﻿612 
  

  

  REPORT 
  OF 
  COMMISSIONER 
  OF 
  ELSH 
  AND 
  FISHERIES. 
  

  

  [»] 
  

  

  cies 
  in 
  which 
  they 
  are 
  known, 
  as 
  well 
  as 
  the 
  records 
  of 
  their 
  capture*, 
  

   indicate 
  that 
  they 
  are 
  all 
  abyssal, 
  or 
  at 
  least 
  deep 
  water 
  species. 
  

  

  The 
  form 
  of 
  the 
  body 
  and 
  the 
  structure 
  of 
  the 
  peneopods 
  of 
  Pasiphae 
  

   prinaeps 
  indicate 
  that, 
  like 
  the 
  other 
  species 
  of 
  the 
  genus, 
  it 
  is 
  a 
  free- 
  

   swimming 
  species, 
  probably 
  never 
  resting 
  on 
  the 
  bottom. 
  It 
  is 
  proba- 
  

   bly 
  neither 
  a 
  truly 
  abyssal, 
  nor, 
  judging 
  from 
  the 
  size 
  of 
  the 
  eggs 
  as 
  well 
  

   as 
  the 
  record 
  of 
  its 
  capture, 
  a 
  surface 
  species. 
  The 
  structure 
  of 
  the 
  

   eyes, 
  the 
  very 
  small 
  number 
  and 
  great 
  size 
  of 
  the 
  eggs, 
  and 
  the 
  soft 
  in- 
  

   tegument 
  of 
  the 
  species 
  of 
  Parapasiphae 
  render 
  it 
  probable 
  that 
  they 
  are 
  

   really 
  abyssal 
  species, 
  though 
  probably 
  not 
  couiiued 
  to 
  the 
  immediate 
  

   region 
  of 
  the 
  bottom. 
  

  

  The 
  eight 
  species 
  of 
  PenaeidsB 
  in 
  the 
  list 
  are 
  undoubtedly 
  all 
  free- 
  

   swimming 
  forms 
  not 
  confined 
  to 
  the 
  immediate 
  region 
  of 
  the 
  bottom, 
  

   but, 
  judging 
  from 
  the 
  relatively 
  small 
  size 
  of 
  the 
  eyes 
  and 
  the 
  presence 
  

   of 
  well-developed 
  ocular 
  papilhe, 
  they 
  are 
  all 
  deep-water 
  if 
  not 
  abyssal 
  

   species. 
  

  

  The 
  records 
  of 
  the 
  occurrence 
  of 
  the 
  three 
  species 
  of 
  Sergestes 
  show 
  

   (hat 
  they 
  are 
  not 
  confined 
  to 
  abyssal 
  depths. 
  The 
  relatively 
  small 
  eyes 
  

   and 
  exceedingly 
  soft 
  integument 
  of 
  S. 
  mollis 
  would 
  seem 
  to 
  indicate 
  

   that 
  it 
  inhabited 
  much 
  greater 
  depths 
  than 
  the 
  other 
  species, 
  but 
  the 
  

   records 
  of 
  its 
  capture 
  afford 
  no 
  additional 
  evidence 
  of 
  this. 
  

  

  We 
  may 
  then 
  divide 
  these 
  species 
  provisionally 
  into 
  the 
  four 
  follow- 
  

   in 
  a 
  - 
  classes: 
  

  

  I. 
  — 
  Species 
  inhabiting 
  the 
  bottom 
  or 
  its 
  immediate 
  neighborhood. 
  

  

  Geryon 
  quinquedens. 
  

   Ethusina 
  abyssicola. 
  

   Lithodes 
  Agassizii. 
  

   Parapagurus 
  pilosimanus. 
  

   Munidopsis 
  curvirostra. 
  

   Munidopsis 
  crassa. 
  

   Munidopsis 
  similis. 
  

   Munidopsis 
  Bairdii. 
  

   M 
  unidopsis 
  rostrata. 
  

   Pentacheles 
  sculptus. 
  

   Pentacheles 
  nanus. 
  

  

  Pentacheles 
  debilis. 
  

   Sclerocrangon 
  Agassizii. 
  

   Pontophilus 
  abyssi. 
  

   Sabinea 
  princeps. 
  

   Glyphocrangon 
  sculpt 
  us. 
  

   Glyphocrangon 
  longirostris. 
  

   Bythocaris 
  gracilis. 
  

   Heterocarpus 
  oryx. 
  

   Nematocarcin 
  us 
  ensi 
  fer 
  us! 
  

   Nematocarciuus 
  cursor. 
  

  

  II. 
  — 
  Species 
  probably 
  not 
  confined 
  to 
  the 
  immediate 
  neighborhood 
  of 
  the 
  

   bottom, 
  but 
  showing 
  structural 
  evidences 
  of 
  inhabiting 
  abyssal 
  depths. 
  

  

  Acanthephyra 
  microphthalma. 
  

   Acanthephyra 
  brevirostris. 
  

   ISrotostomus 
  robustus. 
  

   Notostomus 
  vescus. 
  

   Meningodora 
  mollis. 
  

  

  I 
  lymenodora 
  glacialis. 
  

   Hymenodora 
  gracilis. 
  

   Parapasiphae 
  sulcatifrous. 
  

   Parapasiphae 
  cristata. 
  

   Parapasiphae 
  compta. 
  

  

  