﻿656 
  EEPOKT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  [52] 
  

  

  tion, 
  and 
  toward 
  the 
  tip 
  there 
  is 
  in 
  addition 
  a 
  slight 
  median 
  carina. 
  

   The 
  carinas 
  of 
  the 
  carapax 
  have 
  nearly 
  the 
  same 
  arrangement 
  as 
  in 
  G. 
  

   sculptus. 
  The 
  tubercles 
  of 
  the 
  slightly 
  prominent 
  dorsal 
  carinas 
  are 
  all 
  

   very 
  low, 
  obtuse, 
  and 
  punctate, 
  and 
  the 
  space 
  between 
  the 
  carinae 
  un- 
  

   armed 
  or 
  armed 
  only 
  by 
  a 
  few 
  small 
  tubercles 
  in 
  front. 
  On 
  the 
  lateral 
  

   lobes 
  of 
  the 
  gastric 
  region 
  the 
  tubercles 
  are 
  all 
  low 
  and 
  more 
  or 
  less 
  

   obtuse, 
  except 
  the 
  anterior, 
  which 
  is 
  acute 
  and 
  much 
  more 
  prominent 
  

   than 
  the 
  others. 
  The 
  antennal 
  and 
  antero-lateral 
  spines 
  are 
  nearly 
  as 
  

   in 
  G. 
  sculptus. 
  The 
  lateral 
  carina 
  of 
  the 
  antennal 
  region 
  is 
  continuous 
  

   and 
  terminates 
  anteriorly 
  in 
  a 
  sharp 
  tooth, 
  back 
  of 
  which 
  the 
  edge 
  is 
  

   obtuse 
  and 
  punctate. 
  Back 
  of 
  the 
  cervical 
  suture 
  the 
  upper 
  lateral 
  

   carina 
  is 
  prominent 
  ; 
  the 
  tubercles 
  with 
  which 
  it 
  is 
  surmounted 
  are 
  all 
  

   obtuse 
  and 
  punctate. 
  The 
  middle 
  lateral 
  carina 
  is 
  continuous, 
  broad, 
  

   and 
  punctate, 
  and 
  the 
  lower 
  carina 
  is 
  very 
  low, 
  but 
  well 
  marked 
  by 
  

   being 
  punctate. 
  The 
  inferior 
  margin 
  of 
  the 
  carapax 
  is 
  carinated, 
  as 
  in 
  

   the 
  other 
  species. 
  

  

  The 
  eye-stalks 
  are 
  very 
  short, 
  and 
  the 
  eyes 
  themselves 
  relatively 
  about 
  

   as 
  broad 
  as 
  in 
  the 
  other 
  species, 
  and 
  in 
  the 
  alcoholic 
  specimen 
  are 
  dark 
  

   purplish 
  brown. 
  

  

  The 
  peduncles 
  of 
  the 
  antennulse 
  reach 
  to 
  the 
  tips 
  of 
  the 
  antennal 
  

   scales 
  in 
  the 
  female 
  and 
  a 
  little 
  beyond 
  in 
  the 
  male, 
  and 
  are 
  less 
  hairy 
  

   than 
  in 
  G. 
  sculptus. 
  The 
  inner 
  flagellum 
  is 
  very 
  slender, 
  regularly 
  

   tapered, 
  slightly 
  longer 
  than 
  the 
  outer, 
  about 
  as 
  long 
  as 
  the 
  carapax 
  

   excluding 
  the 
  rostrum, 
  in 
  the 
  male, 
  and 
  considerably 
  shorter 
  in 
  the 
  

   female, 
  but 
  in 
  other 
  respects 
  not 
  different 
  in 
  the 
  two 
  sexes. 
  The 
  proxi- 
  

   mal 
  half 
  of 
  the 
  outer 
  flagellum 
  is 
  very 
  broad 
  and 
  strongly 
  compressed 
  

   vertically 
  in 
  the 
  male, 
  and 
  tapers 
  suddenly 
  to 
  the 
  very 
  slender 
  termi- 
  

   nal 
  portion, 
  while 
  in 
  the 
  female 
  the 
  proximal 
  half, 
  though 
  compressed 
  

   and 
  expanded, 
  is 
  only 
  about 
  half 
  as 
  broad 
  as 
  in 
  the 
  male. 
  The 
  anten- 
  

   nal 
  scales 
  are 
  smaller 
  than 
  in 
  G. 
  sculptus, 
  being 
  only 
  about 
  three-sev- 
  

   enths 
  as 
  long 
  as 
  the 
  carapax, 
  excluding 
  the 
  rostrum, 
  ovate, 
  about 
  three- 
  

   fifths 
  as 
  broad 
  as 
  long, 
  and 
  have 
  a 
  very 
  indistinct 
  tooth 
  about 
  the 
  mid- 
  

   dle 
  of 
  the 
  outer 
  margin, 
  which 
  is 
  only 
  obscurely 
  ciliated 
  back 
  of 
  the 
  

   tooth. 
  

  

  The 
  second 
  gnathopods 
  and 
  first 
  peraeopods 
  are 
  almost 
  exactly 
  as 
  in 
  

   G. 
  sculptus. 
  The 
  second 
  peraeopods 
  are 
  alike 
  in 
  the 
  two 
  sexes 
  and 
  very 
  

   nearly 
  like 
  those 
  of 
  G. 
  sculptus, 
  but 
  a 
  little 
  longer, 
  reaching 
  slightly 
  by 
  

   the 
  tips 
  of 
  the 
  antennal 
  scales, 
  and 
  the 
  right 
  carpus 
  has 
  about 
  twenty-five 
  

   segments, 
  two 
  or 
  three 
  more 
  than 
  the 
  left, 
  which 
  is 
  very 
  slightly 
  shorter 
  

   than 
  the 
  right. 
  The 
  third 
  peraeopods 
  are 
  nearly 
  as 
  in 
  the 
  other 
  species, 
  

   reach 
  a 
  little 
  beyond 
  the 
  tips 
  of 
  the 
  antennal 
  scales, 
  and 
  their 
  dactyli 
  

   are 
  a 
  little 
  more 
  than 
  a 
  third 
  as 
  long 
  as 
  the 
  propodi 
  and 
  very 
  slender. 
  

   The 
  fourth 
  and 
  fifth 
  pairs 
  of 
  peraeopods 
  are 
  but 
  very 
  little 
  if 
  at 
  all 
  stouter 
  

   than 
  the 
  third; 
  the 
  fascicles 
  of 
  setae 
  at 
  the 
  tips 
  of 
  the 
  propodi 
  are 
  about 
  

   half 
  as 
  long 
  as 
  the 
  propodi 
  themselves, 
  and 
  the 
  propodi 
  are 
  about 
  as 
  long 
  

   as 
  in 
  the 
  third 
  pair, 
  strongly 
  compressed 
  as 
  in 
  G. 
  Agassizii, 
  but 
  slender 
  

   and 
  not 
  expanded 
  at 
  all 
  in 
  the 
  middle. 
  

  

  