﻿ECHTNODERMATA. 
  1 
  53 
  

  

  CRINOIDEA. 
  

  

  In 
  the 
  preparation 
  of 
  this 
  portion 
  of 
  my 
  Report 
  I 
  have 
  had 
  the 
  

   very 
  considerable 
  advantage 
  of 
  the 
  kindness 
  of 
  Mr. 
  P. 
  Herbert 
  Car- 
  

   penter, 
  whose 
  work 
  on 
  this 
  group 
  is 
  so 
  well 
  known 
  to, 
  and 
  so 
  highly 
  

   appreciated 
  by, 
  his 
  fellow-workers. 
  Mr. 
  Carpenter 
  has 
  not 
  only 
  

   been 
  good 
  enough 
  to 
  favour 
  me 
  with 
  his 
  opinion 
  on 
  many 
  of 
  the 
  

   species 
  and 
  specimens 
  in 
  the 
  preseut 
  collection, 
  but, 
  at 
  what 
  must 
  

   have 
  been 
  considerable 
  trouble 
  to 
  himself, 
  he 
  copied 
  out 
  for 
  me 
  

   the 
  notes 
  that 
  he 
  had 
  been 
  able 
  to 
  make 
  at 
  various 
  times 
  and 
  

   places 
  on 
  the 
  " 
  type 
  specimens 
  " 
  of 
  the 
  species 
  named 
  by 
  the 
  illus- 
  

   trious 
  founder 
  of 
  the 
  system 
  of 
  this 
  group 
  ; 
  thanks 
  to 
  this 
  act 
  of 
  

   kindness, 
  I 
  have 
  probably 
  escaped 
  from 
  some 
  of 
  the 
  numerous 
  pitfalls 
  

   which, 
  with 
  the 
  advance 
  of 
  our 
  knowledge, 
  now 
  surround 
  the 
  student 
  

   who 
  applies 
  himself 
  to 
  Johannes 
  Miiller's 
  descriptions 
  of 
  the 
  differ- 
  

   ent 
  species. 
  As 
  Mr. 
  Carpenter 
  will, 
  in 
  the 
  progress 
  of 
  time, 
  publish 
  

   his 
  studies 
  on 
  these 
  Miillerian 
  types, 
  I 
  have 
  thought 
  it 
  proper 
  on 
  

   this 
  occasion 
  to 
  do 
  little 
  more 
  than 
  merely 
  note 
  the 
  presence 
  of 
  such 
  

   forms 
  in 
  this 
  collection. 
  

  

  The 
  proportion 
  of 
  undescribed 
  to 
  described 
  species 
  is 
  no 
  doubt 
  

   appalling 
  ; 
  but 
  on 
  making 
  a 
  careful 
  estimate 
  I 
  do 
  not 
  find 
  it 
  to 
  be 
  

   practically 
  greater 
  than 
  in 
  the 
  case 
  of 
  my 
  predecessors. 
  In 
  a 
  Note 
  

   which 
  I 
  communicated 
  to 
  the 
  Zoological 
  Society 
  in 
  May 
  1882 
  I 
  gave 
  

   a 
  list 
  of 
  all 
  the 
  described 
  species, 
  which 
  was 
  very 
  nearly 
  complete 
  : 
  

   therein 
  were 
  enumerated 
  37 
  Antedons 
  and 
  21 
  Actmometne. 
  Of 
  

   these, 
  7 
  Antedons 
  and 
  4 
  Actinometrce 
  were 
  first 
  described 
  in 
  1881, 
  

   from 
  the 
  collection 
  of 
  the 
  Leyden 
  Museum, 
  by 
  Mr. 
  Carpenter. 
  In 
  

   that 
  paper 
  the 
  percentages 
  of 
  new 
  to 
  all 
  the 
  known 
  species 
  were 
  

   respectively 
  23 
  and 
  23 
  ; 
  the 
  percentages 
  to 
  new 
  species 
  in 
  the 
  col- 
  

   lection 
  respectively 
  70 
  and 
  40. 
  

  

  As 
  there 
  are 
  here 
  described 
  12 
  new 
  species 
  of 
  Antedon^ 
  my 
  per- 
  

   centage 
  to 
  the 
  37 
  described 
  forms 
  is 
  32-5, 
  to 
  all 
  the 
  species 
  men- 
  

   tioned 
  in 
  this 
  Eeport 
  it 
  is 
  75 
  ; 
  on 
  the 
  other 
  hand, 
  there 
  are 
  some 
  5 
  

   new 
  species 
  of 
  Actinometra, 
  giving 
  a 
  percentage 
  of 
  23*5 
  to 
  all 
  the 
  

   described 
  forms, 
  and 
  of 
  38 
  to 
  those 
  enumerated 
  in 
  the 
  accompanying 
  

   Ust. 
  

  

  Against 
  this 
  higher 
  proportion 
  we 
  must, 
  however, 
  set 
  off 
  the 
  fact 
  

   that 
  five 
  of 
  the 
  earlier 
  species 
  had 
  been 
  described 
  by 
  Miiller 
  from 
  

   the 
  specimens 
  in 
  the 
  Leyden 
  Museum. 
  

  

  But 
  the 
  whole 
  story 
  has 
  not 
  yet 
  been 
  told 
  : 
  withovit, 
  of 
  course, 
  

   wanting 
  in 
  any 
  way 
  to 
  tie 
  Mr. 
  Carpenter 
  down 
  to 
  details, 
  I 
  may 
  add 
  

   that 
  his 
  examination 
  of 
  the 
  'Alert' 
  collection 
  was 
  made 
  after 
  he 
  had 
  

   examined 
  the 
  collection 
  of 
  Crinoids 
  brought 
  together 
  by 
  the 
  officers 
  

   of 
  H.M.S. 
  ' 
  Challenger,' 
  and 
  entrusted 
  to 
  him 
  for 
  description. 
  Only 
  

   a 
  single 
  form 
  among 
  the 
  "new 
  species" 
  in 
  the 
  present 
  collection 
  

   has 
  been 
  detected 
  by 
  Mr. 
  Carpenter 
  to 
  be 
  one 
  of 
  the 
  treasures 
  which 
  

   he 
  has 
  described, 
  but 
  whose 
  description 
  he 
  has 
  not 
  yet 
  published 
  ; 
  

  

  