﻿Rostro-carinate 
  Flint 
  Implements 
  and 
  Allied 
  Forms. 
  351 
  

  

  From 
  it 
  (fig. 
  1) 
  we 
  can 
  imagine 
  the 
  flint-worker 
  developing 
  — 
  as 
  group 
  1 
  — 
  the 
  

   more 
  flattened 
  " 
  batiform 
  " 
  implement 
  (of 
  rare 
  occurrence), 
  still 
  showing 
  a 
  

   median 
  dorsal 
  carina, 
  and 
  in 
  contrast 
  to 
  this 
  — 
  as 
  group 
  2 
  — 
  the 
  platessiform 
  

   (Chellean 
  or 
  Acheulian) 
  implements 
  with 
  the 
  carina 
  forming 
  one 
  lateral 
  

   margin 
  and 
  the 
  ventral 
  area 
  either 
  flaked 
  down 
  to 
  form 
  the 
  opposite 
  margin 
  

   or 
  translated 
  into 
  a 
  lateral 
  position. 
  From 
  the 
  most 
  generalised 
  rostro- 
  

   carinate 
  (fig. 
  1) 
  by 
  curvature 
  of 
  the 
  rostrum, 
  often 
  followed 
  by 
  dislocation 
  

   or 
  complete 
  " 
  atrophy 
  " 
  of 
  the 
  ventral 
  and 
  of 
  the 
  dorsal 
  plane 
  (as 
  in 
  

   the 
  transitionals 
  to 
  the 
  platessi-form 
  type), 
  we 
  get 
  group 
  3, 
  the 
  " 
  uncinate 
  " 
  

   simplified 
  type, 
  figured 
  in 
  this 
  paper. 
  And 
  lastly, 
  as 
  the 
  exact 
  com- 
  

   plement 
  of 
  this 
  we 
  get 
  group 
  4 
  — 
  a 
  form 
  showing 
  the 
  complete 
  atrophy 
  

   of 
  rostrum 
  and 
  carina, 
  with 
  full 
  and 
  emphatic 
  development 
  of 
  the 
  parts 
  

   atrophied 
  in 
  group 
  3. 
  The 
  type 
  of 
  group 
  4 
  is 
  the 
  heavy 
  and 
  useful 
  

   " 
  jack-plane 
  " 
  figured 
  in 
  the 
  present 
  paper. 
  

  

  Probably 
  at 
  any 
  time 
  the 
  flint 
  worker 
  habitually 
  made 
  such 
  flaked 
  pieces 
  

   and 
  chipped 
  forms 
  as 
  the 
  piece 
  of 
  flint 
  which 
  he 
  picked 
  up 
  and 
  his 
  own 
  

   consciousness 
  of 
  skill 
  suggested 
  to 
  him. 
  At 
  the 
  same 
  time 
  there 
  is 
  evidence 
  

   of 
  such 
  relationship 
  in 
  his 
  mind 
  and 
  intention, 
  in 
  regard 
  to 
  the 
  forms 
  

   manufactured 
  by 
  him, 
  as 
  I 
  have 
  here 
  sketched. 
  There 
  were 
  probably 
  

   " 
  schools 
  " 
  and 
  traditions 
  in 
  this 
  art 
  succeeding 
  one 
  another, 
  and 
  influenced 
  

   by 
  what 
  had 
  been 
  established 
  practice. 
  

  

  The 
  passage 
  from 
  simple 
  flakes 
  to 
  the 
  side-scrapers 
  and 
  spear-head-like 
  

   Moustierian 
  implements 
  is 
  readily 
  understood, 
  whilst 
  there 
  are 
  easy 
  steps 
  

   leading 
  from 
  Chellean 
  heavy-butted 
  hand-axes 
  to 
  the 
  rougher 
  Neolithic 
  

   pieces 
  and 
  so 
  to 
  the 
  fine 
  chisel-like 
  or 
  adze-like 
  "celts," 
  both 
  rough 
  and 
  

   polished, 
  of 
  Neolithic 
  and 
  modern 
  stone- 
  weaponed 
  man. 
  

  

  V':' 
  

  

  VOL. 
  XCI. 
  — 
  B. 
  2 
  F 
  

  

  