﻿9G 
  Prof. 
  M'lntosU's 
  Notes 
  from 
  the 
  

  

  4, 
  On 
  the 
  British 
  Ampliaretidfe. 
  

  

  No 
  example 
  of 
  the 
  Ampliaretidse 
  was 
  entered 
  in 
  Dr. 
  John- 
  

   ston's 
  Catalogue 
  in 
  1865 
  ; 
  two, 
  viz. 
  Melinna 
  adriatica, 
  

   Marenzeller, 
  and 
  Amphicteis 
  curvipalea, 
  Claparede 
  = 
  A. 
  

   gunneri, 
  Sars, 
  appeared 
  in 
  the 
  Plymouth 
  Catalogue 
  in 
  1904; 
  

   whilst 
  a 
  single 
  species, 
  Ampharete 
  (jrubei, 
  Malmgren, 
  occurs 
  

   in 
  Mr. 
  Southern's 
  ' 
  Annelids 
  of 
  Dublin 
  Bay.' 
  

  

  The 
  first 
  species 
  is 
  Ampharete 
  grubei, 
  Malragren, 
  from 
  

   English, 
  Scotch, 
  and 
  Irish 
  areas, 
  generally 
  in 
  water 
  of 
  some 
  

   depth 
  (10-100 
  fathoms), 
  though 
  it 
  occurs 
  between 
  tide- 
  

   marks 
  on 
  the 
  shores 
  of 
  France. 
  This 
  form 
  reaches 
  nearly 
  

   an 
  inch 
  in 
  length 
  in 
  spirit, 
  and 
  is 
  slightly 
  tapered 
  anteriorly, 
  

   the 
  bristled 
  region 
  of 
  fourteen 
  segments 
  being 
  narrowed 
  

   both 
  anteriorly 
  and 
  posteriori}^, 
  and 
  terminating 
  in 
  the 
  

   narrower 
  uncinigerous 
  region 
  of 
  twelve 
  segments, 
  the 
  

   caiulal 
  extremity 
  having 
  a 
  series 
  of 
  slender 
  filiform 
  cirri. 
  

   Genei-ally 
  speaking, 
  the 
  segments 
  of 
  the 
  anterior 
  region 
  

   are 
  narrow, 
  those 
  of 
  the 
  posterior 
  region 
  are 
  wider. 
  The 
  

   terminal 
  segment 
  is 
  comparatively 
  small, 
  and 
  the 
  filiform 
  

   tapering 
  cirri, 
  which 
  Malmgren 
  says 
  are 
  twenty 
  in 
  number, 
  

   seem 
  to 
  surround 
  the 
  vent. 
  The 
  body 
  is 
  somewhat 
  smoothly 
  

   rounded 
  dorsally, 
  flattened 
  and 
  marked 
  by 
  a 
  median 
  band 
  

   ventrally. 
  

  

  The 
  cephalic 
  lobe 
  is, 
  as 
  Fauvel 
  describes, 
  more 
  or 
  less 
  

   pentagonal, 
  the 
  two 
  anterior 
  lines 
  of 
  the 
  pentagon 
  sloping 
  

   obliquely 
  forward 
  and 
  inward 
  so 
  as 
  to 
  make 
  a 
  blunt 
  cone. 
  

   At 
  the 
  posterior 
  border 
  of 
  this 
  region 
  is 
  on 
  each 
  side 
  a 
  

   minute 
  eye, 
  generally 
  indistinct 
  in 
  spirit-preparations. 
  

  

  The 
  buccal 
  segment 
  is 
  narrow 
  and 
  bears 
  inferiorly 
  the 
  

   buccal 
  tentacles, 
  which 
  Fauvel 
  frequently 
  found 
  in 
  life 
  in 
  

   the 
  mouth. 
  The 
  tentacles 
  taper 
  from 
  base 
  to 
  apex, 
  which 
  

   in 
  the 
  preparations 
  is 
  often 
  slightly 
  enlarged. 
  The 
  base 
  of 
  

   each 
  is 
  smooth, 
  the 
  small 
  papillje 
  appearing 
  laterally 
  and 
  

   increasing 
  in 
  length 
  in 
  the 
  slender 
  distal 
  region 
  of 
  the 
  organ, 
  

   the 
  tip, 
  however, 
  being 
  bare. 
  A 
  typical 
  papilla 
  is 
  a 
  trans- 
  

   lucent 
  cylindrical 
  process 
  of 
  the 
  hypoderm 
  covered 
  with 
  

   cuticle, 
  and 
  having 
  microscojjic 
  palpocils 
  at 
  the 
  tip, 
  the 
  

   space 
  between 
  the 
  rows 
  of 
  papillcC 
  being 
  ciliated, 
  whilst 
  

   the 
  convex 
  dorsal 
  surface 
  has 
  palpocils, 
  and 
  their 
  cavities 
  

   communicate 
  with 
  the 
  coelomic 
  space 
  (Fanvel). 
  In 
  struc- 
  

   ture 
  these 
  papillae 
  thus 
  differ 
  from 
  those 
  of 
  Sahellides, 
  which 
  

   have 
  the 
  internal 
  axis. 
  

  

  The 
  mouth 
  has, 
  >vhen 
  closed, 
  a 
  jiuckered 
  margin 
  Avith 
  

  

  