﻿SEHIONOTID^. 
  135' 
  

  

  173 
  (Mantell 
  Cat.). 
  Bemains 
  of 
  a 
  fish 
  0*37 
  in 
  length, 
  showing 
  only 
  

   fragments 
  of 
  the 
  fins. 
  Mantell 
  Coll. 
  

  

  P. 
  1575. 
  Imperfectly 
  preserved 
  fish 
  about 
  # 
  375 
  in 
  length, 
  with 
  

   portions 
  of 
  all 
  the 
  fins. 
  Egerton 
  Coll. 
  

  

  18988. 
  Head 
  and 
  much 
  fractured 
  trunk 
  of 
  a 
  fish 
  about 
  0*36 
  in 
  

   length. 
  The 
  tuberculations 
  are 
  fused 
  into 
  rugae. 
  

  

  Purchased, 
  1845. 
  

  

  P. 
  3567. 
  Type 
  specimen 
  of 
  the 
  so-called 
  Tetragonol&pis 
  speciosus,. 
  

   described 
  and 
  figured 
  by 
  Agassiz. 
  EnnisJcillen 
  Coll. 
  

  

  48012. 
  Somewhat 
  smaller 
  but 
  better 
  preserved 
  specimen, 
  showing 
  

   broad 
  bicuspid 
  teeth 
  in 
  both 
  jaws, 
  and 
  with 
  the 
  tubercular 
  

   ornament 
  of 
  the 
  head, 
  opercular 
  bones, 
  and 
  dorsal 
  ridge- 
  

   scales 
  rarely 
  passing 
  into 
  rugae. 
  The 
  characters 
  of 
  the 
  

   squamation 
  are 
  well 
  exhibited. 
  Purchased, 
  1877. 
  

  

  P. 
  3554 
  a. 
  Imperfect 
  trunk 
  and 
  hinder 
  portion 
  of 
  head 
  of 
  a 
  fish 
  

   about 
  0-30 
  in 
  length. 
  EnnisJcillen 
  Coll.- 
  

  

  P. 
  4399. 
  Imperfect 
  crushed 
  and 
  abraded 
  specimen 
  about 
  0*32 
  in 
  

   length, 
  exhibiting 
  a 
  remarkable 
  smoothness 
  of 
  part 
  of 
  the 
  

   opercular 
  bones. 
  EnnisJcillen 
  Coll. 
  

  

  P. 
  3550. 
  Pish 
  0*32 
  in 
  length, 
  with 
  imperfect 
  fins 
  and 
  abraded 
  

   squamation, 
  showing 
  both 
  bicuspid 
  and 
  unicuspid 
  teeth. 
  

   The 
  fin-fulcra 
  are 
  well 
  exhibited. 
  EnnisJcillen 
  ColL 
  

  

  35790. 
  Specimen 
  of 
  the 
  same 
  size 
  with 
  caudal 
  fin 
  and 
  well-preserved 
  

   squamation. 
  The 
  head 
  is 
  much 
  crushed, 
  and 
  there 
  is 
  

   scarcely 
  any 
  tendency 
  towards 
  a 
  fusion 
  of 
  the 
  superficial 
  

   tuberculations. 
  Purchased, 
  1860, 
  

  

  39846. 
  Specimen 
  slightly 
  smaller 
  than 
  the 
  last, 
  wanting 
  the 
  greater 
  

   part 
  of 
  the 
  median 
  fins. 
  The 
  superficial 
  tuberculations 
  

   are 
  rarely 
  fused 
  into 
  short 
  rugae. 
  Purchased, 
  1866. 
  

  

  P. 
  4230, 
  P. 
  4398. 
  Two 
  similar 
  but 
  more 
  imperfectly 
  preserved 
  

   specimens. 
  Enniskillen 
  ColL 
  

  

  P. 
  3539. 
  Imperfect 
  head 
  of 
  an 
  equally 
  large 
  fish, 
  showing 
  jaws 
  and 
  

   dentition. 
  EnnisJcillen 
  Coll. 
  

  

  P. 
  3538. 
  Another 
  head, 
  with 
  extremely 
  coarsely 
  marked 
  opercular 
  

   apparatus. 
  The 
  ethmoidal 
  plate 
  and 
  premaxillae 
  are 
  figured 
  

   in 
  Proc. 
  Zool. 
  Soc. 
  1893, 
  pi. 
  1. 
  fig. 
  4. 
  EnnisJcillen 
  Coll. 
  

  

  