﻿STRUCTURE 
  AND 
  CLASSIFICATION 
  OF 
  THE 
  ARACHNIDA. 
  255 
  

  

  opistliosoma 
  agrees 
  iu 
  form 
  and 
  number 
  of 
  somites 
  with 
  the 
  

   abdomen 
  of 
  a 
  Hexapod^ 
  and 
  the 
  tracheal 
  stigmata 
  present 
  

   certain 
  agreements 
  in 
  the 
  two 
  cases. 
  (Reference 
  to 
  literature, 
  

   36.) 
  

  

  Order 
  6. 
  Pseudoscorpiones 
  = 
  Chelonethi, 
  also 
  called 
  Cherne- 
  

   tidia 
  (see 
  Figs. 
  70 
  — 
  72). 
  — 
  Prosoma 
  covered 
  by 
  a 
  single 
  dorsal 
  

   shield, 
  at 
  most 
  furnished 
  with 
  one 
  or 
  two 
  diplostichous 
  

  

  Tig. 
  70. 
  

  

  Pjg. 
  71. 
  

  

  Fig. 
  70. 
  — 
  Gary 
  pus 
  litoralis, 
  one 
  of 
  the 
  Pseudoscoipiones. 
  

   Ventral 
  view. 
  I 
  to 
  VI, 
  prosomatic 
  appendages 
  ; 
  o, 
  sterno-coxal 
  

   process 
  of 
  the 
  basal 
  segment 
  of 
  the 
  second 
  appendage; 
  1, 
  sternite 
  

   of 
  tlie 
  genital 
  or 
  first 
  opisthosomatic 
  somite 
  ; 
  the 
  prsegenital 
  somite, 
  

   though 
  represented 
  by 
  a 
  tergum, 
  has 
  no 
  separate 
  sternal 
  plate 
  ; 
  2 
  

   and 
  3, 
  sternites 
  of 
  the 
  second 
  and 
  third 
  somites 
  of 
  the 
  opistliosoma, 
  

   each 
  showing 
  a 
  tracheal 
  stigma; 
  10 
  and 
  11, 
  sternites 
  of 
  the 
  tenth 
  

   and 
  eleventh 
  somites 
  of 
  the 
  opisthosoma; 
  an, 
  anus. 
  (Original 
  by 
  

   Pocock 
  and 
  Pickard-Cambridge.) 
  

  

  Fig. 
  71. 
  — 
  Garypus 
  litoralis, 
  one 
  of 
  the 
  Pseudoscorpiones. 
  

   Dorsal 
  view. 
  I 
  to 
  VI, 
  the 
  prosomatic 
  appendages; 
  o, 
  eyes 
  ; 
  puegen, 
  

   prjegenital 
  somite 
  ; 
  1 
  tergite 
  of 
  the 
  genital 
  or 
  first 
  opisthosomatic 
  

   somite; 
  10, 
  tergite 
  of 
  the 
  tenth 
  somite 
  of 
  the 
  opisthosoma; 
  11, 
  

   the 
  evanescent 
  eleventh 
  somite 
  of 
  the 
  opisthosoma 
  ; 
  an, 
  anus. 
  

   (Original.) 
  

  

  lateral 
  eyes; 
  sternal 
  elements 
  obliterated 
  or 
  almost 
  obli- 
  

   terated. 
  Appendages 
  of 
  the 
  first 
  pair 
  bisegmented 
  com- 
  

   pletely 
  chelate, 
  furnished 
  with 
  peculiar 
  organs, 
  the 
  serrula 
  

  

  