﻿Siphonopkora 
  of 
  the 
  Canary 
  Islands. 
  225 
  

  

  perfectly 
  the 
  characters 
  of 
  the 
  form 
  subsequently 
  described 
  by 
  

   Claus 
  as 
  Monophyes 
  gracilis. 
  I 
  would 
  therefore 
  propose 
  to 
  

   refer 
  those 
  species 
  which 
  are 
  characterized 
  by 
  an 
  elongated 
  

   tubular 
  sheath 
  running 
  to 
  the 
  middle 
  of 
  the 
  umbrella 
  to 
  the 
  

   genus 
  Sphwronectes, 
  and, 
  on 
  the 
  other 
  hand, 
  to 
  retain 
  the 
  

   generic 
  name 
  of 
  Monophyes 
  for 
  those 
  species 
  which 
  are 
  dis- 
  

   tinguished 
  by 
  a 
  short 
  funnel-shaped 
  sheath, 
  reaching 
  only 
  to 
  

   the 
  lateral 
  walls 
  of 
  the 
  subumbrella 
  (after 
  the 
  type 
  of 
  Mono- 
  

   phyes 
  irregular 
  is 
  , 
  Claus). 
  

  

  Hackel 
  divides 
  the 
  Monophyidse 
  into 
  two 
  subfamilies 
  — 
  

   Sphseronectidae 
  and 
  Cymbonectidee. 
  I 
  adopt 
  this 
  division 
  

   because 
  as 
  yet 
  we 
  have 
  no 
  evidence 
  of 
  a 
  primary 
  heteromor- 
  

   phous 
  nectocalyx 
  in 
  the 
  Sphseronectidae, 
  whereas 
  with 
  regard 
  

   to 
  the 
  Cymbonectidae 
  with 
  angular 
  calyces 
  I 
  have 
  furnished 
  

   evidence 
  of 
  a 
  primary 
  calyx 
  in 
  Muggiaza 
  *. 
  I 
  would, 
  how- 
  

   ever, 
  remark 
  that 
  the 
  form 
  of 
  the 
  rounded 
  cap-shaped 
  calyces 
  

   of 
  the 
  Sphseronectidae 
  is 
  recapitulated 
  in 
  the 
  development 
  of 
  

   the 
  Calycophoridae. 
  

  

  Subfam. 
  1. 
  Sph.ebonectid.e, 
  Huxl. 
  

  

  1. 
  Monophyes 
  brevitruncata, 
  sp. 
  n. 
  

  

  Umbrella 
  thin-walled. 
  Oil-receptacle 
  relatively 
  large, 
  

   ascending 
  almost 
  perpendicularly. 
  Stem 
  abbreviated, 
  pre- 
  

   senting, 
  besides 
  the 
  undeveloped 
  buds 
  on 
  the 
  basal 
  portion, 
  

   only 
  two 
  groups 
  of 
  appendages 
  (cormidia, 
  Hack.). 
  The 
  

   latter 
  are 
  set 
  free 
  as 
  Diplophysae, 
  which 
  resemble 
  in 
  appear- 
  

   ance 
  those 
  of 
  M. 
  irregularis. 
  They 
  differ 
  from 
  these 
  by 
  their 
  

   relatively 
  smaller 
  hydrophyllium, 
  which 
  is 
  traversed 
  by 
  a 
  

   considerable 
  oil-receptacle, 
  reaching 
  nearly 
  to 
  the 
  top 
  of 
  the 
  

   hydrophyllium. 
  The 
  gono-nectocalyx 
  is 
  very 
  large, 
  thin- 
  

   walled, 
  and 
  shows 
  at 
  its 
  base 
  the 
  rudiments 
  of 
  two 
  reserve- 
  

   calyces. 
  I 
  name 
  it 
  Diplophysa 
  codonella. 
  Once 
  I 
  observed 
  

   a 
  perfectly 
  developed 
  Diplop>hysa-gxo 
  i 
  a\) 
  at 
  the 
  extremity 
  of 
  

   the 
  stem, 
  a 
  proof 
  that 
  the 
  groups 
  only 
  separate 
  late 
  and 
  that 
  

   the 
  stem 
  always 
  remains 
  remarkably 
  short. 
  

  

  Monophyes 
  brevitruncata 
  appeared 
  very 
  sparingly 
  with 
  the 
  

   groups 
  belonging 
  to 
  it 
  in 
  the 
  course 
  of 
  the 
  winter 
  and 
  spring. 
  

  

  2. 
  Monophyes 
  irregularis, 
  Claus. 
  

  

  3. 
  Sphceronectes 
  gracilis 
  , 
  Claus 
  (S. 
  Kollikeri?, 
  Huxl.). 
  

   The 
  two 
  last-named 
  Monophyidse. 
  appeared 
  more 
  abun- 
  

   # 
  Sitzungsb. 
  Akad. 
  Wiss. 
  Berlin, 
  1882, 
  ii. 
  p. 
  1155. 
  

  

  