﻿82 
  Prof. 
  M'liitosli's 
  Notes 
  from 
  the 
  

  

  by 
  the 
  somewhat 
  long 
  clavate 
  papillse, 
  which 
  became 
  shorter 
  

   and 
  ceased 
  about 
  the 
  commencement 
  of 
  the 
  distal 
  third 
  of 
  

   the 
  process, 
  and 
  tlms 
  contrasted 
  with 
  conditions 
  in 
  the 
  

   Prionospio 
  plumosa 
  of 
  Sars. 
  The 
  dorsal 
  bristles 
  consisted 
  of 
  

   winged 
  forms 
  (PL 
  VI. 
  fig. 
  5) 
  and 
  of 
  others 
  in 
  which 
  the 
  wing 
  

   was 
  not 
  distinct, 
  but 
  which 
  had 
  the 
  axis 
  granular 
  and 
  so 
  

   arranged 
  in 
  some 
  as 
  to 
  give 
  a 
  transversely 
  barred 
  appearance 
  

   (PI. 
  VI. 
  fig. 
  6) 
  . 
  In 
  the 
  middle 
  of 
  the 
  body 
  the 
  ventral 
  hooks, 
  

   besides 
  a 
  few 
  very 
  slender 
  capillary 
  forms, 
  had 
  at 
  the 
  ventral 
  

   edge 
  a 
  single 
  strong 
  curved 
  bristle 
  (PI. 
  VI. 
  fig. 
  7). 
  The 
  

   hooks 
  were 
  rather 
  slender 
  and 
  long, 
  with 
  a 
  main 
  fang 
  and 
  

   two 
  or 
  three 
  teeth 
  above 
  it 
  in 
  a 
  lateral 
  view 
  (PI. 
  VI. 
  tig. 
  8). 
  

  

  The 
  branchia 
  is 
  apparently 
  broader 
  than 
  Malmgren's 
  

   fi"ui'e 
  would 
  indicate, 
  and 
  broader 
  than 
  the 
  form 
  described 
  

   by 
  Sars 
  or 
  in 
  that 
  from 
  the 
  ' 
  Valorous,' 
  but 
  it 
  is 
  less 
  elon- 
  

   gate 
  than 
  that 
  of 
  the 
  British 
  form, 
  the 
  Prionospio 
  malmgreni 
  

   of 
  Claparede. 
  

  

  Latelv 
  Mr. 
  R. 
  Southern, 
  who 
  is 
  doing 
  so 
  much 
  good 
  work 
  

   amongst 
  the 
  Irish 
  Annelids, 
  procured 
  in 
  a 
  tow-net 
  attached 
  to 
  

   the 
  trawl 
  oft" 
  Balbriggan, 
  and 
  also 
  on 
  muddy 
  ground 
  at 
  various 
  

   pai'ts 
  of 
  the 
  Irish 
  coast, 
  small 
  specimens 
  of 
  a 
  Priotwspio, 
  

   two 
  of 
  which 
  he 
  kindly 
  sent 
  me. 
  He 
  refers 
  to 
  this 
  form 
  as 
  

   Prionospio 
  steenstrupi, 
  Malmgren*, 
  but 
  it 
  agrees 
  rather 
  with 
  

   the 
  form 
  described 
  by 
  Claparede'^ 
  as 
  P. 
  malmgreni. 
  

  

  The 
  minuteness 
  of 
  the 
  preserved 
  specimens 
  made 
  it 
  difficult 
  

   to 
  determine 
  the 
  presence 
  or 
  absence 
  of 
  a 
  cephalic 
  ridge 
  ; 
  

   but, 
  so 
  far 
  as 
  could 
  be 
  seen, 
  it 
  was 
  indicated. 
  The 
  head 
  termi- 
  

   nates 
  anteriorlv 
  in 
  a 
  truncated 
  snout, 
  with 
  four 
  eyes 
  — 
  two 
  

   rounded, 
  anterior, 
  composed 
  of 
  several 
  crystalline 
  spheres 
  

   and 
  dark 
  pigment, 
  and 
  after 
  an 
  interval 
  two 
  elongated 
  or 
  

   kidney-shaped 
  masses 
  of 
  pigment. 
  This 
  form 
  is 
  thus 
  in 
  

   contrast 
  with 
  the 
  Canadian, 
  in 
  almost 
  every 
  example 
  of 
  

   which, 
  as 
  mentioned, 
  the 
  extruded 
  proboscis 
  had 
  distorted 
  

   the 
  snout. 
  The 
  proboscis 
  in 
  the 
  latter 
  had 
  a 
  slightly 
  tapered 
  

   basal 
  process 
  with 
  a 
  button-like 
  tip. 
  A 
  prominent 
  cephalic 
  

   ridge 
  occupied 
  the 
  centre 
  of 
  the 
  dorsum, 
  and 
  terminated 
  

   posteriorly 
  in 
  a 
  pointed 
  process 
  like 
  an 
  adnate 
  tentacle. 
  It 
  

   closely 
  agrees, 
  however, 
  with 
  P. 
  malmgreni 
  of 
  Claparede. 
  

  

  The 
  body 
  is 
  elongated, 
  resembling 
  posteriorly 
  that 
  of 
  a 
  

   small 
  Nereid, 
  but 
  anteriorly 
  characteristically 
  enlarged 
  and 
  

   gently 
  tapering 
  posteriorly 
  to 
  the 
  vent, 
  which 
  has 
  two 
  cirri. 
  

   Claparede's 
  examples 
  were 
  all 
  small, 
  viz. 
  11-12 
  mm., 
  yet 
  

   the 
  females 
  were 
  mature, 
  a 
  bunch 
  of 
  orange 
  ova 
  occurring 
  on 
  

   pach 
  side 
  of 
  the 
  intestine 
  behind 
  the 
  fifteenth 
  segment. 
  

  

  * 
  Aiiiiel 
  Chetop. 
  Jsapoli, 
  p. 
  '.V.i'^>, 
  pi. 
  xxii. 
  tig. 
  3. 
  

  

  