﻿246 
  

  

  E. 
  BAY 
  LANKESTEE. 
  

  

  tracheal 
  tubes. 
  lutromittent 
  organ 
  of 
  male 
  in 
  tlie 
  apical 
  

   segment 
  of 
  the 
  second 
  prosomatic 
  appendage. 
  

  

  Sub-order 
  a. 
  Mesothelse 
  (see 
  Figs. 
  60 
  — 
  62). 
  — 
  Opisthosoma 
  

   distinctly 
  segmented^ 
  furnished 
  with 
  eleven 
  tergal 
  plates^ 
  as 
  

   in 
  the 
  Amblypygi; 
  the 
  ventral 
  surface 
  of 
  the 
  first 
  and 
  second 
  

   somites 
  with 
  large 
  sternal 
  plates, 
  covering 
  the 
  genital 
  aperture 
  

  

  Fig. 
  61. 
  

  

  Fig. 
  62. 
  

  

  I 
  ■-., 
  

  

  I 
  II 
  III 
  IV 
  V 
  VI 
  i 
  

  

  Ffofoiiia 
  '■ 
  

  

  prtpgen 
  1 
  

  

  Fig. 
  61. 
  — 
  Liphistius 
  desultor. 
  Ventral 
  view 
  with 
  the 
  

   prosomatic 
  appendages 
  cut 
  sliort 
  excepting 
  the 
  chelicerse 
  (1) 
  whose 
  

   sharp 
  retroverts 
  are 
  seen. 
  Between 
  the 
  bases 
  of 
  the 
  prosomatic 
  

   limbs 
  an 
  anterior 
  and 
  a 
  posterior 
  sternal 
  plate 
  (black) 
  are 
  seen. 
  1, 
  

   the 
  sternum 
  of 
  the 
  first 
  opisthosomatic 
  or 
  genital 
  somite 
  covering 
  

   the 
  genital 
  aperture 
  and 
  the 
  first 
  pair 
  of 
  lung-sacs. 
  In 
  front 
  of 
  it 
  

   the 
  narrow 
  waist 
  is 
  formed 
  by 
  the 
  soft 
  sternal 
  area 
  of 
  the 
  pra3- 
  

   genital 
  somite; 
  2, 
  the 
  sternite 
  of 
  tiie 
  second 
  opisthosomatic 
  somite 
  

   covering 
  the 
  posterior 
  pair 
  of 
  lung-sacs; 
  3 
  and 
  4-, 
  the 
  spinning 
  

   appendages 
  (limbs) 
  of 
  the 
  opisthosoma 
  ; 
  a, 
  inner, 
  6, 
  outer 
  ramus 
  of 
  

   the 
  appendage; 
  11, 
  sternite 
  of 
  the 
  eleventh 
  somite 
  of 
  the 
  opistho- 
  

   soma: 
  in 
  front 
  of 
  it 
  other 
  rudimentary 
  sternites; 
  an, 
  anus. 
  

   (Original 
  as 
  above.) 
  

  

  Fig. 
  62. 
  — 
  Liphistius 
  desultor. 
  Lateral 
  view. 
  I 
  to 
  VI, 
  

   appendages 
  of 
  the 
  prosoma 
  cut 
  off 
  at 
  tiie 
  base; 
  o, 
  ocular 
  tubercle; 
  

   preer/en, 
  the 
  prajgenital 
  somite 
  ; 
  1 
  and 
  2, 
  sternites 
  of 
  the 
  first 
  and 
  

   second 
  opisthosomatic 
  somites; 
  3 
  and 
  4, 
  appendages 
  of 
  the 
  third 
  

   and 
  fourth 
  opisthosomatic 
  somites, 
  which 
  are 
  the 
  spinning 
  organs, 
  

   and 
  in 
  this 
  genus 
  occupy 
  their 
  primitive 
  position 
  instead 
  of 
  migrating 
  

   to 
  the 
  anal 
  region 
  as 
  in 
  other 
  spiders; 
  5, 
  tergite 
  of 
  the 
  fifth 
  opistho- 
  

   somatic 
  somite; 
  11, 
  eleventh 
  opisthosomatic 
  somite; 
  ««, 
  anus. 
  

   (Original.) 
  

  

  and 
  the 
  two 
  pairs 
  of 
  pulmonary 
  sacs, 
  the 
  sternal 
  plates 
  from 
  

   the 
  sixth 
  to 
  the 
  eleventh 
  somites 
  represented 
  by 
  integumental 
  

  

  