﻿264 
  PROCEEDINaS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  voi.. 
  44. 
  

  

  Family 
  CANTHOCAMPTIDiE. 
  

  

  CANCRINCOLA, 
  new 
  genus. 
  

  

  • 
  Generic 
  characters. 
  — 
  Body 
  made 
  up 
  of 
  10 
  segments, 
  slender, 
  cylin- 
  

   drical 
  or 
  somewhat 
  spindle-shaped, 
  the 
  anterior 
  end 
  of 
  the 
  spindle 
  

   nmch 
  shorter 
  than 
  the 
  posterior. 
  Cephalic 
  segment 
  short 
  and 
  nar- 
  

   rowed 
  anteriorly; 
  rostrum 
  minute 
  and 
  rudimentary. 
  Free 
  thorax 
  

   segments 
  diminishing 
  slightly 
  but 
  regularly 
  in 
  width 
  from 
  in 
  front 
  

   backward. 
  Fifth 
  and 
  sixth 
  segments 
  more 
  distinctly 
  separated 
  

   than 
  in 
  Cantlwcamptus. 
  First 
  abdomen 
  segment 
  about 
  as 
  wide 
  as 
  

   the 
  genital 
  segment, 
  the 
  two 
  others 
  somewhat 
  narrow^er; 
  anal 
  

   laminae 
  short 
  and 
  rather 
  stout, 
  each 
  bearing 
  an 
  enormous 
  curved 
  

   seta, 
  half 
  as 
  long 
  as 
  the 
  entire 
  body 
  or 
  more; 
  no 
  anal 
  opercle. 
  

  

  Anterior 
  antennae 
  stout 
  and 
  thickset, 
  eight-jointed, 
  those 
  of 
  the 
  

   male 
  strongly 
  hinged. 
  Posterior 
  antenna 
  short, 
  the 
  outer 
  ramus 
  

   very 
  small 
  and 
  one-jointed; 
  mandibular 
  palp 
  simple 
  and 
  also 
  one- 
  

   jointed. 
  

  

  Anterior 
  maxillae 
  with 
  well-defined 
  endopod 
  and 
  exopod, 
  the 
  latter 
  

   armed 
  with 
  a 
  stout, 
  claw-like 
  spine; 
  posterior 
  maxillae 
  with 
  only 
  a 
  

   single 
  digitiform 
  lobe 
  inside 
  the 
  claw-bearing 
  joint; 
  maxillipeds 
  

   normally 
  developed. 
  

  

  First 
  swimming 
  legs 
  with 
  the 
  inner 
  ramus 
  two-jointed, 
  much 
  

   longer 
  than 
  the 
  outer 
  one, 
  and 
  modified 
  for 
  clasping; 
  other 
  swimming 
  

   legs 
  with 
  the 
  outer 
  ramus 
  longer 
  than 
  the 
  inner, 
  both 
  rami 
  three- 
  

   jointed; 
  fifth 
  pair 
  in 
  the 
  female 
  distinctly 
  lamellar, 
  with 
  the 
  basal 
  

   joint 
  expanded 
  on 
  the 
  inner 
  side. 
  Only 
  a 
  single 
  ovisac. 
  

  

  Ty2)e 
  species 
  — 
  Cancrincola 
  jamaicensis, 
  new 
  species. 
  

  

  {Cancrincola, 
  cancer, 
  a 
  crab, 
  and 
  incola, 
  dweller 
  or 
  inhabitant.) 
  

  

  CANCRINCOLA 
  JAMAICENSIS, 
  new 
  species. 
  

   Plate 
  50, 
  fig. 
  281; 
  fig. 
  51, 
  figs. 
  282, 
  3; 
  plate 
  52. 
  

  

  Type.— 
  One 
  female, 
  Cat. 
  No. 
  43506, 
  U.S.N.M., 
  taken 
  from 
  the 
  

   gills 
  of 
  the 
  white 
  land 
  crab, 
  Cardisoma 
  guanhumi, 
  at 
  Montego 
  Bay. 
  

   Paratypes, 
  30 
  specimens, 
  including 
  both 
  sexes, 
  taken 
  from 
  the 
  same 
  

   host, 
  Cat. 
  No. 
  4359v3, 
  U.S.N.AL 
  

  

  Female. 
  — 
  Body 
  slender, 
  more 
  than 
  four 
  times 
  as 
  long 
  as 
  wide, 
  

   cylindrical, 
  tapering 
  gradually 
  posteriorly. 
  Cephahc 
  segment 
  slightly 
  

   longer 
  than 
  the 
  two 
  following 
  segments 
  combined, 
  strongly 
  narrowed 
  

   anteriorly; 
  rostrum 
  very 
  small 
  and 
  triangular. 
  Eye 
  well 
  developed 
  

   and 
  placed 
  far 
  forward. 
  

  

  First 
  free 
  segment 
  a 
  trifle 
  wider 
  than 
  the 
  cephalon 
  and 
  considerably 
  

   longer 
  than 
  any 
  of 
  the 
  following 
  segments; 
  fifth 
  and 
  sixth 
  segments 
  

   distinctly 
  separated; 
  first 
  abdomen 
  segment 
  wider 
  and 
  longer 
  than 
  

   either 
  of 
  the 
  two 
  which 
  follow 
  it; 
  terminal 
  segment 
  deeply 
  incised 
  

   at 
  the 
  center 
  and 
  without 
  any 
  anal 
  opercle. 
  

  

  