﻿828 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [40] 
  

  

  485. 
  Myctophuni 
  mulleri 
  1 
  Gmelin. 
  G. 
  (467) 
  

  

  486. 
  Myctophum 
  boops 
  2 
  Richardson. 
  A. 
  

  

  125.— 
  MAUROLICUS 
  3 
  Cocco. 
  (132) 
  

  

  487. 
  Maurolicus 
  borealis 
  Nilsson. 
  B. 
  (468) 
  

  

  Head 
  depressed, 
  with 
  the 
  snout 
  produced, 
  flat 
  above. 
  Cleft 
  of 
  the 
  mouth 
  very 
  wide, 
  

   with 
  the 
  lower 
  jaws 
  projecting 
  ; 
  premaxillary 
  very 
  long, 
  styliform, 
  tapering, 
  not 
  mov- 
  

   able 
  ; 
  maxillary 
  obsolete. 
  Teeth 
  in 
  the 
  jaws 
  in 
  broad 
  bauds, 
  not 
  covered 
  by 
  lips, 
  curved, 
  

   unequal 
  in 
  size, 
  and 
  barbed 
  at 
  the 
  end; 
  a 
  series 
  of 
  similar 
  teeth 
  along 
  the 
  whole 
  length 
  

   of 
  each 
  side 
  of 
  the 
  palate; 
  a 
  few 
  teeth 
  on 
  the 
  tongue, 
  and 
  groups 
  of 
  small 
  teeth 
  on 
  

   thehyoid; 
  eye 
  moderate, 
  lateral. 
  Pectoral 
  moderate; 
  ventrals 
  8-rayed, 
  inserted 
  closo 
  

   behind 
  pectoral. 
  Dorsal 
  fin 
  median, 
  of 
  about 
  18 
  rays 
  ; 
  adipose 
  fin 
  present 
  or 
  absent 
  ; 
  

   anal 
  moderate 
  ; 
  caudal 
  cmarginate. 
  Gill 
  openings 
  very 
  wide, 
  the 
  gill 
  membranes 
  

   separate, 
  free 
  from 
  the 
  isthmus. 
  Brauchiostegals 
  11 
  or 
  12. 
  Gill 
  laminae 
  well 
  developed 
  ; 
  

   gill-rakers 
  tubercular 
  ; 
  pseudobranchiaj 
  well 
  developed. 
  Scales 
  rather 
  small. 
  Deep- 
  

   sea 
  fishes. 
  (BaBvS, 
  deep 
  ; 
  davpoi, 
  sauru,8 
  = 
  Synodus.) 
  

  

  Bathysaurus 
  agassizii 
  Goodo 
  & 
  Bean. 
  

  

  Body 
  elongate, 
  subterete. 
  Head 
  alligator-like, 
  naked, 
  except 
  on 
  cheek 
  and 
  occiput, 
  

   with 
  strong 
  nasal 
  and 
  interorbital 
  ridges 
  ; 
  its 
  greatest 
  width 
  more 
  than 
  half 
  its 
  length; 
  

   gape 
  of 
  mouth 
  very 
  wide, 
  one-sixth 
  length 
  of 
  body, 
  extending 
  behind 
  eye 
  for 
  a 
  dis- 
  

   tance 
  equal 
  to 
  interorbital 
  width. 
  Premaxillary 
  with 
  two 
  irregular 
  rows 
  of 
  deprcssiblo 
  

   teeth, 
  some 
  of 
  them 
  barbed, 
  those 
  of 
  inner 
  row 
  much 
  the 
  largest; 
  lower 
  jaw 
  enor- 
  

   mously 
  strong, 
  its 
  sides 
  projecting 
  beyond 
  the 
  upper 
  jaw 
  ; 
  its 
  dentary 
  edge 
  thickly 
  

   studded 
  with 
  depressible 
  teeth, 
  many 
  of 
  them, 
  especially 
  the 
  larger 
  inner 
  ones, 
  

   strongly 
  barbed; 
  those 
  in 
  front, 
  claw-like, 
  recurved 
  ; 
  three 
  rows 
  of 
  teeth 
  on 
  the 
  

   palatines, 
  the 
  middle 
  ones 
  very 
  much 
  enlarged 
  and 
  most 
  of 
  them 
  strongly 
  barbed, 
  

   these 
  being 
  the 
  largest 
  of 
  all 
  the 
  teeth. 
  On 
  the 
  tongue 
  a 
  few 
  weaker 
  teeth, 
  aud 
  

   groups 
  of 
  similar 
  teeth 
  on 
  the 
  vomer. 
  Insertion 
  of 
  dorsal 
  behind 
  snout 
  at 
  a 
  distance 
  

   a 
  little 
  more 
  than 
  its 
  own 
  base 
  and 
  about 
  one-third 
  the 
  total 
  length 
  ; 
  longest 
  ray 
  

   equal 
  to 
  greatest 
  depth 
  of 
  body. 
  No 
  adipose 
  dorsal 
  (iu 
  the 
  specimen 
  known); 
  anal 
  

   inserted 
  considerably 
  behind 
  last 
  ray 
  of 
  dorsal, 
  its 
  base 
  about 
  half 
  that 
  of 
  the 
  dorsal. 
  

