﻿242 
  E. 
  KAY 
  LANKESTER. 
  

  

  jointed 
  feeler. 
  Appenclag-es 
  of 
  second 
  pair 
  folding 
  in 
  a 
  

   horizontal 
  plane, 
  complete 
  chelate, 
  the 
  claw 
  immovably 
  united 
  

   to 
  the 
  sixth 
  segment. 
  Respiratory 
  organs 
  present 
  in 
  the 
  

   form 
  of 
  pulmonary 
  sacs. 
  

  

  Family 
  Thelyphonidae 
  (Thelyphonus 
  [Fig. 
  54], 
  Hypoc- 
  

   tonus, 
  ^Geralinura). 
  

  

  Tribe 
  2. 
  Tartarides. 
  — 
  Small 
  degenerate 
  forms, 
  with 
  the 
  

   dorsal 
  area 
  of 
  the 
  prosoma 
  furnished 
  with 
  two 
  shields, 
  a 
  

   larger 
  in 
  front 
  covering 
  the 
  anterior 
  four 
  somites, 
  and 
  a 
  

   smaller 
  behind 
  covering 
  the 
  fifth 
  and 
  sixth 
  somites 
  ; 
  the 
  

   latter 
  generally 
  subdivided 
  into 
  a 
  right 
  and 
  left 
  portion 
  ; 
  

  

  Fig. 
  55. 
  

  

  ophtho 
  1 
  

  

  opiitho 
  2 
  

  

  Fig. 
  55. 
  — 
  Thelyphonus 
  sp. 
  Ventral 
  view 
  of 
  the 
  anterior 
  portion 
  

   of 
  the 
  body 
  to 
  show 
  the 
  three 
  prososoniatic 
  sternal 
  plates 
  a, 
  b, 
  c, 
  and 
  

   the 
  rudimentary 
  sternal 
  element 
  of 
  the 
  prae-genital 
  somite 
  ; 
  opistho 
  1, 
  

   first 
  somite 
  of 
  the 
  opisthosoma. 
  (From 
  a 
  drawing 
  made 
  by 
  Mr. 
  Pickard- 
  

   Cambridge, 
  under 
  the 
  directien 
  of 
  Mr. 
  R. 
  I. 
  Pocock.) 
  

  

  Fig. 
  56. 
  — 
  Thelyphonus 
  assamensis 
  (^ 
  . 
  Ventral 
  surface 
  of 
  the 
  

   anterior 
  region 
  of 
  the 
  opisthosoma, 
  the 
  first 
  somite 
  being 
  pushed 
  up- 
  

   wards 
  and 
  forwards 
  so 
  as 
  to 
  expose 
  the 
  subjacent 
  structures, 
  opisikol, 
  

   first 
  somite 
  of 
  the 
  opisthosoma 
  ; 
  opistho 
  2, 
  second 
  do. 
  ; 
  ff, 
  genital 
  

   aperture 
  ; 
  /, 
  edges 
  of 
  the 
  lamellse 
  of 
  the 
  lung-books 
  ; 
  m, 
  stigmata 
  of 
  

   tergo-sternal 
  muscles. 
  (Original 
  drawing 
  by 
  Mr. 
  Pocock.) 
  

  

  rarely 
  there 
  is 
  a 
  pair 
  of 
  narrow 
  sclerites 
  interposed 
  between 
  

   the 
  anterior 
  and 
  posterior 
  shields. 
  Eyes 
  evanescent 
  or 
  absent. 
  

   Appendages 
  of 
  second 
  pair 
  folding 
  in 
  a 
  vertical 
  plane, 
  not 
  

   chelate, 
  the 
  claw 
  long 
  and 
  movable. 
  Post-anal 
  sclerite 
  short 
  

   and 
  undivided. 
  No 
  distinct 
  respiratory 
  stigmata 
  behind 
  the 
  

   sterna 
  of 
  the 
  first 
  and 
  second 
  somites 
  of 
  the 
  opisthosoma. 
  

  

  