NO.    I  ARCHKOLOCV    OF    ST.    LAWRENCE    ISLAND COLLINS  337 
Outside  of  the  Eskimo  area  we  find  a  elose  resemblance  to  the  Old 
Bering  Sea  end  scrapers,  side  scrapers,  retouched  flakes,  and  gravers 
(pi.  41)  at  two  recently  discovered  ancient  sites  in  the  west:  the 
Folsom  culture  site  in  northern  Colorado  and  the  lower  levels  of  the 
Signal  Butte  site  in  western  Nebraska  (Roberts,  1935  ;  Strong,  1935). 
The  Old  Bering  Sea  blades  do  not  in  any  way  resemble  the  charac- 
teristic "  Folsom  "  point,  but  with  this  single  exception,  there  seems 
no  doubt  that  the  chipped  stone  artifacts  from  these  two  ancient  sites 
in  Colorado  and  Nebraska  conform  more  closely  to  the  above-men- 
tioned Old  Bering  Sea  types  than  does  any  later  material  from  the 
same  region.  However,  there  is  little  point  in  speculating  as  to  the 
possible  significance  of  this  fact  until  we  know  whether  the  concen- 
tration of  these  particular  types  is  in  itself  indicative  of  antiquity  or 
whether  the  same  combination  of  types  might  also  be  found  at  later 
sites  if  more  complete  information  were  available. 
The  five-sided  rubbing  stones  of  coarse  materials  (pi.  43,  figs.  1-5) 
and  those  of  greenish  prase  with  several  smoothed  edges  (pi.  42,  figs. 
17-19)  seem  to  be  local  Old  Bering  Sea  types. 
With  regard  to  the  various  types  of  rubbed  slate  blades  (pi.  39), 
these  are  so  generally  distributed  among  all  the  Eskimos  that  detailed 
comparisons  are  hardly  necessary.  It  should  be  observed,  however, 
that  the  triangular-shaped  blades  of  the  Old  Bering  Sea  culture  for 
the  most  part  dififer  from  those  of  the  Thule  culture  in  that  they  have 
tangs ;  we  also  note  the  absence  of  the  long  and  narrow  barbed  slate 
blades  which  are  so  characteristic  of  the  Kachemak  Bay  culture  of 
Cook  Inlet  (de  Laguna,  1934,  pi.  31). 
Ruljbed  slate  weapon  or  knife  blades  have  been  found  on  the  lower 
Eraser  River  and  around  Puget  Sound  (Smith,  1903,  fig.  n;  1907, 
fig.  102,  b,  c,  figs.  120,  121,  133).  On  the  Atlantic  side  rubbed  slate 
implements  are  frequently  found  at  archeological  sites  in  the  St. 
Lawrence  Valley  region  and  New  England ;  they  are  especially  char- 
acteristic of  the  old  "  Red  Paint  "  culture  (Moorehead,  1900,  figs.  1 11 ; 
113,  It,  i;  146). 
In  the  Old  World  polished  slate  points  are  found  at  late  Stone  Age 
horizons  in  Scandinavia  (Brjz^gger,  1909,  pp.  61,  62,  85;  Nihlen, 
1927,  fig.  105;  Menghin,  1931,  pi.  30,  figs.  11,  12,  15,  18)  and  in 
northeastern  Siberia,  Kamchatka,  the  Kurile  Islands,  Japan,  Man- 
churia, Formosa,  North  and  South  China,  and  Indo-China  (Torii, 
1915;  Mansuy,  1920,  pi.  4,  figs.  4-6;  Andersson,  1923  a,  p.  6, 
figs.  8-11  ;  Umehara,  1927,  pi.  1-3;  Jochelson,  1928,  p.  41  ;  Menghin, 
1931.  pl-  33,  figs.  7-10;  Bishop,  1933,  p.  397;  Finn,  1934,  pp.  291- 
301).    In  a  general  way  the  distribution  of  slate  blades  in  Eurasia 
