﻿ASPIDORHYtfCHID^. 
  435 
  

  

  A 
  slender 
  species 
  attaining 
  a 
  length 
  of 
  at 
  least 
  0*3. 
  Head 
  with 
  

   opercular 
  apparatus 
  contained 
  about 
  three 
  -and-a-half 
  times, 
  and 
  

   maximum 
  depth 
  of 
  trunk 
  fifteen 
  times 
  in 
  the 
  total 
  length 
  ; 
  jaws 
  

   nearly 
  equal 
  in 
  length. 
  Anterior 
  scales 
  of 
  lateral 
  line 
  about 
  twice 
  

   as 
  deep 
  as 
  broad. 
  

  

  Form. 
  Sf 
  Loc. 
  Cretaceous 
  : 
  Island 
  of 
  Lesina, 
  Dalmatia 
  ; 
  (?) 
  also 
  

   Comen, 
  Istria. 
  

  

  Not 
  represented 
  in 
  the 
  Collection. 
  

  

  Belonostomus 
  comptoni 
  (Agassiz). 
  

  

  1841. 
  Aspidorhynchus 
  comptoni, 
  L. 
  Agassiz, 
  Edinb. 
  New 
  Phil. 
  Journ. 
  

  

  vol. 
  xxx. 
  p. 
  83. 
  

   1844. 
  Aspidorhynchus 
  comptoni, 
  L. 
  Agassiz, 
  Comptes 
  Rendus, 
  vol. 
  xviii, 
  

  

  p. 
  1009. 
  

   1890. 
  Belonostomus 
  comptoni, 
  A. 
  S. 
  Woodward, 
  Proc. 
  Zool. 
  Soc. 
  p. 
  629, 
  

  

  pis. 
  liv., 
  lv. 
  figs. 
  1-10. 
  

  

  Type. 
  Distorted 
  fish, 
  imperfect 
  anteriorly 
  and 
  posteriorly 
  ; 
  

   British 
  Museum. 
  

  

  A 
  large 
  species 
  attaining 
  a 
  length 
  of 
  about 
  0*8. 
  Head 
  with 
  

   opercular 
  apparatus 
  occupying 
  somewhat 
  less 
  than 
  one-third 
  of 
  

   the 
  total 
  length 
  ; 
  maximum 
  depth 
  of 
  trunk 
  contained 
  about 
  ten 
  

   times 
  in 
  the 
  total 
  length. 
  Snout 
  rapidly 
  tapering 
  to 
  a 
  very 
  slender 
  

   rostrum; 
  external 
  ornament 
  of 
  head 
  and 
  opercular 
  apparatus 
  

   consisting 
  of 
  thick, 
  closely-arranged, 
  rounded 
  rugse 
  of 
  ganoine 
  ; 
  

   [jaws 
  unknown]. 
  Vertebrae 
  well-ossified, 
  smooth 
  and 
  constricted, 
  

   about 
  as 
  long 
  as 
  deep, 
  and 
  pierced 
  by 
  a 
  small 
  thread 
  of 
  persistent 
  

   notochord. 
  Scales 
  ornamented 
  with 
  a 
  conspicuous, 
  fine 
  rugosity, 
  

   and 
  a 
  vertical 
  ridge 
  on 
  each 
  of 
  the 
  scales 
  in 
  the 
  two 
  deepened 
  series 
  

   of 
  the 
  flank 
  ; 
  the 
  scales 
  of 
  the 
  lateral 
  line 
  truncated 
  inferiorly 
  and 
  

   much 
  exceeding 
  in 
  depth 
  the 
  series 
  below, 
  those 
  on 
  the 
  anterior 
  

   portion 
  of 
  the 
  abdominal 
  region 
  being 
  at 
  least 
  five 
  times 
  as 
  deep 
  

   as 
  broad. 
  

  

  Form. 
  Sf 
  Loc. 
  Upper 
  Cretaceous 
  : 
  Province 
  of 
  Ceara, 
  Brazil. 
  

  

  47892. 
  Hinder 
  portion 
  of 
  head 
  and 
  greater 
  portion 
  of 
  trunk 
  

   described 
  and 
  figured 
  in 
  Proc. 
  Zool. 
  Soc. 
  1890, 
  p. 
  629, 
  

   pi. 
  liv. 
  ; 
  Barra 
  do 
  Jardim, 
  Serra 
  de 
  Araripe, 
  North 
  Brazil. 
  

   This 
  may 
  be 
  regarded 
  as 
  the 
  type 
  specimen, 
  the 
  few 
  

   fragments 
  noticed 
  by 
  Agassiz 
  being 
  too 
  imperfectly 
  

   described 
  and 
  now 
  lost. 
  

  

  Presented 
  by 
  the 
  Hon. 
  Robert 
  Marsham, 
  1877. 
  

  

  15495 
  e, 
  a. 
  Two 
  specimens 
  showing 
  the 
  upper 
  aspect 
  of 
  the 
  

   cranium 
  and 
  remains 
  of 
  the 
  anterior 
  portion 
  of 
  the 
  trunk 
  ; 
  

  

  2f2 
  

  

  