﻿130 
  

  

  Mr. 
  C. 
  T. 
  Regan 
  on 
  the 
  Anatomy 
  and 
  

  

  Family 
  1. 
  Scopelarchidae. 
  

  

  Snout 
  short. 
  Maxillary 
  with 
  a 
  small 
  anterior 
  expansion 
  ; 
  

   a 
  supiamaxillary 
  ; 
  canines 
  slender, 
  barbed, 
  forming 
  a 
  regular 
  

   series 
  in 
  the 
  lower 
  jaw. 
  Skull 
  considerably 
  expanded 
  behind 
  

   the 
  narrow 
  interorbital 
  region 
  ; 
  parietals 
  meeting 
  above 
  supra- 
  

   occipital; 
  posterior 
  temporal 
  fossae 
  not 
  roofed 
  ; 
  lateral 
  ethmoids 
  

   separated 
  by 
  an 
  interspace 
  ; 
  suborbitals 
  ossified. 
  A 
  single 
  

   laminar 
  postcleithrum 
  ; 
  cleithrum 
  expanded 
  below. 
  52 
  ver- 
  

   tebrae; 
  ribs 
  on 
  short 
  processes. 
  Dorsal 
  fin 
  short. 
  

  

  Ffc. 
  5. 
  

  

  A. 
  B. 
  

  

  A. 
  Pectoral 
  arch 
  of 
  Evermanella 
  hyalina 
  ; 
  from 
  within. 
  

  

  B. 
  Pectoral 
  arch 
  of 
  Omosudis 
  loioii; 
  external 
  view, 
  with 
  the 
  coracoids 
  

  

  and 
  radials 
  not 
  exposed. 
  

  

  ptte, 
  post-temporal 
  ; 
  cl, 
  cleithrum 
  ; 
  sel, 
  supracleithrum 
  ; 
  pel, 
  pel', 
  post- 
  

   cleithra 
  ; 
  sc, 
  hypercoracoid 
  ; 
  cor, 
  hypocoracoid 
  ; 
  r, 
  radials 
  ; 
  p, 
  fin- 
  

   rays. 
  

  

  Scopelarchus, 
  Alcock, 
  seems 
  to 
  be 
  more 
  primitive 
  than 
  the 
  

   other 
  genera. 
  As 
  described 
  and 
  figured 
  it 
  has 
  the 
  head, 
  

   mouth, 
  teeth, 
  &c. 
  of 
  Evtrmanella, 
  but 
  the 
  dorsal 
  fin 
  is 
  more 
  

   advanced, 
  there 
  are 
  traces 
  of 
  small 
  scales 
  in 
  addition 
  to 
  the 
  

   large 
  scales 
  of 
  the 
  lateral 
  line, 
  and 
  the 
  eyes, 
  described 
  

   as 
  having 
  the 
  visual 
  axis 
  superior 
  rather 
  than 
  lateral, 
  are 
  

   probably 
  not 
  formed 
  as 
  in 
  Evermanella. 
  Neosudis, 
  Casteln., 
  

   may 
  pertain 
  to 
  this 
  family. 
  In 
  Evermanella, 
  Fowler 
  (Odonto- 
  

   stomus), 
  and 
  JJissoma, 
  Brauer, 
  the 
  eyes 
  can 
  look 
  upwards 
  

   or 
  outwards, 
  being 
  lodged 
  in 
  a 
  vertical 
  pocket 
  which 
  is 
  

   covered 
  externally 
  by 
  a 
  transparent 
  membrane. 
  The 
  skeletal 
  

   characters 
  given 
  are 
  those 
  of 
  an 
  example 
  of 
  Evermanella 
  

   hyalina. 
  

  

  