﻿172 
  Notes 
  from 
  the 
  Gatty 
  Marine 
  Laboratory. 
  

  

  slender 
  branchiae 
  project 
  from 
  the 
  dorsal 
  edge 
  of 
  more 
  than 
  

   twenty 
  of 
  the 
  anterior 
  feet, 
  and 
  traces 
  appeared 
  in 
  some 
  

   considerably 
  behind 
  these. 
  The 
  anterior 
  segments 
  are 
  

   closely 
  arranged, 
  but 
  posteriorly 
  they 
  are 
  a 
  little 
  less 
  so, 
  and 
  

   the 
  number 
  is 
  probably 
  from 
  seventy 
  to 
  one 
  hundred, 
  though 
  

   no 
  specimen 
  is 
  complete. 
  

  

  Some 
  had 
  well-developed 
  ova 
  in 
  July. 
  

  

  The 
  structure 
  of 
  the 
  feet 
  throughout 
  is 
  the 
  same, 
  viz., 
  a 
  

   dorsal 
  and 
  a 
  ventral 
  setigerous 
  process, 
  each 
  having 
  a 
  tuft 
  of 
  

   translucent 
  pale 
  yellow 
  capillary 
  bristles 
  (PI. 
  VII. 
  fig. 
  12«), 
  

   the 
  tips 
  being 
  slightly 
  flattened 
  at 
  the 
  somewhat 
  narrow 
  

   base, 
  and 
  tapering 
  to 
  delicate 
  hair-like 
  extremities. 
  The 
  

   dorsal 
  are 
  the 
  longer, 
  and 
  they 
  increase 
  in 
  length 
  toward 
  

   the 
  middle 
  of 
  the 
  body, 
  and 
  remain 
  of 
  considerable 
  length 
  

   posteriorly, 
  where 
  the 
  distinction 
  between 
  the 
  more 
  slender 
  

   and 
  longer 
  dorsal 
  and 
  the 
  shorter 
  and 
  proportionally 
  broader 
  

   ventral 
  is 
  maintained. 
  A 
  curious 
  series 
  of 
  coiled 
  tubes 
  (?) 
  

   occurs 
  posteriorly. 
  

  

  EXPLANATION 
  OF 
  THE 
  PLATES. 
  

   Plate 
  V. 
  

  

  Fig. 
  1. 
  View 
  of 
  Nevaya 
  whiteavesi 
  from 
  the 
  dorsum. 
  The 
  proboscis 
  pro- 
  

   jects 
  posteriorly 
  from 
  the 
  ruptured 
  end. 
  Enlarged. 
  

  

  Fig. 
  1 
  a. 
  Head 
  and 
  anterior 
  region 
  of 
  the 
  foregoing, 
  still 
  more 
  enlarged. 
  

  

  Fig. 
  1 
  b. 
  Strong 
  hooked 
  bristle 
  of 
  first 
  foot. 
  X 
  Zeiss 
  oc. 
  4, 
  obj. 
  A. 
  

  

  Fig. 
  1 
  c. 
  Powerful 
  hook 
  of 
  the 
  second 
  foot. 
  X 
  Zeiss 
  oc. 
  4, 
  obj. 
  A+l 
  in. 
  

   draw-tube. 
  

  

  Fig. 
  1 
  d. 
  One 
  of 
  the 
  first 
  dorsal 
  bristles, 
  x 
  Zeiss 
  oc. 
  4, 
  obj. 
  D.^ 
  

  

  Fig. 
  1 
  e. 
  Dorsal 
  bristle 
  of 
  the 
  second 
  foot. 
  X 
  Zeiss 
  oc. 
  4, 
  obj. 
  D. 
  

  

  Fig. 
  If. 
  Bristle 
  with 
  curved 
  and 
  serrated 
  tip 
  from 
  the 
  ventral 
  division 
  

   of 
  the 
  fourth 
  foot. 
  X 
  Zeiss 
  oc. 
  4, 
  obj. 
  D. 
  

  

  Fig. 
  1 
  g. 
  Stouter 
  serrated 
  bristle 
  from 
  the 
  same 
  region. 
  X 
  as 
  above. 
  

  

  Fig. 
  1 
  h. 
  Posterior 
  dorsal 
  bristle. 
  X 
  as 
  before. 
  

  

  Fig. 
  2. 
  Bristle 
  of 
  Cirratulus 
  tessellatus. 
  X 
  Zeiss 
  oc. 
  4, 
  obj. 
  D. 
  

  

  Fig. 
  3 
  a. 
  Anterior 
  hook 
  of 
  the 
  foregoing, 
  x 
  Zeiss 
  oc. 
  4, 
  obj. 
  D 
  + 
  l 
  in, 
  

   draw-tube. 
  

  

  Plate 
  VI. 
  

  

  Fig. 
  3. 
  Simple 
  anterior 
  bristle 
  of 
  Heterocirrus 
  gravieri, 
  with 
  minutely 
  

   serrated 
  anterior 
  edge. 
  X 
  Zeiss 
  oc. 
  4, 
  obj. 
  B-(-full 
  draw- 
  

   tube. 
  

  

  Fig. 
  4. 
  Bristle 
  of 
  Chcetozone 
  A, 
  showing 
  entire 
  outline, 
  x 
  Zeiss 
  oc. 
  2, 
  

   obj. 
  D 
  reduced. 
  

  

  Fig. 
  4 
  a. 
  Tip 
  of 
  one 
  of 
  the 
  foregoing 
  of 
  less 
  breadth. 
  X 
  Zeiss 
  oc. 
  4, 
  

   obj. 
  D, 
  full 
  draw-tube. 
  

  

  Fig. 
  5. 
  Head 
  and 
  anterior 
  region 
  of 
  Chtetozone 
  carpenteri. 
  Enlarged. 
  

  

  Fig. 
  5 
  a. 
  Bristle 
  of 
  the 
  first 
  foot 
  of 
  the 
  foregoing. 
  x 
  Zeiss 
  oc. 
  2, 
  

   obj. 
  D, 
  full 
  draw-tube. 
  

  

  Fig. 
  5 
  b. 
  Tenth 
  foot 
  (dorsal 
  division) 
  of 
  Ch&tosone 
  carpenteri. 
  En- 
  

   larged. 
  

  

  