﻿Gatty 
  Marine 
  Laboratory 
  , 
  St. 
  Andrews. 
  87 
  

  

  ratliei' 
  long 
  fimbrise^ 
  witli 
  a 
  broad 
  base 
  and 
  a 
  tapered 
  tip, 
  the 
  

   latter, 
  however, 
  not 
  being 
  acute 
  ; 
  and 
  the 
  collar 
  runs 
  ventro- 
  

   laterally 
  almost 
  to 
  the 
  base 
  of 
  the 
  anterior 
  cirrus 
  or 
  tentacle, 
  

   after 
  the 
  manner 
  of 
  Lagis 
  koreni. 
  The 
  cirrus 
  is 
  of 
  average 
  

   lengthy 
  and 
  is 
  tapered 
  from 
  base 
  to 
  apex. 
  From 
  its 
  base 
  a 
  

   ridge 
  passes 
  obliquely 
  backward 
  and 
  inward 
  on 
  each 
  side 
  

   to 
  the 
  mouth. 
  The 
  great 
  length 
  of 
  the 
  rim 
  of 
  the 
  dorsal 
  

   scabrous 
  plate 
  circumscribes 
  the 
  area 
  of 
  the 
  veil, 
  which 
  is 
  

   the 
  smallest 
  yet 
  observed 
  ; 
  but 
  its 
  disposition 
  is 
  similar, 
  for 
  

   it 
  has 
  a 
  slight 
  ventral 
  fold 
  on 
  each 
  side 
  to 
  aid 
  in 
  guarding 
  the 
  

   tentacles. 
  The 
  anterior 
  or 
  free 
  edge 
  is 
  fringed 
  with 
  com- 
  

   paratively 
  long 
  subulate 
  fimbrise. 
  The 
  tentacles 
  are 
  perhaps 
  

   less 
  numerous 
  than 
  in 
  allied 
  forms, 
  but 
  their 
  structure 
  i.s 
  the 
  

   same, 
  the 
  distal 
  ends 
  being 
  often 
  flattened 
  and 
  with 
  a 
  median 
  

   groove 
  joining 
  that 
  proceeding 
  along 
  the 
  column. 
  

  

  The 
  folds 
  at 
  the 
  sides 
  of 
  and 
  behind 
  the 
  mouth 
  in 
  the 
  

   main 
  agree 
  with 
  those 
  of 
  other 
  species. 
  

  

  The 
  second 
  cirrus 
  or 
  tentacle 
  arises 
  on 
  the 
  dorsal 
  edge 
  of 
  

   a 
  glandular 
  ridge, 
  which 
  ventralwards 
  presents 
  two 
  divisions, 
  

   viz. 
  an 
  outer 
  transversely 
  elongated 
  rounded 
  eminence, 
  and 
  

   a 
  larger 
  inner 
  ridge 
  which 
  passes 
  with 
  slight 
  obliquity 
  to 
  a 
  

   median 
  division. 
  In 
  front 
  of 
  this 
  prominent 
  ridge 
  are 
  two 
  

   or 
  three 
  minor 
  ones, 
  the 
  grooves 
  of 
  which 
  converge 
  toward 
  

   the 
  mouth. 
  From 
  the 
  dorsal 
  edge 
  of 
  the 
  cirrus 
  a 
  small 
  

   ridge 
  runs 
  dorsally, 
  but 
  soon 
  disappears 
  behind 
  the 
  fimbriated 
  

   rim 
  of 
  the 
  scabrous 
  region. 
  

  

  The 
  branchiae 
  occupy 
  a 
  similar 
  position 
  to 
  those 
  of 
  Lagis 
  

   koreni, 
  but 
  are 
  specially 
  modified, 
  in 
  so 
  far 
  as 
  the 
  lamellae 
  of 
  

   the 
  first 
  branchia 
  are 
  proportionally 
  larger 
  — 
  both 
  broader 
  

   and 
  longer 
  — 
  and 
  the 
  basal 
  axis 
  to 
  which 
  they 
  are 
  attached 
  is 
  

   shorter. 
  Thus, 
  the 
  apparatus 
  is 
  more 
  fan-shaped 
  and 
  less 
  

   like 
  the 
  scorpioidal 
  cyme. 
  As 
  in 
  Lagis, 
  the 
  larger 
  lamellae 
  

   are 
  internal, 
  and 
  they 
  gradually 
  diminish 
  to 
  the 
  small 
  ex- 
  

   ternal 
  end. 
  The 
  second 
  branchia 
  is 
  considerably 
  less 
  in 
  all 
  

   its 
  parts, 
  but 
  it 
  has 
  the 
  same 
  abbreviation 
  of 
  the 
  basal 
  axis 
  

   or 
  stem. 
  

  

  The 
  first 
  branchia 
  would 
  appear 
  to 
  belong 
  to 
  the 
  segment 
  

   behind 
  the 
  second 
  long 
  cirrus, 
  which 
  sends 
  a 
  prominent 
  

   glandular 
  ridge 
  to 
  the 
  mid-ventral 
  line. 
  The 
  second 
  pertains 
  

   to 
  the 
  ridge 
  immediately 
  behind, 
  which 
  also 
  passes 
  to 
  

   the 
  mid-ventral 
  line, 
  where, 
  as 
  in 
  the 
  previous 
  form, 
  a 
  

   separate 
  shield 
  occurs. 
  It 
  is 
  further 
  distinguished 
  by 
  a 
  

   considerable 
  flattened 
  glandular 
  lobe 
  which 
  immediately 
  

   follows 
  the 
  branchia, 
  and 
  which 
  would 
  apparently 
  act 
  as 
  a 
  

   guard 
  to 
  the 
  first 
  branchia. 
  

  

  