﻿338 
  Mr. 
  R. 
  I. 
  Pocock 
  on 
  some 
  

  

  distal 
  end 
  of 
  the 
  chelicerse, 
  the 
  area 
  of 
  the 
  lateral 
  and 
  median 
  

   eyes, 
  and 
  of 
  the 
  anterior 
  cephalothoracic 
  keels 
  black. 
  

  

  The 
  species 
  bears 
  considerable 
  resemblance 
  to 
  B. 
  hoitentotla 
  

   and 
  B. 
  Martensii, 
  and 
  undoubtedly 
  appertains 
  to 
  that 
  section 
  

   of 
  the 
  genus 
  of 
  which 
  hottentotla 
  may 
  be 
  regarded 
  as 
  the 
  

   type. 
  

  

  Cephalothorax. 
  — 
  Much 
  the 
  same 
  shape 
  as 
  in 
  hottentotta, 
  

   but 
  the 
  median 
  eyes 
  are 
  larger 
  and 
  considerably 
  more 
  widely 
  

   separated 
  ; 
  anterior 
  keels 
  not 
  smooth 
  between 
  the 
  eyes, 
  diverg- 
  

   ing 
  normally 
  in 
  front 
  and 
  joining 
  each 
  other 
  in 
  the 
  middle 
  

   line 
  on 
  the 
  front 
  edge 
  of 
  the 
  cephalothorax 
  ; 
  the 
  area 
  between 
  

   them 
  almost 
  smooth. 
  The 
  posterior 
  keels 
  almost 
  parallel, 
  

   joining 
  and 
  being 
  in 
  almost 
  the 
  same 
  straight 
  line 
  with 
  the 
  

   internal 
  median 
  keels, 
  which 
  are 
  consequently 
  themselves 
  

   nearly 
  parallel, 
  the 
  two 
  on 
  each 
  side 
  constituting 
  only 
  a 
  slightly 
  

   sinuous 
  line 
  ; 
  the 
  external 
  median 
  keel 
  not 
  prominent 
  and 
  

   not 
  united 
  by 
  a 
  transverse 
  line 
  of 
  tubercles 
  with 
  the 
  anterior 
  

   end 
  of 
  the 
  posterior 
  keel 
  as 
  it 
  is 
  in 
  B. 
  europceus. 
  The 
  rest 
  

   of 
  the 
  cephalothorax 
  sparsely 
  granular. 
  

  

  Tergites. 
  — 
  The 
  first 
  six 
  marked 
  with 
  three 
  keels, 
  although 
  

   the 
  lateral 
  keels 
  of 
  the 
  first 
  may 
  be 
  represented 
  by 
  a 
  single 
  

   large 
  granule 
  only 
  ; 
  these 
  keels 
  granular 
  and 
  becoming 
  pro- 
  

   gressively 
  more 
  expressed 
  from 
  before 
  backwards 
  ; 
  the 
  lateral 
  

   diverging 
  in 
  front 
  ; 
  but 
  none 
  of 
  the 
  keels 
  are 
  conspicuous 
  on 
  

   account 
  of 
  their 
  being 
  of 
  the 
  same 
  colour 
  as 
  the 
  rest 
  of 
  the 
  

   Begment 
  ; 
  keels 
  of 
  the 
  seventh 
  segment 
  like 
  those 
  of, 
  e. 
  g., 
  

   B. 
  hottentotta. 
  

  

  Sternites 
  as 
  in 
  B. 
  hottentotta, 
  except 
  that 
  the 
  four 
  keels 
  of 
  

   the 
  fifth 
  are 
  of 
  the 
  same 
  colour 
  as 
  the 
  rest 
  of 
  the 
  segment. 
  

  

  Tail. 
  — 
  Slightly 
  narrowed 
  from 
  base 
  to 
  apex, 
  considerably 
  

   more 
  shallowly 
  excavated 
  above 
  than 
  in 
  B. 
  hottentotta, 
  B. 
  

   Martensii, 
  and 
  B.judaicus 
  ; 
  upper 
  surface 
  of 
  the 
  fifth 
  segment 
  

   with 
  a 
  shallow 
  depression 
  in 
  its 
  posterior 
  half. 
  The 
  first 
  four 
  

   segments 
  provided 
  each 
  with 
  ten 
  keels, 
  for 
  the 
  most 
  part 
  feebly 
  

   granular 
  ; 
  the 
  inferior 
  keels, 
  almost 
  smooth 
  in 
  front, 
  become 
  

   more 
  granular 
  behind 
  ; 
  the 
  superior 
  keels, 
  on 
  the 
  other 
  hand, 
  

   become 
  less 
  granular 
  behind 
  ; 
  the 
  inferior 
  intercarpal 
  spaces 
  

   smooth 
  behind 
  and 
  becoming 
  more 
  granular 
  in 
  front 
  ; 
  the 
  

   superior 
  intercarpal 
  spaces 
  sparsely 
  granular 
  behind, 
  more 
  

   thickly 
  so 
  in 
  front 
  ; 
  on 
  the 
  fourth 
  segment 
  the 
  granules 
  of 
  

   the 
  upper 
  surface 
  are 
  arranged 
  in 
  a 
  definite 
  longitudinal 
  

   series, 
  and 
  constitute 
  a 
  distinct 
  keel 
  ; 
  consequently 
  this 
  seg- 
  

   ment, 
  having 
  a 
  complete 
  though 
  feeble 
  median 
  lateral 
  keel, 
  is 
  

   supplied 
  with 
  twelve 
  keels. 
  Fifth 
  segment 
  much 
  like 
  that 
  of 
  

   B. 
  hottentotta, 
  but 
  less 
  narrowed 
  behind 
  and 
  less 
  excavated 
  

   above 
  ; 
  superior 
  keels 
  absent, 
  the 
  segment 
  being 
  merely 
  

  

  