﻿458 
  Rev. 
  A. 
  M. 
  Norman's 
  Notes 
  on 
  British 
  Amphipoda. 
  

  

  breadth 
  at 
  base, 
  almost 
  naked; 
  second 
  nearly 
  twice 
  as 
  long 
  

   as 
  the 
  first 
  and 
  longer 
  than 
  combined 
  length 
  of 
  third 
  joint 
  and 
  

   the 
  flagellum, 
  with 
  a 
  row 
  of 
  long 
  setae 
  on 
  the 
  edge 
  ; 
  third 
  

   joint 
  shorter 
  than 
  the 
  first 
  ; 
  flagellum 
  of 
  about 
  eleven 
  articu- 
  

   lations. 
  Antennas 
  longer 
  than 
  the 
  antennules, 
  but 
  the 
  pe- 
  

   duncle 
  much 
  shorter, 
  its 
  extremity 
  not 
  nearly 
  reaching 
  the 
  

   end 
  of 
  the 
  second 
  joint 
  of 
  the 
  antennules 
  ; 
  fourth 
  and 
  fifth 
  

   joints 
  subequal. 
  According 
  to 
  Goe's's 
  figure 
  of 
  the 
  male, 
  in 
  

   that 
  sex 
  the 
  peduncle 
  of 
  the 
  antennules 
  is 
  very 
  short, 
  especially 
  

   the 
  second 
  and 
  third 
  joint, 
  and 
  it 
  does 
  not 
  reach 
  the 
  end 
  of 
  the 
  

   penultimate 
  joint 
  of 
  the 
  antennas, 
  while 
  the 
  flagellum 
  is 
  much 
  

   longer 
  (about 
  twenty 
  articulations) 
  ; 
  and 
  the 
  flagellum 
  of 
  the 
  

   antennas 
  is, 
  as 
  usual 
  in 
  males, 
  very 
  long. 
  The 
  gnathopods 
  are 
  

   very 
  similar 
  in 
  structure 
  to 
  each 
  other, 
  but 
  the 
  second 
  are 
  

   longer; 
  the 
  wrist 
  is 
  produced 
  downwards 
  and 
  forwards 
  into 
  a 
  

   calx, 
  which 
  reaches 
  the 
  commencement 
  of 
  the 
  palm, 
  and 
  is 
  

   rounded 
  at 
  the 
  extremity, 
  rather 
  more 
  broadly 
  in 
  the 
  first 
  

   pair 
  than 
  in 
  the 
  second; 
  hand 
  ovate, 
  palm 
  continuous 
  with 
  

   the 
  front 
  margin 
  and 
  about 
  half 
  its 
  length, 
  finger 
  gently 
  

   curved. 
  Peneopods 
  : 
  in 
  the 
  first 
  pair 
  the 
  thigh 
  is 
  narrow 
  

   above, 
  rather 
  widening 
  below, 
  much 
  curved 
  ; 
  the 
  meros 
  wide, 
  

   outspread 
  on 
  the 
  back, 
  where 
  it 
  is 
  furnished 
  along 
  the 
  edge 
  

   with 
  long 
  setae, 
  as 
  long 
  and 
  as 
  broad 
  as 
  the 
  thigh 
  ; 
  wrist 
  and 
  

   hand 
  subequal 
  in 
  length, 
  each 
  hardly 
  half 
  the 
  length 
  of 
  meros, 
  

   the 
  former 
  densely 
  setose 
  on 
  the 
  lower 
  margin, 
  and 
  the 
  latter 
  

   with 
  a 
  group 
  of 
  long 
  setae 
  at 
  the 
  distal 
  termination 
  of 
  the 
  

   dorsal 
  margin 
  ; 
  finger 
  foliaceous, 
  broadly 
  lanceolate, 
  not 
  quite 
  

   so 
  long 
  as 
  the 
  hand 
  ; 
  second 
  perseopods 
  with 
  finger 
  of 
  similar 
  

   character 
  to 
  that 
  of 
  first 
  but 
  longer 
  ; 
  third 
  and 
  fourth 
  perseo- 
  

   pods 
  much 
  shorter 
  and 
  not 
  more 
  than 
  half 
  as 
  long 
  as 
  last 
  

   pair, 
  the 
  third 
  having 
  the 
  thigh 
  subovate, 
  expanded 
  and 
  well 
  

   arcuated 
  dorsally, 
  and 
  edged 
  with 
  pectinately 
  arranged 
  long- 
  

   setae, 
  some 
  of 
  those 
  of 
  the 
  upper 
  margin 
  being 
  beautifully 
  

   plumose 
  ; 
  wrist 
  and 
  hand 
  subequal 
  to 
  each 
  other 
  and 
  their 
  

   combined 
  length 
  about 
  equal 
  to 
  the 
  meros, 
  the 
  former 
  densely 
  

   setose 
  below 
  and 
  apically 
  setose 
  dorsally, 
  setae 
  long 
  ; 
  hand 
  

   setose 
  above, 
  naked 
  below, 
  finger 
  flattened, 
  membranaceous, 
  

   knife-like, 
  and 
  as 
  long 
  as 
  the 
  hand 
  ; 
  fourth 
  peraeopods 
  very 
  

   similar 
  to 
  the 
  third, 
  but 
  the 
  thigh 
  very 
  broad, 
  with 
  numerous 
  

   long 
  plumose 
  setae 
  down 
  the 
  centre, 
  but 
  no 
  plumose 
  setae 
  on 
  

   the 
  meros. 
  Last 
  peraeopods 
  with 
  thigh 
  and 
  meros 
  subequal, 
  

   the 
  thigh 
  elongated-pyriform, 
  the 
  carpus 
  rather 
  shorter 
  ; 
  the 
  

   propodos 
  is 
  the 
  longest 
  joint 
  and 
  the 
  finger 
  is 
  unguiform, 
  acute, 
  

   and 
  of 
  moderate 
  length. 
  Telson 
  having 
  the 
  length 
  scarcely 
  

   exceeding 
  the 
  breadth, 
  with 
  arcuate 
  sides 
  and 
  the 
  extremity 
  

  

  