﻿108 
  Trof. 
  M^ntosli's 
  Notes 
  from 
  the 
  

  

  border 
  is 
  tliree-lobed, 
  as 
  in 
  M. 
  elisabethce. 
  The 
  hooks 
  have 
  

   four 
  teeth. 
  No 
  mention 
  is 
  made 
  of 
  the 
  two 
  dorsal 
  post- 
  

   brancliial 
  hooks, 
  and 
  though 
  1<\t,uvc1 
  subsequently 
  alludes 
  to 
  

   them 
  as 
  the 
  homologues 
  of 
  the 
  palate 
  and 
  transformed 
  dorsal 
  

   bristles, 
  there 
  is 
  nothing 
  distinctive 
  in 
  either 
  figure 
  or 
  

   description. 
  The 
  forms 
  appear 
  to 
  differ. 
  

  

  The 
  eighth 
  species 
  is 
  Melinna 
  adriatica, 
  Marenzeller, 
  a 
  

   southern 
  form 
  from 
  Plymouth 
  (Dr. 
  Allen) 
  and 
  Torquay 
  

   (Major 
  Elwes). 
  In 
  general 
  aspect 
  this 
  form 
  approaches 
  

   Melinna 
  crista 
  fa, 
  though 
  it 
  differs 
  in 
  the 
  appearance 
  of 
  the 
  

   branchiae 
  and 
  the 
  obscurity 
  of 
  the 
  branchial 
  hooks. 
  

  

  The 
  snout 
  bears 
  a 
  series 
  of 
  smooth 
  tentacles, 
  twelve 
  in 
  

   number, 
  the 
  shorter 
  forms 
  being 
  inferior. 
  They 
  occur 
  on 
  

   the 
  dorsal 
  base 
  of 
  a 
  funnel-shaped 
  process, 
  apparently 
  the 
  

   homologue 
  of 
  the 
  cephalic 
  plate 
  of 
  the 
  Terebellids, 
  which 
  

   leads 
  to 
  the 
  mouth. 
  In 
  his 
  account 
  of 
  the 
  species, 
  Maren- 
  

   zeller 
  mentions 
  only 
  four 
  tentacles, 
  but 
  they 
  are 
  easily 
  

   removed 
  in 
  preparations. 
  The 
  shape 
  of 
  the 
  anterior 
  region 
  

   of 
  the 
  body 
  agrees 
  with 
  that 
  of 
  the 
  typical 
  forms, 
  three 
  

   bristle-tufts 
  being 
  borne 
  by 
  the 
  oblique 
  anterior 
  part. 
  The 
  

   ventral 
  collar 
  behind 
  the 
  snout 
  is 
  prominent 
  and 
  smooth, 
  

   the 
  angle 
  in 
  front 
  of 
  the 
  first 
  bristle-bundle 
  being 
  con- 
  

   spicuous 
  in 
  a 
  ventral 
  view. 
  Posteriorly 
  the 
  body 
  terminates 
  

   in 
  an 
  anus 
  with 
  a 
  somewhat 
  dilated 
  rim. 
  

  

  The 
  branchiae 
  resemble 
  in 
  general 
  aspect 
  those 
  of 
  M. 
  cris- 
  

   tata, 
  though 
  distinguished 
  by 
  their 
  transverse 
  bars 
  and 
  

   arrangement, 
  since 
  the 
  four 
  branchiae 
  on 
  each 
  side 
  arise 
  from 
  

   a 
  curved 
  base, 
  and 
  are 
  all 
  visible 
  from 
  the 
  rear. 
  The 
  

   branchial 
  hooks 
  are 
  minute 
  and 
  readily 
  escape 
  detection, 
  

   and 
  thus 
  are 
  in 
  contrast 
  with 
  the 
  two 
  forms 
  most 
  abundant 
  

   in 
  the 
  north. 
  The 
  shaft 
  is 
  broad 
  and 
  short, 
  striated, 
  and 
  

   the 
  sharp 
  hook 
  at 
  the 
  tip 
  leaves 
  the 
  neck 
  at 
  more 
  than 
  a 
  

   right 
  angle, 
  the 
  whole 
  being 
  similar 
  to 
  that 
  of 
  Melinna 
  

   maculata, 
  Webster, 
  which 
  approaches 
  Marenzeller's 
  form. 
  

  

  Behind 
  the 
  foregoing 
  region, 
  at 
  the 
  fourth 
  bristled 
  seg- 
  

   ment, 
  is 
  the 
  dorsal 
  collar, 
  which 
  is 
  somewhat 
  narrower 
  and 
  

   less 
  distinctly 
  denticulated 
  than 
  in 
  the 
  two 
  forms 
  previously 
  

   mentioned, 
  the 
  papilla? 
  having 
  a 
  tendency 
  to 
  fuse 
  with 
  each 
  

   other, 
  and 
  thus 
  lose 
  the 
  feature 
  so 
  characteristic 
  of 
  J^. 
  cristata. 
  

   There 
  are 
  usually 
  four 
  to 
  eight 
  rounded 
  fimbriae. 
  

  

  The 
  tip 
  of 
  the 
  foot 
  is 
  more 
  distinctly 
  differentiated 
  than 
  

   in 
  M. 
  cristata, 
  as 
  a 
  bluntly 
  conical 
  process 
  marked 
  off 
  from 
  

   the 
  rest 
  of 
  the 
  foot 
  by 
  a 
  shoulder. 
  Moreover, 
  the 
  bristles 
  

   are 
  proportionally 
  larger 
  and 
  more 
  deeply 
  tinted 
  yellow 
  by 
  

   transmitted 
  light. 
  The 
  longer 
  forms 
  have 
  nearly 
  straight 
  

   shafts 
  and 
  finely 
  tapered 
  tips 
  with 
  just 
  a 
  trace 
  of 
  a 
  bend^ 
  

  

  