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  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  [22] 
  

  

  seiice 
  is 
  confirmed 
  by 
  Miers's 
  diagnosis 
  of 
  the 
  genus. 
  The 
  preorbital 
  

   spines/though 
  prominent 
  in 
  A. 
  Agassizii, 
  crassa, 
  Tanneri, 
  and 
  hystri.r, 
  are 
  

   small 
  and 
  inconspicuous 
  in 
  Scyramathia 
  Carpenteri, 
  their 
  absence 
  would 
  

   apparently 
  change 
  the 
  character 
  of 
  the 
  orbits 
  very 
  little, 
  and, 
  as 
  Miers 
  

   has 
  said 
  in 
  another 
  place, 
  is 
  " 
  a 
  character 
  which 
  by 
  itself 
  cannot 
  be 
  con- 
  

   sidered 
  of 
  generic 
  importance." 
  It 
  is 
  still 
  quite 
  possible 
  that 
  A. 
  Rissoana 
  

   is 
  different 
  enough 
  to 
  be 
  separated 
  from 
  the 
  American 
  species, 
  in 
  which 
  

   case 
  they 
  should 
  all, 
  apparently, 
  be 
  referred 
  to 
  Scyramathia, 
  which, 
  as 
  

   Professor 
  Sars 
  remarks, 
  belongs 
  most 
  properly 
  to 
  the 
  Maiidae. 
  Miers, 
  

   however, 
  evidently 
  saw 
  the 
  resemblance 
  between 
  A. 
  Rissoana 
  and 
  the 
  

   Maiidse, 
  for 
  he 
  says 
  that 
  the 
  genus 
  Halimus, 
  which 
  he 
  places 
  next 
  to 
  

   Amathia, 
  " 
  establishes 
  a 
  transition 
  to 
  the 
  Maiidw.'' 
  1 
  Until 
  A. 
  Rissoana 
  

   is. 
  carefully 
  compared 
  with 
  the 
  other 
  species, 
  it 
  seems 
  best 
  to 
  retain 
  them 
  

   all 
  in 
  the 
  genus 
  Anamathia. 
  

  

  Though 
  Professor 
  Sars 
  is 
  "greatly 
  disposed 
  to 
  regard 
  the 
  two 
  forms 
  as 
  

   identical," 
  I 
  think 
  there 
  can 
  be 
  very 
  little 
  doubt 
  that 
  Stimpson's 
  Seyra 
  

   umbonata 
  is 
  at 
  least 
  specifically 
  distinct 
  from 
  Anamathia, 
  Carpenteri. 
  

   Stimpson 
  says 
  of 
  his 
  species 
  that 
  " 
  the 
  rostrum 
  is 
  rather 
  longer 
  than 
  

   the 
  interorbital 
  width 
  of 
  the 
  carapax," 
  while 
  in 
  A. 
  Carpenteri 
  the 
  rostrum 
  

   is 
  more 
  than 
  twice 
  as 
  long 
  as 
  the 
  interorbital 
  width 
  of 
  the 
  carapax. 
  

   Moreover, 
  Stimpson 
  compares 
  his 
  species 
  with 
  Scyra 
  acntifrons 
  Dana, 
  

   which 
  has 
  a 
  broad 
  lamellar 
  rostrum, 
  divided 
  only 
  at 
  the 
  tip, 
  and 
  very 
  

   unlike 
  the 
  long 
  and 
  spreading 
  rostral 
  horns 
  of 
  the 
  species 
  of 
  Anamathia, 
  

   and 
  he 
  nowhere 
  alludes 
  to 
  rostral 
  horns, 
  as 
  he 
  does 
  under 
  his 
  Amathia 
  

   modesta, 
  or 
  even 
  mentions 
  that 
  the 
  rostrum 
  is 
  divided 
  at 
  all. 
  It 
  is, 
  per- 
  

   haps, 
  useless 
  to 
  speculate 
  upon 
  the 
  affinities 
  of 
  Stimpson's 
  species 
  until 
  

   it 
  is 
  rediscovered, 
  but 
  I 
  am 
  confident 
  that 
  it 
  will 
  be 
  found 
  to 
  have 
  a 
  ros- 
  

   trum 
  very 
  different 
  from 
  that 
  of 
  Anamathia 
  Carpenteri. 
  

  

  Anamathia 
  Tanneri 
  Smith. 
  

  

  Amathia 
  Tanneri 
  Smith, 
  Proc. 
  National 
  Mus., 
  vi, 
  p. 
  4, 
  1883. 
  

   Anamathia 
  Tanneri 
  Smith, 
  Proc. 
  National 
  Mus., 
  vii, 
  p. 
  493, 
  1885. 
  

  

  (Plate 
  I, 
  Fig. 
  4.) 
  

  

  I 
  have 
  seen 
  only 
  the 
  type 
  specimens 
  taken 
  by 
  the 
  Fish 
  Hawk 
  in 
  1881. 
  

   The 
  figure 
  is 
  from 
  the 
  larger 
  of 
  these 
  specimens. 
  

  

  Hyas 
  coarctatus 
  Leach. 
  

  

  Specimens 
  examined. 
  

  

  