﻿new 
  and 
  old 
  Buthidse. 
  339 
  

  

  granular 
  above 
  at 
  the 
  sides 
  ; 
  inferior 
  and 
  lateral 
  keels 
  evenly 
  

   granular 
  throughout 
  and 
  nowhere 
  denticulate; 
  the 
  granules 
  

   of 
  the 
  inferior 
  intercarinal 
  spaces 
  are 
  arranged 
  on 
  each 
  side 
  in 
  

   a 
  definite 
  series, 
  thus 
  constituting 
  a 
  keel, 
  so 
  that 
  when 
  viewed 
  

   from 
  below 
  this 
  segment 
  appears 
  to 
  be 
  furnished 
  with 
  five 
  

   keels. 
  

  

  Vesicle 
  large, 
  dilated, 
  its 
  height 
  being 
  as 
  great 
  as 
  or 
  greater 
  

   than 
  its 
  width 
  and 
  as 
  great 
  as 
  or 
  a 
  little 
  greater 
  than 
  the 
  width 
  

   of 
  the 
  anterior 
  end 
  of 
  the 
  fifth 
  caudal 
  segment 
  ; 
  granular 
  be- 
  

   neath 
  ; 
  aculeus 
  sharply 
  curved 
  backwards, 
  considerably 
  or 
  a 
  

   little 
  shorter 
  than 
  the 
  vesicle 
  ; 
  together 
  the 
  two 
  are 
  about 
  as 
  

   long 
  as 
  the 
  fifth 
  caudal 
  segment. 
  

  

  Palp. 
  — 
  Humerus 
  almost 
  as 
  in 
  B. 
  hottentotta, 
  except 
  that 
  the 
  

   granules 
  are 
  finer 
  ; 
  brachium 
  not 
  costate 
  behind 
  ; 
  superior 
  

   keels 
  very 
  finely 
  granular 
  ; 
  anterior 
  keels 
  more 
  coarsely 
  

   granular. 
  Manus 
  not 
  costate 
  ; 
  a 
  little 
  narrower 
  than 
  the 
  

   brachium 
  and 
  shorter 
  than 
  the 
  dactyli 
  ; 
  dactyli 
  long, 
  slender, 
  

   incurved 
  ; 
  the 
  movable 
  dactylus 
  in 
  one 
  specimen 
  about 
  twice 
  

   the 
  length 
  of 
  the 
  '* 
  hand-back," 
  in 
  the 
  others 
  considerably 
  

   less 
  so 
  ; 
  the 
  movable 
  dactylus 
  furnished 
  with 
  a 
  small 
  basal 
  

   lobe. 
  External 
  surface 
  of 
  femora 
  of 
  legs 
  granular. 
  

  

  Pectines 
  (exclusive 
  of 
  the 
  teeth) 
  shorter 
  than 
  the 
  cephalo- 
  

   thorax 
  ; 
  number 
  of 
  teeth 
  24-25 
  (??), 
  in 
  one 
  specimen 
  28- 
  

   29 
  (c??). 
  

  

  All 
  the 
  appendages 
  are 
  hairy, 
  mostly 
  sparsely 
  so, 
  but 
  on 
  

   the 
  manus 
  and 
  dactyli 
  the 
  hairs 
  are 
  very 
  short 
  and 
  close-set 
  ; 
  

   the 
  anterior 
  margin 
  of 
  the 
  cephalothorax 
  is 
  furnished 
  with 
  a 
  

   row 
  of 
  hairs, 
  and 
  on 
  the 
  under 
  surface 
  of 
  the 
  tail 
  the 
  hairs 
  are 
  

   few 
  but 
  symmetrically 
  arranged. 
  

  

  Measurements 
  in 
  millimetres 
  of 
  largest 
  specimen. 
  — 
  Total 
  

   length 
  76, 
  of 
  tail 
  44, 
  of 
  cephalothorax 
  9; 
  width 
  10; 
  first 
  

   tail-segment, 
  length 
  5^, 
  width 
  5|, 
  height 
  4| 
  ; 
  fifth 
  tail- 
  

   segment, 
  length 
  9j, 
  width 
  4£, 
  height 
  4| 
  ; 
  vesicle, 
  length 
  6£, 
  

   width 
  4j, 
  height 
  4^ 
  ; 
  palp, 
  length 
  of 
  humerus 
  7, 
  of 
  brachium 
  

   8f 
  , 
  width 
  of 
  latter 
  4 
  ; 
  width 
  of 
  hand 
  3| 
  ; 
  length 
  of 
  " 
  hand- 
  

   back 
  " 
  5§, 
  of 
  movable 
  finger 
  10| 
  ; 
  length 
  of 
  pecten 
  7f. 
  

  

  Four 
  specimens 
  collected 
  in 
  the 
  Island 
  of 
  Socotra 
  by 
  Prof. 
  

   Baillie 
  Balfour. 
  

  

  I 
  am 
  doubtful 
  as 
  to 
  the 
  sex 
  of 
  these 
  specimens 
  ; 
  possibly 
  

   the 
  one 
  presenting 
  twenty-eight 
  pectinal 
  teeth 
  is 
  a 
  male 
  ; 
  if 
  

   so 
  this 
  variation 
  in 
  the 
  number 
  of 
  pectinal 
  teeth 
  is 
  the 
  only 
  

   noticeable 
  character 
  by 
  which 
  the 
  sexes 
  may 
  be 
  separated. 
  

  

  In 
  the 
  length 
  of 
  the 
  fingers 
  and 
  slenderness 
  of 
  the 
  hand 
  

   <his 
  species 
  somewhat 
  calls 
  to 
  mind 
  the 
  female 
  of 
  B. 
  Mar- 
  

   iensii', 
  but 
  the 
  movable 
  dactylus 
  is 
  furnished 
  with 
  a 
  much 
  

  

  