﻿CRtrSTACEA, 
  553 
  

  

  rather 
  long 
  whitish 
  hairs, 
  the 
  chelipedes 
  rather 
  slender 
  ; 
  finger-tips 
  

   white. 
  

  

  By 
  Kossmann 
  (t. 
  c. 
  zweito 
  Hiilfte, 
  p. 
  G7, 
  1880) 
  D. 
  unklcntata 
  and 
  

   D. 
  rotunda 
  are 
  regarded 
  as 
  sj'iionyraons. 
  The 
  specimens 
  collected 
  

   by 
  Kossmann 
  in 
  the 
  lied 
  Sea 
  are 
  distinguished 
  from 
  D. 
  spongiosa 
  

   var. 
  sthnpsonli 
  b}' 
  the 
  prominent 
  lateral 
  teeth 
  of 
  the 
  rostrum 
  and 
  

   the 
  existence 
  of 
  a 
  distinct 
  lateral 
  marginal 
  tooth 
  behind 
  the 
  cervical 
  

   suture. 
  

  

  2. 
  Dromia 
  vulgaris, 
  M.-Edw. 
  

  

  Two 
  very 
  smaU 
  specimens 
  from 
  Providence 
  Island, 
  19 
  fms. 
  (No. 
  

   217), 
  are 
  perhaps 
  referable 
  to 
  this 
  species. 
  They 
  do 
  not 
  present 
  

   the 
  elongated 
  tubercles 
  on 
  the 
  sternal 
  surface 
  characteristic, 
  as 
  Hil- 
  

   gendorf 
  has 
  shown, 
  of 
  D. 
  rumj^hu*, 
  to 
  which 
  species 
  a 
  specimen 
  

   from 
  the 
  Mauritius 
  (M. 
  RohUlard), 
  which 
  I 
  formerly 
  designated 
  as 
  

   D. 
  vulgaris, 
  is 
  to 
  be 
  referred, 
  as 
  the 
  sternal 
  tubercles 
  are 
  strongly 
  

   developed. 
  A 
  female, 
  presumably 
  from 
  the 
  Indian 
  Ocean 
  (General 
  

   Hardwiclr), 
  apparently 
  belongs 
  to 
  B. 
  vulgaris, 
  since 
  in 
  this 
  speci- 
  

   men 
  the 
  sternal 
  tubercles 
  are 
  absent 
  ; 
  yet 
  it 
  is 
  to 
  be 
  noted 
  that 
  it 
  

   presents 
  but 
  slight 
  indications 
  of 
  the 
  secondary 
  tubercle 
  or 
  spine 
  

   behind 
  the 
  base 
  of 
  the 
  second 
  antero-latcral 
  marginal 
  spine 
  which 
  

   is 
  generally 
  characteristic 
  of 
  D. 
  vulgaris. 
  In 
  the 
  specimen 
  from 
  

   Mauritius 
  also 
  the 
  secondary 
  lateral 
  spine 
  is 
  absent, 
  but 
  in 
  an 
  

   adult 
  male 
  Malayasian 
  specimen 
  from 
  Dr. 
  Bleeker's 
  collection 
  it 
  is 
  

   strongly 
  developed. 
  

  

  HOMALODROMIA, 
  gen. 
  nov. 
  

  

  Carapace 
  flattened 
  above, 
  somewhat 
  hexagonal 
  in 
  shape, 
  almost 
  as 
  

   broad 
  as 
  long. 
  Front 
  broad, 
  consisting 
  of 
  two 
  prominent 
  lobes 
  which 
  

   project 
  over 
  and 
  beyond 
  the 
  bases 
  of 
  the 
  antennae, 
  and 
  are 
  each 
  exca- 
  

   vated 
  at 
  the 
  distal 
  extremity. 
  Epistoma 
  (or 
  interantennulary 
  septum 
  ) 
  

   triangulate 
  and 
  united 
  with 
  the 
  front. 
  Palate 
  with 
  faintly 
  defined 
  

   longitudinal 
  ridges 
  {collicuU). 
  The 
  sternal 
  sidci 
  in 
  the 
  female 
  ter- 
  

   minate 
  in 
  two 
  strong 
  tubercles, 
  which 
  are 
  nearly 
  in 
  contact 
  at 
  their 
  

   bases, 
  and 
  are 
  situated 
  between 
  the 
  bases 
  of 
  the 
  chelipedes, 
  which 
  

   have 
  tlie 
  apices 
  of 
  the 
  fingers 
  denticulated, 
  corneous, 
  and 
  excavated. 
  

   Ambulatory 
  legs 
  of 
  the 
  second 
  and 
  third 
  pairs 
  without 
  spines 
  or 
  

   tubercles, 
  with 
  the 
  merus-joint 
  not 
  dilated, 
  the 
  daetyli 
  slightly 
  curved 
  

   and 
  armed 
  on 
  the 
  inferior 
  margin 
  with 
  two 
  or 
  three 
  accessory 
  spi- 
  

   nules. 
  Fourth 
  legs 
  more 
  robust 
  and 
  much 
  shorter 
  than 
  the 
  fifth 
  

   pair 
  and 
  scarcely 
  prehensile, 
  the 
  penultimate 
  joint 
  being 
  armed 
  at 
  its 
  

   distal 
  extremity 
  with 
  a 
  very 
  small 
  spinule. 
  Fifth 
  legs 
  slender 
  and 
  

   elongated 
  (yet 
  less 
  elongated 
  than 
  in 
  Pseadodrurnia), 
  shorter 
  than 
  

   the 
  second 
  legs, 
  prehensile, 
  with 
  the 
  penultimate 
  joint 
  shorter 
  

   than 
  the 
  preceding, 
  and 
  its 
  terminal 
  spine 
  slender, 
  arcuate, 
  and 
  

   about 
  as 
  long 
  as 
  the 
  slender 
  arcuate 
  dactylus. 
  

  

  This 
  genus 
  cannot 
  be 
  confounded 
  with 
  any 
  known 
  lo 
  me. 
  It 
  

   * 
  Monatsbc)-. 
  Akad. 
  \Vi:^s. 
  Berlin, 
  p. 
  813 
  (1878). 
  

  

  