   Ventrals 
  well 
  apart, 
  inserted 
  just 
  in 
  front 
  of 
  dorsal, 
  their 
  length 
  half 
  head. 
  Pectoral 
  

   as 
  long 
  as 
  lower 
  jaw, 
  its 
  seventh 
  ray 
  prolonged 
  to 
  a 
  length 
  equal 
  to 
  that 
  of 
  head. 
  

   Caudal 
  slightly 
  forked 
  ; 
  scales 
  thin, 
  cycloid, 
  deciduous, 
  those 
  of 
  the 
  lateral 
  line 
  

   larger, 
  brownish 
  ; 
  lining 
  of 
  gill 
  cavity 
  blue-black. 
  Head, 
  3*; 
  depth, 
  7. 
  B. 
  10, 
  D. 
  17, 
  

   A. 
  11, 
  C. 
  19, 
  P. 
  15, 
  A. 
  8. 
  Scales, 
  8-78-8. 
  Length, 
  18 
  inches. 
  

  

  Gulf 
  Stream, 
  lat. 
  33°, 
  at 
  a 
  depth 
  of 
  647 
  fathoms. 
  {Goode 
  $ 
  Bean.) 
  

  

  (Goode 
  & 
  Bean, 
  Bull. 
  Mus. 
  Comp. 
  Zool., 
  1882, 
  215.) 
  

  

  'This 
  species 
  should 
  staud 
  as 
  Myctophum 
  mulleri 
  instead 
  of 
  If. 
  glaciale. 
  To 
  the 
  

   synonymy 
  add 
  : 
  Salmo 
  mulleri 
  Gmelin, 
  Syst. 
  Nat. 
  1788, 
  1378 
  ; 
  Scopclus 
  mulleri, 
  Collet, 
  

   Norske 
  NordhavsExped., 
  1880, 
  Fiske, 
  158; 
  Scopelus 
  mulleri 
  Goode 
  & 
  Bean, 
  Bull. 
  Mus. 
  

   Comp. 
  Zool., 
  1882, 
  223. 
  

  

  This 
  species 
  has 
  been 
  lately 
  taken 
  in 
  the 
  deep 
  waters 
  off 
  Southern 
  New 
  England. 
  

  

  -Myctophum 
  hoops 
  Richardson. 
  

  

  Depth 
  of 
  head 
  If 
  in 
  its 
  length 
  ; 
  eye 
  nearly 
  3 
  in 
  head 
  ; 
  twice 
  its 
  distance 
  from 
  

   preopercle. 
  Snout 
  short, 
  obtuse, 
  its 
  upper 
  profile 
  descending 
  in 
  a 
  strong 
  curve 
  ; 
  jaws 
  

   equal 
  ; 
  maxillary 
  reaching 
  nearly 
  to 
  angle 
  of 
  preopercle, 
  slightly 
  and 
  gradually 
  dilated 
  

   behind 
  ; 
  cleft 
  of 
  mouth 
  very 
  slightly 
  oblique. 
  Origin 
  of 
  dorsal 
  considerably 
  nearer 
  

   tip 
  of 
  snout 
  than 
  root 
  of 
  caudal, 
  above 
  base 
  of 
  ventrals 
  ; 
  its 
  last 
  ray 
  before 
  origin 
  of 
  

   anal 
  ; 
  pectoral 
  reaching 
  vent. 
  Scales 
  smooth, 
  thin, 
  and 
  deciduous. 
  Head 
  3-J 
  ; 
  depth 
  5. 
  

   D. 
  14. 
  A. 
  21, 
  V. 
  8 
  Scales 
  3-38-5. 
  L. 
  4^ 
  inches. 
  Vancouver's 
  Island. 
  (Gunfher). 
  

  

  (Richardson, 
  Zool. 
  Erebus 
  and 
  Terror. 
  Fishes, 
  39, 
  pi. 
  27. 
  Scoijelus 
  hoops, 
  Gunther, 
  

   V, 
  408.) 
  

  

  :i 
  According 
  to 
  Professor 
  Gill, 
  the 
  genus 
  Maurolicus 
  belongs 
  to 
  the 
  Scopelidw 
  and 
  

   not 
  to 
  the 
  Steruoptychidaj. 
  

  

  