﻿[55] 
  

  

  DECAPODA 
  FEOM 
  ALBAT1JOSS 
  DKEDGLNGS. 
  

  

  659 
  

  

  This 
  species 
  is 
  closely 
  allied 
  to 
  B. 
  Payeri 
  G. 
  O. 
  Sars, 
  but 
  the 
  speci- 
  

   mens 
  differ 
  conspicuously 
  from 
  specimens 
  of 
  B. 
  Payeri 
  from 
  the 
  Faroe 
  

   Channel, 
  received 
  from 
  the 
  Bev. 
  Dr. 
  Norman, 
  in 
  the 
  size' 
  of 
  the 
  eyes 
  

   and 
  the 
  form 
  of 
  the 
  antennal 
  scales. 
  

  

  Female. 
  — 
  The 
  carapax 
  is 
  about 
  two-thirds 
  as 
  broad 
  as 
  its 
  length 
  

   along 
  the 
  dorsum, 
  and 
  the 
  front 
  about 
  a 
  sixth 
  as 
  broad 
  as 
  the 
  length 
  

   and 
  very 
  nearly 
  as 
  in 
  B. 
  Payeri, 
  but 
  the 
  lateral 
  teeth 
  are 
  a 
  little 
  more 
  

   prominent 
  than 
  in 
  that 
  species. 
  The 
  short 
  median 
  carina 
  on 
  thegastric 
  

   region 
  terminates 
  abruptly 
  in 
  a 
  small 
  tooth 
  anteriorly, 
  not 
  present 
  in 
  

   any 
  of 
  the 
  specimens 
  of 
  B. 
  Payeri. 
  The 
  eye-stalk 
  and 
  eye 
  are 
  about 
  a 
  

   fourth 
  as 
  long 
  as 
  the 
  dorsum 
  of 
  the 
  carapax, 
  and 
  the 
  diameter 
  of 
  the 
  

   black 
  eye 
  about 
  three-fifths 
  of 
  the 
  length 
  of 
  the 
  stalk 
  and 
  eye. 
  In 
  the 
  

   specimens 
  of 
  B. 
  Payeri 
  the 
  eyes 
  are 
  considerably 
  smaller, 
  about 
  a 
  fifth 
  

   as 
  long 
  as 
  the 
  carapax, 
  and 
  the 
  diameter 
  about 
  half 
  the 
  length 
  of 
  the 
  

   eye 
  and 
  stalk. 
  The 
  first 
  segment 
  of 
  the 
  peduncle 
  of 
  the 
  antennula 
  is 
  

   armed 
  with 
  a 
  very 
  slender 
  and 
  acute 
  lateral 
  spine, 
  which 
  reaches 
  nearly 
  

   as 
  far 
  forward 
  as 
  the 
  segment 
  itself. 
  The 
  antennal 
  scale 
  is 
  fully 
  as 
  long 
  

   as 
  the 
  dorsum 
  of 
  the 
  carapax 
  and 
  less 
  than 
  a 
  third 
  as 
  broad 
  as 
  long, 
  

   while 
  in 
  B. 
  Payeri 
  it 
  is 
  rather 
  shorter 
  and 
  considerably 
  broader. 
  The 
  

   perseopods 
  and 
  pleon 
  are 
  very 
  nearly 
  as 
  in 
  B. 
  Payeri. 
  

  

  The 
  eggs 
  in 
  the 
  alcoholic 
  specimens 
  are 
  about 
  1.8 
  by 
  ±A 
  mm 
  in 
  longer 
  

   and 
  shorter 
  diameter. 
  

  

  In 
  the 
  following 
  table 
  similar 
  measurements 
  of 
  this 
  species 
  and 
  a 
  

   specimen 
  of 
  B. 
  Payeri 
  are 
  given 
  for 
  comparison. 
  

  

  Measurements 
  in 
  millimeters 
  and 
  hundredths 
  of 
  length 
  of 
  carapax. 
  

  

  B. 
  gracilis. 
  

  

  B. 
  Payeri. 
  

  

  StatioD 
  

  

  Sex 
  

  

  Length 
  from 
  front 
  to 
  tip 
  of 
  telson. 
  

  

  Lengt 
  h 
  of 
  carapax 
  . 
  

  

  Breadth 
  of 
  carapax 
  

  

  Breadl 
  h 
  of 
  front 
  

  

  Length 
  of 
  eye-stalk 
  and 
  eye 
  

  

  Greatest 
  diameter 
  of 
  eye 
  

  

  Length 
  of 
  antennal 
  scale 
  , 
  

  

  Breadth 
  of 
  antennal 
  scale 
  

  

  Length 
  of 
  sixth 
  somite 
  of 
  pleon... 
  

   Height 
  of 
  sixl 
  h 
  somite 
  of 
  pleon 
  . 
  .. 
  

  

  Length 
  of 
  telson 
  

  

  Length 
  of 
  inner 
  lamella 
  of 
  uropod 
  

   Breadth 
  of 
  inner 
  lamella 
  of 
  uropod 
  

   Length 
  of 
  outer 
  lamella 
  of 
  uropod 
  

   Breadth 
  of 
  outer 
  lamella 
  of 
  uropod 
  

  

  2116 
  

  

  Per 
  

  

  Mm. 
  cent. 
  

   39. 
  0=464 
  

   8. 
  4 
  100 
  

   5.5 
  

   L4 
  

   2.0 
  

   1.3 
  

   8.5 
  

   2.8 
  

   (i. 
  1 
  

   2.3 
  

   7 
  5 
  

   5.6 
  

   1.8 
  

   7.0 
  

   2.4 
  

  

  65 
  

   17 
  

   24 
  

   15 
  

   101 
  

   35 
  

   73 
  

   27 
  

   80 
  

   67 
  

   21 
  

   83 
  

   29 
  

  

  Per 
  

  

  Mm. 
  cent. 
  

   50. 
  0=476 
  

  

  10. 
  5 
  

   6.7 
  

   1.6 
  

   2.0 
  

   1.0 
  

   9.6 
  

   4.3 
  

   8.0 
  

   3.6 
  

   9.0 
  

   7.3 
  

   2.4 
  

   8.8 
  

   3.5 
  

  

  100 
  

   64 
  

   15 
  

   19 
  

   10 
  

   92 
  

   41 
  

   76 
  

   34 
  

   86 
  

   70 
  

   23 
  

   84 
  

   33 
  

  

  Bythoearis 
  Payeri 
  and 
  the 
  following 
  species, 
  B. 
  nama, 
  differ 
  remarka- 
  

   bly 
  from 
  Hippolyte 
  and 
  the 
  allied 
  genera 
  in 
  the 
  reduced 
  number 
  'of 
  the 
  

   branchiae 
  and 
  epipods. 
  There 
  are 
  no 
  epipods 
  proper 
  at 
  the 
  bases 
  of 
  any 
  

  

  