﻿340 
  Mr. 
  R. 
  I. 
  Poeock 
  on 
  some 
  

  

  more 
  conspicuous 
  basal 
  lobe 
  than 
  in 
  the 
  female 
  of 
  that 
  

   species. 
  It 
  differs 
  from 
  both 
  B. 
  hottentotta 
  and 
  B. 
  Martensii 
  in 
  

   its 
  larger' 
  and 
  more 
  widely 
  separated 
  median 
  eyes, 
  in 
  its 
  more 
  

   widely 
  separated 
  and 
  more 
  parallel 
  posterior 
  cephalothoracic 
  

   carinas, 
  in 
  its 
  larger 
  vesicle, 
  and, 
  above 
  all, 
  by 
  the 
  additional 
  

   twelfth 
  row 
  of 
  granules 
  on 
  the 
  superior 
  surface 
  of 
  the 
  fourth 
  

   caudal 
  segment 
  ; 
  this 
  last 
  is 
  in 
  fact 
  a 
  characteristic 
  by 
  which 
  

   it 
  may 
  be 
  separated 
  from, 
  I 
  believe, 
  all 
  the 
  species 
  of 
  Buthus 
  

   that 
  have 
  been 
  hitherto 
  described, 
  although 
  it 
  is 
  at 
  the 
  same 
  

   time 
  a 
  characteristic 
  which 
  is 
  faintly 
  foreshadowed 
  in 
  the 
  

   reduplication 
  of 
  the 
  series 
  of 
  granules 
  which 
  constitute 
  the 
  

   superior 
  keels 
  of 
  the 
  fourth 
  and 
  fifth 
  caudal 
  segments 
  in 
  some 
  

   of 
  the 
  species 
  allied 
  to 
  B. 
  liosoma. 
  

  

  Buthus 
  atlantis, 
  sp. 
  n. 
  (PL 
  XV. 
  fig. 
  4.) 
  

  

  Cephalothorax 
  almost 
  exactly 
  like 
  that 
  of 
  B. 
  europceus, 
  

   except 
  that 
  the 
  anterior 
  granular 
  keels 
  are 
  set 
  a 
  little 
  nearer 
  

   together 
  ; 
  as 
  in 
  that 
  species, 
  the 
  posterior 
  keels 
  are 
  widely 
  

   separated, 
  very 
  slightly 
  converging, 
  separated 
  anteriorly 
  by 
  a 
  

   smooth 
  space 
  from 
  the 
  internal 
  median 
  keel, 
  but 
  united 
  by 
  a 
  

   conspicuous 
  transverse 
  row 
  of 
  tubercles 
  with 
  the 
  well- 
  

   expressed 
  external 
  median 
  keel 
  ; 
  and, 
  further, 
  between 
  the 
  

   posterior 
  keel 
  and 
  the 
  external 
  margin 
  of 
  the 
  cephalothorax 
  

   there 
  is 
  an 
  additional 
  short 
  series 
  of 
  granules 
  corresponding 
  

   in 
  position 
  with 
  the 
  fifth 
  tergal 
  keel 
  of 
  B. 
  quinque-striatus. 
  

  

  Tergites 
  as 
  in 
  B. 
  europceus, 
  each, 
  except 
  the 
  first 
  two, 
  in 
  

   which 
  the 
  lateral 
  keels 
  are 
  obsolete, 
  marked 
  with 
  three 
  granu- 
  

   lar 
  keels. 
  

  

  Sternites 
  as 
  in 
  B. 
  europceus. 
  

  

  Tail 
  very 
  different 
  from 
  that 
  of 
  the 
  last-named 
  species, 
  

   long, 
  slender, 
  very 
  shallowly 
  excavated 
  above. 
  The 
  first 
  

   segment 
  with 
  ten 
  well-expressed 
  granular 
  keels 
  ; 
  the 
  median 
  

   inferior 
  keels 
  converging 
  behind 
  ; 
  the 
  second 
  segment 
  with 
  

   eight 
  complete 
  keels, 
  the 
  supernumerary 
  median 
  lateral 
  keel 
  

   being 
  merely 
  represented 
  in 
  the 
  posterior 
  half 
  of 
  the 
  segment 
  ; 
  

   the 
  median 
  inferior 
  keels 
  converging 
  behind 
  : 
  third 
  segment 
  

   resembling 
  the 
  second, 
  except 
  that 
  the 
  supernumerary 
  keel 
  

   is 
  still 
  less 
  developed, 
  being 
  represented 
  merely 
  by 
  a 
  few 
  

   granules 
  ; 
  in 
  the 
  fourth 
  segment 
  this 
  keel 
  is 
  absent. 
  The 
  

   superior 
  keels 
  of 
  these 
  four 
  segments 
  are 
  finely 
  granular; 
  the 
  

   inferior 
  keels 
  more 
  coarsely 
  so 
  than 
  the 
  superior, 
  and 
  becoming 
  

   progressively 
  more 
  strongly 
  expressed 
  from 
  behind 
  forwards 
  ; 
  

   the 
  median 
  inferior 
  keels 
  of 
  the 
  second 
  and 
  third 
  segments 
  

   are 
  not 
  denticulated 
  as 
  in 
  B. 
  europceus 
  • 
  all 
  the 
  intercarpal 
  

   spaces 
  are 
  very 
  finely 
  granular. 
  Fifth 
  segment 
  with 
  very 
  

  

  