﻿K0.1136. 
  OBSERFATIOXS 
  OX 
  THE 
  ASTACIDJi— 
  FAXON. 
  G5i 
  

  

  GROUP 
  IV. 
  (Typo, 
  Asiacus 
  affinis 
  Say.) 
  

  

  Third 
  segment 
  of 
  third 
  pair 
  of 
  legs 
  of 
  male 
  hooked. 
  First 
  abdomiual 
  

   appendages 
  of 
  male 
  bifid, 
  terminating 
  in 
  two 
  stylilbrm 
  branches, 
  which 
  

   are 
  straight 
  or 
  lightly 
  recurved. 
  

  

  CAMfiARUS 
  LANCIFER 
  Hagen. 
  

  

  Camharus 
  lancifer 
  Hagen, 
  Monogr. 
  N. 
  A. 
  Astacida^, 
  p. 
  59, 
  pi. 
  i, 
  fios. 
  8G, 
  87; 
  pi. 
  

  

  Ill, 
  fig. 
  159, 
  1870 
  (male, 
  Form 
  I). 
  

   Camharus 
  faxoiiil 
  Meek, 
  Amer. 
  Nat., 
  XXVIII, 
  p. 
  1042, 
  figs. 
  1-4, 
  1894 
  (malo, 
  

  

  Form 
  II). 
  

  

  In 
  1891 
  Mr. 
  W. 
  P. 
  Hay 
  sent 
  me 
  a 
  female 
  specimen 
  of 
  C. 
  lancifer 
  col- 
  

   lected 
  at 
  Vicksburg, 
  Mississippi. 
  Up 
  to 
  that 
  time 
  Doctor 
  Hagen's 
  

   type 
  specimen 
  had 
  remained 
  unique. 
  Mr. 
  Hay's 
  specimen 
  differed 
  from 
  

   the 
  type 
  in 
  having 
  a 
  median 
  spine 
  on 
  the 
  inner 
  side 
  of 
  the 
  carpus 
  of 
  

   the 
  chelipeds. 
  In 
  the 
  "'American 
  jSlaturalist 
  " 
  for 
  December, 
  1894, 
  Pro- 
  

   fessor 
  S. 
  E. 
  Meek 
  described 
  and 
  figured 
  the 
  second 
  form 
  of 
  the 
  male 
  

   under 
  the 
  name 
  of 
  Camharus 
  fa.mnii 
  . 
  Professor 
  Meek's 
  specimens 
  were 
  

   taken 
  in 
  Ht. 
  Francis 
  Eiver 
  at 
  Greenway 
  and 
  Big 
  Bay, 
  Arkansas. 
  

   Seven 
  (four 
  males, 
  Form 
  II; 
  three 
  females) 
  have 
  been 
  presented 
  to 
  the 
  

   Museum 
  of 
  Comparative 
  Zoology 
  (ISTo. 
  42.20). 
  In 
  the 
  second 
  form 
  of 
  

   the 
  male 
  the 
  tips 
  of 
  the 
  first 
  pair 
  of 
  abdominal 
  appendages 
  are 
  not 
  

   horny, 
  as 
  in 
  the 
  first 
  form; 
  the 
  inner 
  and 
  outer 
  branches 
  are 
  of 
  about 
  

   ccjUrtl 
  length, 
  the 
  inner 
  tapering 
  to 
  a 
  rather 
  sharp, 
  straight 
  point, 
  the 
  

   outer 
  blunt 
  and 
  rounded. 
  These 
  appendages 
  are 
  cleft 
  only 
  for 
  a 
  short 
  

   distance 
  from 
  the 
  tip, 
  and 
  so 
  present 
  a 
  form 
  very 
  similar 
  to 
  that 
  seen 
  

   in 
  Groups 
  I 
  and 
  II. 
  The 
  annulus 
  ventralis 
  of 
  the 
  female 
  is 
  depressed 
  

   in 
  front, 
  more 
  prominent 
  and 
  unituberculate 
  behind, 
  with 
  a 
  closed, 
  

   curved 
  fissure. 
  

  

  The 
  areola 
  is 
  very 
  incorrectly 
  represented 
  in 
  Meek's 
  fig. 
  1. 
  The 
  are- 
  

   ola 
  is 
  entirely 
  obliterated 
  in 
  the 
  middle, 
  not 
  open 
  as 
  there 
  portrayed. 
  

  

  CAMBARUS 
  INDIANENSIS 
  W. 
  P. 
  Hay. 
  

  

  Camharus 
  affinis, 
  rar. 
  Faxox, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  XXII, 
  1890, 
  p. 
  628. 
  

   Camharus 
  iudiaucnsis 
  Hay, 
  20th 
  Ann. 
  Rep. 
  Dept. 
  Geol. 
  Indiana, 
  p. 
  494, 
  fig. 
  9, 
  

   1896. 
  

  

  This 
  form, 
  which 
  I 
  considered 
  as 
  a 
  Western 
  race 
  of 
  Camharus 
  affinis, 
  

   has 
  been 
  described 
  as 
  a 
  distinct 
  species 
  by 
  Mr. 
  Hay. 
  It 
  has 
  been 
  found 
  

   in 
  the 
  Patoka 
  River 
  at 
  Patoka, 
  Indiana, 
  and 
  at 
  Huntington, 
  Dubois 
  

   County, 
  Indiana. 
  

  

  CAMBARUS 
  SLOANII 
  Bundy. 
  

  

  Madison 
  and 
  Marengo, 
  Indiana 
  {Jide 
  W. 
  P. 
  Hay). 
  

  

  CAMBARUS 
  PROPINQUUS 
  Girard. 
  

  

  Lake 
  Douglas 
  and 
  Saginaw 
  River, 
  Michigan; 
  Indian 
  Lake, 
  Water- 
  

   loo, 
  Indiana; 
  Portage 
  River 
  at 
  Oak 
  Harbor, 
  Ottawa 
  County, 
  Ohio. 
  

   (Coll.U.S.N.M.) 
  

  

  