﻿646 
  VROCEEDiyiGS 
  OF 
  THE 
  NATIONAL 
  MVSETJM. 
  Vol.xx. 
  

  

  are 
  truncate 
  at 
  the 
  tip, 
  the 
  outer 
  part 
  terminating 
  in 
  two 
  small 
  recurved 
  

   teeth, 
  the 
  inner 
  part 
  in 
  a 
  slender 
  spine 
  which 
  is 
  directed 
  outward. 
  

  

  Gum 
  Cave, 
  Citrus 
  County, 
  Florida 
  (Coll.U.S. 
  N.M.), 
  Two 
  females, 
  

   twelve 
  young' 
  (male. 
  Form 
  II; 
  female). 
  

  

  Lonnberg's 
  types 
  of 
  Gamharus 
  acherontis, 
  two 
  males, 
  50 
  and 
  55 
  mm. 
  

   long, 
  were 
  procured 
  in 
  sinking 
  a 
  well, 
  from 
  a 
  subterranean 
  rivulet 
  

   about 
  forty-two 
  feet 
  from 
  the 
  surface, 
  in 
  Orange 
  County, 
  Florida. 
  

   A(!Cording 
  to 
  Lonnberg's 
  description 
  and 
  figures, 
  the 
  chela 
  is 
  thicker 
  

   than 
  in 
  the 
  Citrus 
  County 
  examples 
  above 
  described, 
  the 
  telson 
  is 
  

   shorter, 
  the 
  abdominal 
  pleura^ 
  more 
  acuminate, 
  and 
  the 
  antenna! 
  scales 
  

   more 
  triangular 
  in 
  form. 
  Following 
  the 
  description 
  alone, 
  the 
  rostral 
  

   acumen 
  is 
  blunt 
  and 
  its 
  base 
  extends 
  back 
  into 
  the 
  rostral 
  groove 
  as 
  a 
  

   slight 
  ridge. 
  These 
  conditions 
  are 
  not 
  true 
  of 
  the 
  Citrus 
  County 
  speci- 
  

   mens, 
  neither 
  are 
  they 
  shown 
  in 
  Lonnberg's 
  figures 
  of 
  C. 
  acherontis. 
  

   The 
  only 
  adult 
  examples 
  in 
  the 
  Citrus 
  County 
  lot, 
  moreover, 
  are 
  

   females, 
  while 
  Liinnberg's 
  specimens 
  were 
  both 
  males. 
  I 
  am 
  therefore 
  

   inclined 
  to 
  believe 
  that 
  the 
  discrepancies 
  between 
  the 
  Swedish 
  author's 
  

   account 
  of 
  C. 
  acherontis 
  and 
  the 
  specimens 
  before 
  me 
  are 
  due 
  to 
  dif- 
  

   ferences 
  in 
  age 
  and 
  sex, 
  and 
  in 
  part 
  to 
  inaccuracy 
  of 
  description 
  and 
  

   delineation. 
  

  

  This 
  species, 
  the 
  fourth 
  blind 
  Gamharus 
  described 
  from 
  the 
  United 
  

   States, 
  is 
  very 
  distinct 
  from 
  any 
  of 
  the 
  others. 
  As 
  pointed 
  out 
  by 
  

   Lonnberg, 
  it 
  is 
  probably 
  descended 
  from 
  G. 
  clarkii. 
  It 
  is 
  noteworthy 
  

   that 
  in 
  a 
  specimen 
  of 
  G. 
  clarhii 
  collected 
  in 
  St. 
  Johns 
  River, 
  Florida, 
  

   the 
  areola, 
  although 
  narrow, 
  is 
  not 
  obliterated 
  in 
  the 
  middle. 
  In 
  this 
  

   respect 
  this 
  specimen 
  agrees 
  with 
  G. 
  acherontis 
  as 
  well 
  as 
  with 
  Texan 
  

   specimens 
  of 
  G. 
  clarlii, 
  and 
  differs 
  from 
  the 
  form 
  of 
  G. 
  elarkii 
  found 
  in 
  

   Alabama, 
  Mississippi, 
  and 
  Louisiana. 
  That 
  the 
  maximum 
  age 
  of 
  the 
  

   caverns 
  in 
  which 
  G. 
  acherontis 
  lives 
  is 
  probably 
  Post-pliocene 
  has 
  been 
  

   shown 
  by 
  Lonnberg.^ 
  

  

  CAMBARUS 
  PUBESCENS 
  Faxon. 
  

  

  Buckhead 
  Creek, 
  Milieu, 
  Burke 
  County, 
  Georgia 
  (Coll.U.S.N.M.). 
  

  

  CAMBARUS 
  VERSUTUS 
  Hagen. 
  

  

  Pollard 
  (Escambia 
  County), 
  Greenville 
  (Butler 
  County), 
  and 
  Calera 
  

   (Shelby 
  County), 
  Alabama 
  (Coll. 
  U.S.N.M.). 
  All 
  of 
  these 
  specimens 
  

   have 
  a 
  carinated 
  rostrum.^ 
  

  

  CAMBARUS 
  ALLENI 
  Faxon. 
  

  

  This 
  species 
  is 
  recorded 
  by 
  Lonnberg'' 
  from 
  Apopka 
  (Orange 
  County), 
  

   Arcadia 
  (DeSoto 
  County), 
  and 
  from 
  Hillsboro 
  County, 
  Florida. 
  

  

  ' 
  Bihang 
  till 
  K. 
  Svenska 
  Vet.-Akad. 
  Hand]., 
  XX, 
  Pt. 
  4, 
  pp. 
  8, 
  1>, 
  1894. 
  

   2Rev. 
  Astacidii', 
  p. 
  31. 
  and 
  Proc. 
  U. 
  8. 
  Nat. 
  Altis., 
  XII, 
  p. 
  619. 
  

   -Bihang 
  till 
  K. 
  Svenska 
  Vct.-Akad. 
  Ilaudl., 
  X\, 
  Pt. 
  4, 
  p. 
  1, 
  ISM. 
  

  

  