﻿450 
  Rev. 
  A. 
  M. 
  Norman's 
  Notes 
  on 
  British 
  Ampkipoda. 
  

  

  1887, 
  p. 
  108, 
  pi. 
  iv. 
  fig. 
  5) 
  has 
  recently 
  described 
  a 
  species 
  

   from 
  Greenland, 
  M. 
  crassirostris 
  , 
  which 
  has 
  similar 
  small 
  

   nails 
  to 
  M. 
  carinatus 
  and 
  chiefly 
  seems 
  to 
  differ 
  from 
  that 
  

   species 
  in 
  the 
  fact 
  that 
  the 
  basal 
  joint 
  of 
  the 
  last 
  perteopods 
  is 
  

   more 
  dilated. 
  Is 
  it 
  really 
  distinct? 
  

  

  2. 
  Monoculodes 
  subnudus, 
  n. 
  sp. 
  

   (PI. 
  XVIII. 
  fig. 
  11, 
  and 
  PI. 
  XIX. 
  figs. 
  6-10.) 
  

  

  Rostrum 
  (fig. 
  6) 
  well 
  developed, 
  arcuate, 
  apex 
  acute, 
  bent 
  

   downwards 
  and 
  extending 
  considerably 
  beyond 
  first 
  joint 
  of 
  

   antennules. 
  Eye 
  large, 
  occupying 
  the 
  basal 
  portion 
  of 
  ros- 
  

   trum, 
  not 
  prominent. 
  Antennules 
  with 
  basal 
  joint 
  furnished 
  

   with 
  plumed 
  seta? 
  and 
  spines 
  ; 
  second 
  joint 
  equal 
  in 
  length 
  to 
  

   first, 
  third 
  half 
  the 
  length 
  of 
  second 
  ; 
  flagellum 
  of 
  11-14 
  long- 
  

   joints. 
  Antennas 
  having 
  fourth 
  and 
  fifth 
  joints 
  subequal. 
  

   First 
  gnathopods 
  (fig. 
  7) 
  having 
  the 
  thigh 
  long 
  ; 
  calx 
  of 
  car- 
  

   pus 
  elongated 
  ovate, 
  divergent, 
  reaching 
  commencement 
  of 
  

   palm 
  ; 
  hand 
  narrow 
  at 
  the 
  base 
  and 
  expanding 
  distally, 
  

   arcuate, 
  arched* 
  on 
  the 
  back, 
  distinctly 
  concave 
  in 
  front, 
  

   widest 
  at 
  the 
  commencement 
  of 
  the 
  palm 
  ; 
  palm 
  scarcely 
  

   occupying 
  one 
  half 
  the 
  length 
  of 
  the 
  hand. 
  Second 
  gnatho- 
  

   pods 
  (fig. 
  8) 
  in 
  general 
  form 
  as 
  in 
  M. 
  borealis, 
  but 
  having 
  the 
  

   hand 
  much 
  narrower 
  in 
  proportion 
  to 
  its 
  length, 
  length 
  about 
  

   equal 
  to 
  five 
  times 
  the 
  breadth, 
  palm 
  oblique, 
  occupying 
  some- 
  

   what 
  less 
  than 
  one 
  third 
  of 
  length 
  ; 
  calx 
  of 
  wrist 
  linear, 
  some- 
  

   what 
  divergent, 
  reaching 
  commencement 
  of 
  palm. 
  First 
  and 
  

   second 
  perseopods 
  (PL 
  XVIII. 
  fig. 
  11) 
  with 
  length 
  of 
  joints 
  

   in 
  the 
  following 
  order 
  : 
  — 
  thigh, 
  meros, 
  hand, 
  wrist, 
  nail, 
  

   ischium 
  ; 
  sparingly 
  ciliated 
  except 
  wrist 
  ; 
  thigh 
  linear, 
  five 
  

   times 
  as 
  long 
  as 
  broad, 
  as 
  usual 
  with 
  stiff 
  seta? 
  on 
  parts 
  of 
  

   the 
  margin, 
  and 
  a 
  few 
  plumose 
  seta? 
  on 
  the 
  face 
  ; 
  meros 
  nearly 
  

   linear, 
  not 
  lobed 
  behind, 
  upper 
  margin 
  naked, 
  except 
  a 
  small 
  

   bunch 
  of 
  (6-8) 
  setffi 
  at 
  distal 
  extremity 
  ; 
  wrist 
  densely 
  ciliated 
  

   in 
  front 
  and 
  produced 
  there 
  downwards 
  into 
  a 
  little 
  lobe; 
  nail 
  well 
  

   developed, 
  slightly 
  curved, 
  equal 
  in 
  length 
  to 
  two 
  thirds 
  of 
  

   the 
  linear 
  hand. 
  Third 
  and 
  fourth 
  pereeopods 
  (fig. 
  9) 
  with 
  

   thigh, 
  metacarpus, 
  and 
  hand 
  subequal 
  in 
  length, 
  wiist 
  rather 
  

   shorter, 
  nail 
  well 
  developed, 
  nearly 
  straight, 
  more 
  than 
  half 
  

   the 
  length 
  of 
  long 
  linear 
  hand 
  ; 
  thigh 
  ovate, 
  flattened 
  into 
  a 
  

   thin 
  plate 
  behind 
  and 
  slightly 
  so 
  on 
  edge 
  in 
  front, 
  girt 
  with 
  

   stiff 
  simple 
  setse 
  and 
  numerous 
  plumose 
  setas 
  on 
  face 
  ; 
  meta- 
  

  

  * 
  I 
  regard 
  all 
  the 
  limbs 
  of 
  the 
  body 
  (whether 
  directed 
  forwards 
  or 
  

   backwards) 
  as 
  I 
  do 
  a 
  human 
  baud 
  ; 
  that 
  is, 
  the 
  back 
  or 
  upper 
  side 
  is 
  that 
  

   away 
  from 
  the 
  bend 
  of 
  the 
  limb, 
  the 
  front 
  or 
  lower 
  side 
  that 
  which 
  is 
  

   within 
  thi 
  j 
  bend 
  of 
  the 
  mettrBer. 
  

  

  