 
  of 
  the 
  

   natural 
  size 
  in 
  PL 
  XVII. 
  fig. 
  10. 
  

  

  Purchased, 
  1847, 
  1850, 
  1854. 
  

  

  Aspidorhynchus 
  sphekodes, 
  Sauvage. 
  

  

  1893. 
  Aspidorhynchus 
  sphekodes, 
  H. 
  E. 
  Sauvage, 
  Bull. 
  Soc. 
  Hist. 
  Nat. 
  

   Autun, 
  vol. 
  vi. 
  p. 
  431, 
  pi. 
  viii. 
  fig. 
  1. 
  

  

  Type. 
  Fish 
  wanting 
  paired 
  fins. 
  

  

  A 
  much-elongated 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*3. 
  Head 
  

   with 
  opercular 
  apparatus 
  occupying 
  about 
  one-quarter 
  of 
  the 
  total 
  

   length 
  ; 
  maximum 
  depth 
  of 
  trunk 
  contained 
  considerably 
  more 
  than 
  

   ten 
  times 
  in 
  the 
  total 
  length. 
  Rostrum 
  slender, 
  projecting 
  in 
  

   advance 
  of 
  the 
  mandible 
  for 
  a 
  length 
  equalling 
  about 
  one-third 
  

   that 
  of 
  the 
  cranium 
  ; 
  cranial 
  roof-bones 
  rugose 
  and 
  in 
  part 
  tuber- 
  

   culated. 
  Scales 
  smooth. 
  

  

  Form. 
  Sf 
  Loc. 
  Lower 
  Kimmeridgian 
  : 
  Orbagnoux, 
  Ain, 
  France. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Aspidorhynchus 
  fisheri, 
  Egerton. 
  

  

  1854-55. 
  Aspidorhynchus 
  fisheri, 
  Sir 
  P. 
  Egerton, 
  Ann. 
  Mag. 
  Nat. 
  Hist. 
  

  

  [2] 
  vol. 
  xiii. 
  p. 
  434 
  ; 
  and 
  Figs. 
  & 
  Descript. 
  Brit. 
  Organic 
  Remains, 
  

  

  dec. 
  viii. 
  (Mem. 
  Geol. 
  Surv.), 
  no. 
  6, 
  pi. 
  vi. 
  

   1880. 
  Aspidorhynchus 
  fisheri, 
  A. 
  Gunther, 
  Study 
  of 
  Fishes, 
  p. 
  369, 
  

  

  fig. 
  146. 
  

  

  Type* 
  Nearly 
  complete 
  fish 
  ; 
  Dorchester 
  Museum. 
  

  

  A 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*35-0*4. 
  Head 
  with 
  

  

  