﻿684 
  J'li 
  ^ 
  CEEDIXG 
  S 
  OF 
  THE 
  NA 
  TIONA 
  L 
  M 
  USE 
  UM. 
  

  

  otlier 
  except 
  posteriorly, 
  where 
  they 
  converge; 
  they 
  are 
  armed 
  ante- 
  

   riorly 
  with 
  a 
  minute 
  spine. 
  Anterior 
  border 
  of 
  the 
  carapace 
  produced 
  to 
  

   form 
  a 
  short 
  subocular 
  spine. 
  Branchiostegian 
  spinule 
  minute. 
  Cer- 
  

   vical 
  groove 
  sinuous. 
  Areola 
  broad, 
  about 
  one-half 
  as 
  long 
  as 
  the 
  ante- 
  

   rior 
  section 
  of 
  the 
  carapace. 
  The 
  branchio-cardiac 
  lines 
  form 
  a 
  slightly 
  

   raised, 
  blunt 
  ridge 
  in 
  the 
  anterior 
  part 
  of 
  their 
  course. 
  Sides 
  of 
  cara- 
  

   pace 
  granulate; 
  no 
  lateral 
  spines. 
  Abdomen 
  longer 
  than 
  ceplialo- 
  

   thorax, 
  pleune 
  broadly 
  rounded, 
  Telson 
  truncate, 
  with 
  posterior 
  

   corners 
  rounded 
  ; 
  a 
  pair 
  of 
  lateral 
  spines 
  about 
  two-thirds 
  the 
  way 
  

   from 
  the 
  proximal 
  to 
  the 
  distal 
  ends. 
  Anterior 
  process 
  of 
  epistome 
  

   broad, 
  separated 
  from 
  the 
  posterior 
  part 
  by 
  a 
  transverse 
  furrow, 
  sides 
  

   slightly 
  convex, 
  apex 
  blunt. 
  

  

  Antennae 
  rather 
  short; 
  proximal 
  segment 
  armed 
  with 
  one 
  small 
  

   spine 
  external 
  to 
  the 
  orifice 
  of 
  the 
  green 
  gland; 
  two 
  more 
  small 
  spines 
  

   on 
  the 
  external 
  side 
  of 
  the 
  antenna, 
  one 
  at 
  the 
  base 
  of 
  the 
  scale, 
  the 
  

   other 
  farther 
  forward 
  and 
  at 
  a 
  lower 
  level 
  ; 
  antennal 
  scale 
  short 
  and 
  

   broad, 
  broadest 
  at 
  the 
  middle, 
  internal 
  border 
  very 
  convex, 
  external 
  

   border 
  inflated 
  and 
  terminated 
  by 
  a 
  small 
  spine. 
  Third 
  maxillipeds 
  

   densely 
  bearded. 
  Chelipeds 
  of 
  moderate 
  length; 
  margins 
  of 
  merus 
  

   spinulose, 
  lower 
  face 
  spinuloso-granular, 
  as 
  is 
  also 
  the 
  distal 
  part 
  of 
  

   the 
  inner 
  face; 
  carpus 
  triangular, 
  upper 
  border 
  and 
  inner 
  face 
  thickly 
  

   set 
  with 
  small 
  spiniform 
  tubercles, 
  outer 
  face 
  squamoso-tuberculous; 
  

   chelip 
  of 
  moderate 
  length, 
  symmetrical, 
  inflated, 
  ornamented 
  with 
  low 
  

   squamous 
  tubercles 
  on 
  the 
  superior 
  and 
  inferior 
  margins, 
  outer 
  face 
  

   nearly 
  smooth, 
  inner 
  face 
  clothed 
  with 
  long 
  hairs; 
  fingers 
  longer 
  than 
  

   the 
  palm, 
  incurved, 
  their 
  inner 
  faces 
  excavated, 
  bearded, 
  cutting 
  edges 
  

   denticulate, 
  with 
  one 
  prominent 
  denticle 
  on 
  each 
  finger 
  — 
  the 
  one 
  on 
  the 
  

   movable 
  finger 
  proximad 
  of 
  the 
  one 
  on 
  the 
  immovable 
  finger; 
  tips 
  acute. 
  

  

  Length 
  90 
  mm.; 
  carapace 
  42 
  mm.; 
  from 
  tip 
  of 
  rostrum 
  to 
  cervical 
  

   groove 
  28 
  mm. 
  ; 
  from 
  cervical 
  groove 
  to 
  posterior 
  border 
  of 
  carapace 
  

   14 
  mm,; 
  length 
  of 
  abdomen 
  45 
  mm.; 
  width 
  of 
  areola 
  5 
  mm.; 
  length 
  

   of 
  cheliped 
  59 
  mm.; 
  merus 
  16 
  mm.; 
  length 
  of 
  chela 
  25 
  mm.; 
  breadth 
  

   of 
  chela 
  11 
  mm. 
  ; 
  length 
  of 
  dactylus 
  15 
  mm. 
  

  

  Eahitat.—Mo\\tm\A%o, 
  Uruguay. 
  W. 
  E. 
  Safford, 
  TJ. 
  S. 
  S. 
  " 
  Vandalia." 
  

   (No. 
  12581, 
  Coll. 
  U.S.N.M.) 
  Three 
  specimens. 
  There 
  is 
  also 
  a 
  small 
  

   specimen 
  in 
  the 
  collection 
  of 
  the 
  Philadelj)hia 
  Academy 
  of 
  Sciences 
  

   labeled, 
  "Brazil" 
  (No, 
  287 
  Guerin 
  Coll.). 
  According 
  to 
  the 
  manu- 
  

   script 
  label 
  accompanying 
  the 
  specimens 
  in 
  the 
  United 
  States 
  National 
  

   Museum, 
  they 
  were 
  found 
  in 
  burrows 
  one 
  hundred 
  meters 
  from 
  the 
  coast 
  

   and 
  two 
  meters 
  deep, 
  in 
  strata 
  of 
  sand 
  covered 
  by 
  soil. 
  

  

  This 
  species 
  is 
  allied 
  to 
  Parastueus 
  pilimanus^ 
  and 
  P. 
  brasiliensis.^ 
  

  

  1 
  Astavus 
  pilimanus 
  vox 
  Martens, 
  Arch. 
  f. 
  Naturgesch,, 
  35ter 
  Jahrg,, 
  I, 
  p, 
  15, 
  pi. 
  ii, 
  

   figs. 
  1, 
  11), 
  1869. 
  — 
  ParastacusjnJimavKsHvxhKY, 
  Pioc. 
  Zool. 
  Soc. 
  London, 
  1878, 
  p. 
  771. 
  

   Habitat. 
  — 
  Porto 
  Alegre, 
  and 
  alwo 
  Santa 
  Cruz, 
  in 
  iip])er 
  part 
  of 
  the 
  Rio 
  Pardo 
  basin, 
  ; 
  

   tributary 
  of 
  the 
  .Tucuhy. 
  Brazil. 
  Types 
  in 
  Berlin 
  Zool. 
  Mus., 
  Nos. 
  3323, 
  3447 
  (von 
  

   Martens). 
  

  

  -Asianis 
  hrasiUcnsis 
  vox 
  Martens, 
  Arch. 
  f. 
  Naturgesch., 
  35ter 
  Jahrg., 
  I, 
  p. 
  16, 
  pi. 
  ii, 
  

   figs. 
  2, 
  2b, 
  1869. 
  — 
  Parastacus 
  brasilunsis 
  Huxley, 
  Proc. 
  Zool. 
  Soc. 
  London, 
  1878, 
  

  

  