﻿292 
  Miscellaneous. 
  

  

  Note 
  on 
  Antedon 
  pumila 
  and 
  A. 
  incommoda. 
  

   By 
  F. 
  Jeffrey 
  Bell. 
  

  

  On 
  p. 
  157 
  of 
  the 
  ' 
  Alert 
  ' 
  Report 
  * 
  I 
  stated 
  that 
  the 
  second 
  pinnule 
  

   of 
  Antedon 
  pumila 
  was 
  longer 
  than 
  the 
  first 
  ; 
  as 
  a 
  matter 
  of 
  fact 
  it 
  

   is 
  the 
  first 
  that 
  is 
  longer 
  than 
  the 
  second. 
  This 
  error 
  has 
  proved 
  to 
  

   be 
  more 
  than 
  usually 
  unfortunate, 
  for 
  it 
  led 
  Dr. 
  H. 
  Carpenter 
  t 
  to 
  

   assign 
  it 
  to 
  a 
  group 
  of 
  species 
  with 
  which 
  it 
  has 
  no 
  special 
  relation, 
  

   and 
  to 
  my 
  institution 
  J 
  of 
  a 
  new 
  species, 
  A. 
  incommoda, 
  for 
  

   examples 
  of 
  what 
  are 
  really 
  A. 
  pumila. 
  I 
  regret, 
  moreover, 
  to 
  learn 
  

   that 
  it 
  has 
  caused 
  some 
  trouble 
  to 
  the 
  ardent 
  naturalists 
  who 
  are 
  

   now 
  working 
  so 
  actively 
  in 
  Australia. 
  

  

  The 
  Fauna 
  of 
  the 
  Eifel-Maare. 
  By 
  Dr. 
  Otxo 
  Zacharias. 
  

  

  At 
  the 
  suggestion 
  of 
  Prof. 
  F. 
  Leydig 
  the 
  author 
  made 
  an 
  excur- 
  

   sion 
  into 
  the 
  region 
  of 
  the 
  Eifel 
  in 
  order 
  to 
  examine 
  some 
  of 
  the 
  

   so-called 
  " 
  maare." 
  

  

  In 
  the 
  Gemiindener 
  Maar, 
  near 
  Daun, 
  he 
  ascertained 
  the 
  presence 
  

   of 
  a 
  pelagic 
  fauna, 
  although 
  the 
  lake 
  is 
  but 
  small, 
  measuring 
  only 
  

   8 
  - 
  3 
  hectares. 
  The 
  pelagic 
  fauna 
  consisted 
  of 
  swarms 
  of 
  a 
  cinnabar- 
  

   red 
  Diaptomus 
  {D. 
  pygmceus, 
  Yosseler, 
  sp. 
  n.), 
  of 
  innumerable 
  speci- 
  

   mens 
  of 
  Asplanchna 
  helvetica, 
  of 
  colonies 
  of 
  Conockilus 
  volvox, 
  and 
  

   isolated 
  examples 
  of 
  Daphnella 
  brachyura, 
  Liev. 
  In 
  the 
  littoral 
  

   zone 
  there 
  are 
  other 
  species 
  of 
  Daphuiidae, 
  some 
  Lynceidae, 
  and 
  

   various 
  species 
  of 
  Protozoa. 
  Among 
  them 
  several 
  species 
  of 
  Hy- 
  

   drachnidoe, 
  especially 
  Hygrobatcs 
  longipalpis, 
  Herm., 
  occur 
  in 
  abun- 
  

   dance. 
  

  

  The 
  Laacher 
  See, 
  which 
  is 
  only 
  a 
  large 
  " 
  maar," 
  also 
  contains 
  a 
  

   pelagic 
  fauna, 
  which, 
  however, 
  includes 
  other 
  species 
  than 
  those 
  of 
  

   the 
  small 
  Gemiindener 
  Maar. 
  Here 
  Daphnia 
  vitrea, 
  Kurz, 
  occurred, 
  

   among 
  numerous 
  examples 
  of 
  Polyarthra 
  platyptera, 
  Ehr., 
  Anurcea 
  

   longispina, 
  Conochilus 
  volvox, 
  and 
  the 
  Dinoflagellate 
  Ceratium 
  

   hirundinella, 
  Bergh. 
  

  

  The 
  author 
  remarks 
  upon 
  the 
  fact 
  that 
  in 
  such 
  confined 
  crater- 
  

   lakes 
  as 
  the 
  " 
  maars 
  " 
  of 
  the 
  Eifel 
  a 
  pelagic 
  fauna 
  has 
  been 
  esta- 
  

   blished. 
  He 
  regards 
  this 
  as 
  an 
  evidence 
  of 
  transportation 
  by 
  flying 
  

   organisms, 
  although 
  in 
  many 
  cases 
  the 
  wind 
  may 
  come 
  into 
  opera- 
  

   tion, 
  by 
  carrying 
  encysted 
  Protozoa, 
  for 
  example, 
  high 
  into 
  the 
  air, 
  

   and 
  thus 
  transplanting 
  them 
  into 
  distant 
  waters. 
  Water-beetles 
  

   also 
  he 
  regards 
  as 
  important 
  agents 
  in 
  the 
  transfer. 
  — 
  Biol. 
  Central- 
  

   Matt, 
  November 
  15, 
  1888, 
  p. 
  574. 
  

  

  * 
  London, 
  1884. 
  

  

  t 
  ' 
  Challenger 
  ' 
  Reports, 
  part 
  lx. 
  p. 
  193. 
  

  

  t 
  Ann. 
  & 
  Mag. 
  N. 
  H. 
  (6) 
  ii. 
  p. 
  404. 
  

  

  