﻿446 
  Rev. 
  A. 
  M. 
  Norman's 
  Notes 
  on 
  British 
  Amplripoda. 
  

  

  seen. 
  I 
  have 
  thought 
  it 
  only 
  right 
  to 
  draw 
  attention 
  to 
  these 
  

   points, 
  since 
  I 
  am 
  compelled 
  frequently 
  to 
  dissent 
  from 
  the 
  

   conclusions 
  of 
  Messrs. 
  Bate 
  and 
  Westwood 
  in 
  these 
  notes. 
  

  

  Genus 
  Megaltjropus, 
  n. 
  g. 
  

   (/jttyas, 
  ovpd, 
  irovs= 
  having 
  large 
  uropods.) 
  

  

  Head 
  produced 
  forwards 
  between 
  the 
  bases 
  of 
  the 
  anten- 
  

   nules 
  and 
  antennae 
  into 
  a 
  conspicuous 
  lobe 
  in 
  which 
  the 
  

   large 
  round 
  eye 
  is 
  situated. 
  Antennules 
  with 
  short 
  secondary 
  

   flagellum, 
  much 
  shorter 
  than 
  the 
  antenna?. 
  Gnathopods 
  not 
  

   large, 
  subehelate, 
  second 
  pair 
  rather 
  larger 
  than 
  the 
  first. 
  

   Last 
  uropods 
  with 
  the 
  branches 
  in 
  the 
  form 
  of 
  large, 
  mem- 
  

   branaceous, 
  leaf-like 
  lamina?. 
  Telson 
  squamiform, 
  cleft 
  to 
  

   the 
  base. 
  

  

  The 
  most 
  remarkable 
  characters 
  in 
  this 
  genus 
  are 
  the 
  eye, 
  

   which 
  is 
  situated 
  on 
  the 
  greatly 
  projected 
  lobe, 
  and 
  the 
  ex- 
  

   panded 
  foliaceous 
  branches 
  of 
  the 
  last 
  uropods. 
  In 
  the 
  former 
  

   particular 
  we 
  are 
  reminded 
  of 
  the 
  genus 
  Photis 
  ( 
  = 
  Efscladus, 
  

   B. 
  & 
  W.), 
  in 
  the 
  latter 
  of 
  the 
  genus 
  Elasmopus 
  (Boeck), 
  near 
  

   to 
  which 
  last 
  genus 
  the 
  present 
  should, 
  I 
  think, 
  take 
  its 
  place. 
  

   In 
  Elasmopus 
  the 
  eye 
  is 
  situated 
  on 
  the 
  side 
  of 
  the 
  head, 
  the 
  

   antennules 
  are 
  longer 
  than 
  the 
  antennae 
  instead 
  of 
  the 
  reverse, 
  

   and 
  the 
  perseopods 
  are 
  constructed 
  in 
  a 
  very 
  different 
  manner, 
  

   the 
  joints 
  being 
  widely 
  expanded 
  and 
  the 
  limbs 
  robust. 
  

  

  Megaluropus 
  agilis, 
  n. 
  sp. 
  (PI. 
  XVIII. 
  figs. 
  1-10.) 
  

  

  Head 
  (fig. 
  1) 
  with 
  a 
  rostrate 
  acute 
  process 
  above, 
  which 
  is 
  

   extended 
  about 
  half 
  the 
  length 
  of 
  the 
  first 
  joint 
  of 
  the 
  anten- 
  

   nules 
  ; 
  on 
  the 
  side 
  between 
  the 
  bases 
  of 
  the 
  antennules 
  and 
  

   antenna? 
  there 
  is 
  projected 
  a 
  large 
  lobe, 
  which 
  is 
  pointed 
  at 
  

   the 
  end 
  and 
  reaches 
  one 
  third 
  of 
  the 
  length 
  of 
  the 
  second 
  

   joint 
  of 
  the 
  peduncle 
  of 
  the 
  antennules 
  ; 
  this 
  lobe, 
  with 
  the 
  

   exception 
  of 
  the 
  point 
  at 
  its 
  extremity, 
  is 
  filled 
  with 
  an 
  eye 
  

   composed 
  of 
  large 
  conspicuous 
  lenses. 
  Antennules 
  slender, 
  

   first 
  two 
  joints 
  subequal 
  in 
  length, 
  third 
  about 
  half 
  that 
  

   length 
  ; 
  flagellum 
  shorter 
  than 
  peduncle, 
  composed 
  of 
  six 
  or 
  

   seven 
  articulations, 
  secondary 
  appendage 
  minute, 
  consisting 
  

   of 
  two 
  articulations. 
  Antenna? 
  having 
  the 
  two 
  distal 
  joints 
  

   of 
  the 
  peduncle 
  subequal, 
  very 
  long 
  and 
  slender 
  and 
  almost 
  

   naked 
  ; 
  flagellum 
  eight-jointed. 
  First 
  gnathopods 
  (fig. 
  2) 
  

   having 
  the 
  wrist 
  ovate, 
  as 
  long 
  as 
  and 
  broader 
  than 
  the 
  ovate 
  

   hand, 
  which 
  latter 
  tapers 
  towards 
  the 
  extremity, 
  the 
  whole 
  of 
  

   which 
  is 
  occupied 
  by 
  the 
  attachment 
  of 
  the 
  strong, 
  well-curved 
  

   nail 
  ; 
  palm 
  continuous 
  with 
  the 
  front 
  margin 
  for 
  nearly 
  two 
  

  

  