﻿510 
  Bibliographical 
  Notices. 
  

  

  There 
  are 
  no 
  tridisiichate 
  species 
  of 
  Antedon 
  in 
  the 
  North 
  

   Atlantic 
  outside 
  the 
  Caribhean 
  Sea, 
  though 
  they 
  occur 
  in 
  the 
  South 
  

   Atlantic 
  at 
  Tristan 
  d'Acunha 
  and 
  Ascension 
  and 
  at 
  five 
  stations 
  

   below 
  100 
  fathoms 
  in 
  the 
  Western 
  Pacific 
  and 
  Australasia. 
  

  

  On 
  the 
  other 
  hand, 
  the 
  bidistichate 
  series 
  does 
  not 
  range 
  further 
  

   south 
  in 
  the 
  Atlantic 
  than 
  10° 
  S., 
  though 
  it 
  has 
  the 
  same 
  distribu- 
  

   tion 
  as 
  the 
  tridistichate 
  series 
  in 
  the 
  Pacific. 
  This 
  group 
  is 
  also 
  

   much 
  more 
  common 
  than 
  the 
  tridistichate 
  group 
  in 
  the 
  Caribbean 
  

   Sea, 
  especially 
  below 
  100 
  fathoms, 
  and 
  ranges 
  to 
  a 
  greater 
  depth. 
  

  

  The 
  range 
  of 
  the 
  genus 
  Actinometra 
  both 
  in 
  depth 
  and 
  space 
  is 
  

   very 
  much 
  more 
  limited 
  than 
  that 
  of 
  Antedon. 
  It 
  corresponds 
  very 
  

   closely 
  with 
  the 
  geographical 
  and 
  bathymetrical 
  ranges 
  of 
  the 
  

   multibrachiate 
  species 
  of 
  that 
  genus. 
  The 
  northernmost 
  Actino- 
  

   metra 
  docs 
  not 
  reach 
  36° 
  N., 
  and 
  the 
  southernmost 
  38° 
  S., 
  and 
  no 
  

   Actinometra 
  has 
  been 
  obtained 
  with 
  certainty 
  at 
  a 
  greater 
  depth 
  

   than 
  533 
  fathoms 
  ; 
  but 
  it 
  may 
  probably 
  extend 
  to 
  830 
  fathoms. 
  

   Actinometra 
  is 
  far 
  more 
  extensively 
  developed 
  in 
  the 
  Eastern 
  than 
  

   in 
  the 
  "Western 
  Hemisphere. 
  The 
  ten-armed 
  forms 
  of 
  Actinometra 
  

   which 
  occur 
  in 
  the 
  Caribbean 
  Sea 
  and 
  along 
  the 
  South-American 
  

   coast 
  represent 
  an 
  entirely 
  different 
  type 
  of 
  the 
  genus 
  from 
  the 
  ten- 
  

   armed 
  species 
  of 
  the 
  Eastern 
  Hemisphere. 
  Of 
  the 
  multibrachiate 
  

   species 
  of 
  Actinometra 
  the 
  tridistichate 
  type 
  seems 
  to 
  bo 
  the 
  more 
  

   extensively 
  distributed, 
  and 
  not 
  the 
  bidistichate 
  one, 
  as 
  in 
  the 
  case 
  

   of 
  Antedon. 
  

  

  The 
  number 
  of 
  described 
  living 
  Comatulid 
  species 
  is 
  now 
  180 
  ; 
  of 
  

   these 
  tho 
  'Challenger' 
  obtained 
  110, 
  88 
  being 
  new 
  to 
  science 
  and 
  

   22 
  previously 
  known. 
  

  

  The 
  geographical 
  and 
  bathymetrical 
  limitation 
  of 
  the 
  different 
  

   groups 
  indicated 
  by 
  the 
  author 
  furnishes 
  evidence 
  of 
  the 
  direct 
  

   alliance 
  and 
  the 
  genetic 
  relations 
  of 
  the 
  component 
  members 
  of 
  the 
  

   groups 
  in 
  a 
  manner 
  that 
  comparative 
  anatomy 
  alone 
  is 
  unable 
  to 
  

   demonstrate 
  half 
  so 
  forcibly 
  or 
  conclusively. 
  

  

  The 
  monograph 
  is 
  illustrated 
  by 
  seventy 
  magnificent 
  plates, 
  which 
  

   for 
  general 
  fidelity 
  and 
  careful 
  representation 
  of 
  detail 
  are 
  worthy 
  

   of 
  tho 
  highest 
  praise. 
  There 
  is 
  also 
  an 
  excellent 
  index, 
  which 
  

   forms 
  in 
  itself 
  a 
  measure 
  of 
  the 
  completeness 
  and 
  general 
  utility 
  of 
  

   the 
  Report. 
  

  

  It 
  is 
  no 
  mere 
  form 
  of 
  words 
  to 
  say 
  that 
  this 
  Report 
  will 
  stand 
  as 
  

   a 
  monument 
  of 
  patient 
  and 
  honest 
  work 
  ; 
  and 
  we 
  offer 
  to 
  the 
  author 
  

   our 
  congratulations 
  on 
  having 
  produced 
  a 
  memoir 
  upon 
  which 
  he 
  

   may 
  look 
  back 
  with 
  satisfaction 
  and 
  his 
  fellow-countrymen 
  with 
  

   pride. 
  

  

  Tabular 
  List 
  of 
  all 
  the 
  Australian 
  Birds 
  at 
  present 
  known 
  to 
  the 
  

   Author, 
  shoiving 
  the 
  Distribution 
  of 
  the 
  Species 
  over 
  the 
  Continent 
  

   of 
  Australia 
  and 
  adjacent 
  Islands. 
  P>y 
  E. 
  P. 
  Ramsay, 
  LL.D., 
  

   &c., 
  Curator 
  of 
  the 
  Australian 
  Museum, 
  Sydney. 
  Pp. 
  38, 
  Map. 
  

   4to. 
  Sydney, 
  1888. 
  

  

  The 
  object 
  of 
  this 
  Catalogue 
  is 
  to 
  afford 
  ornithologists 
  a 
  general 
  

  

  