﻿Gatty 
  Marine 
  Lahoralory, 
  St. 
  Aiulreivs. 
  97 
  

  

  a 
  conical 
  anterior 
  fold, 
  the 
  tentacles 
  with 
  their 
  j)late 
  of 
  

   insertion 
  being 
  drawn 
  inward^ 
  the 
  parts 
  in 
  the 
  respective 
  

   conditions 
  being 
  clearly 
  shown 
  in 
  FauvePs 
  figures 
  *. 
  Some 
  

   preparations 
  thus 
  show 
  an 
  outer 
  and 
  an 
  inner 
  folded 
  collar. 
  

  

  The 
  second 
  segment 
  is 
  short 
  and 
  devoid 
  of 
  processes. 
  

   The 
  third 
  bears 
  dorsally 
  the 
  fan 
  of 
  flattened 
  palese, 
  and 
  

   with 
  the 
  next 
  segment 
  (Fauvel) 
  the 
  four 
  branchise 
  on 
  each 
  

   side. 
  ll)e 
  palete 
  form 
  a 
  more 
  or 
  less 
  horizontal 
  fan 
  with 
  

   the 
  longer 
  bristles 
  internal, 
  the 
  shorter 
  external. 
  Each 
  of 
  

   the 
  larger 
  pale?e 
  has 
  a 
  flattened 
  finely 
  striated 
  shaft 
  and 
  a 
  

   tapered 
  tip 
  with 
  a 
  granular 
  interior 
  and 
  a 
  slender 
  curved 
  

   tip 
  ending 
  in 
  a 
  fine 
  point, 
  the 
  same 
  minutely 
  granular 
  

   aspect 
  being 
  present 
  in 
  it 
  as 
  in 
  the 
  region 
  below. 
  The 
  

   concave 
  edge 
  of 
  the 
  distal 
  curve 
  is 
  crenulated, 
  after 
  the 
  

   manner 
  of 
  similar 
  structures 
  in 
  the 
  Amphicteuida?. 
  

  

  The 
  brauchi'e 
  are 
  smooth 
  or 
  slightly 
  crenulate 
  tapering 
  

   organs 
  of 
  a 
  greenish 
  hue, 
  which 
  arise 
  three 
  in 
  a 
  transverse 
  

   row 
  on 
  the 
  third 
  segment 
  and 
  the 
  fourth 
  behind 
  the 
  middle 
  

   one 
  of 
  the 
  row. 
  

  

  The 
  anterior 
  region 
  is 
  distinguished 
  by 
  the 
  ventral 
  

   glandular 
  belts 
  and 
  by 
  the 
  presence 
  of 
  fourteen 
  setigerous 
  

   lamellae 
  and 
  fourteen 
  lamellse 
  for 
  the 
  hooks. 
  Whilst 
  two 
  

   or 
  three 
  of 
  the 
  anterior 
  laraellee 
  for 
  the 
  bristles 
  are 
  smaller, 
  

   the 
  typical 
  process 
  is 
  somewhat 
  flattened 
  and 
  carries 
  the 
  

   row 
  of 
  bristles 
  more 
  or 
  less 
  vertically, 
  the 
  longer 
  and 
  

   stronger 
  bristles 
  being 
  dorsal, 
  the 
  somewhat 
  shorter 
  ventral. 
  

   Each 
  bristle 
  has 
  a 
  bulb 
  at 
  its 
  origin, 
  then 
  the 
  shaft 
  dilates 
  

   a 
  little, 
  remains 
  of 
  equal 
  diameter 
  for 
  some 
  distance, 
  then 
  

   shovvs 
  a 
  slight 
  curvature 
  at 
  the 
  commencement 
  of 
  the 
  tip, 
  

   which 
  has 
  wings 
  and 
  tapers 
  to 
  a 
  hair-like 
  point. 
  About 
  

   eight 
  of 
  the 
  stronger 
  forms 
  are 
  present 
  in 
  each 
  tuft, 
  besides 
  

   a 
  series 
  apparently 
  of 
  developing 
  forms, 
  the 
  slender 
  tips 
  of 
  

   which 
  project 
  between 
  the 
  others 
  at 
  the 
  level 
  of 
  the 
  skin. 
  

   A 
  tendency 
  of 
  the 
  upper 
  tips 
  to 
  bend 
  downward 
  and 
  of 
  the 
  

   inferior 
  upward 
  is 
  often 
  apparent. 
  

  

  The 
  lamellae 
  or 
  ridges 
  for 
  the 
  hooks 
  lie 
  ventralwards 
  of 
  

   the 
  bristles 
  and 
  anteriorly 
  form 
  ridges 
  with 
  an 
  even 
  margin, 
  

   but 
  by 
  and 
  by 
  a 
  papilla 
  appears 
  at 
  the 
  dorsal 
  edge 
  and 
  forms 
  

   toward 
  the 
  end 
  of 
  the 
  region 
  a 
  cirrus 
  with 
  a 
  slender 
  tapering 
  

   extremity, 
  not 
  shown 
  by 
  Fauvel. 
  The 
  anterior 
  hooks 
  differ 
  

   from 
  the 
  outlines 
  of 
  Fauvel, 
  having 
  a 
  broader 
  body, 
  about 
  

   six 
  teeth, 
  and 
  a 
  rounded 
  prow 
  of 
  a 
  different 
  curvature 
  from 
  

   that 
  figured 
  by 
  the 
  French 
  author. 
  

  

  The 
  posterior 
  region 
  has 
  twelve 
  segments 
  and 
  is 
  dis- 
  

  

  * 
  0)\ 
  fit. 
  pi. 
  xix. 
  figs. 
  57 
  & 
  58. 
  

   Ami. 
  cO 
  Mag. 
  N. 
  Hist. 
  Ser. 
  *5. 
  To/, 
  xiii. 
  7 
  

  

  