NO.    I  ARCHF.OLOCY    OF    ST.    LAWRKNCE    I.SLANl) COLLINS  IO9 
edges  as  in  figure  1 1 ,  but  these  were  destroyed  when  the  specimen 
was  filed  down  and  poHshed  by  the  Eskimos  from  whom  it  was  pur- 
chased. The  spur  is  trifurcated  and  seems  to  have  been  symmetrical. 
The  rectangular  slots  near  the  middle  were  for  the  purpose  of  lashing 
the  two  sides  together  after  a  split  had  appeared.  Vestiges  of  Old 
Bering  Sea  ornamentation  still  remain. 
Closed  socket  type  III  .v.- — Similar  to  the  above,  but  thicker  in  cross- 
section  ;  the  lateral  spur  is  trifurcated  and  symmetrical,  with  the  center 
prong  longer  than  the  other  two.    (PI.  27,  fig.  5.) 
Closed  socket  type  III  y. — Same  as  type  III  x  except  that  it  has 
the  blade  slit  at  right  angles  to  the  line  hole.    (PI.  27,  figs.  6,  7.) 
These  two  types  are  based  on  four  harpoon  heads  from  Little 
Diomede  Island.  The  fact  that  none  were  found  at  Gambell  may  be 
due  to  accident,  for  several  specimens  from  the  Hillside  site  and 
Miyowagh  have  spurs  which  approach  this  type,  e.  g.,  plate  23,  figure 
12,  and  plate  25,  figure  12.  Furthermore,  the  symmetrical  trifurcated 
spurs  of  these  Diomede  heads,  although  placed  to  one  side  of  the 
socket,  are  essentially  similar  to  the  median  spurs  of  our  open  socket 
types  I  X  and  I  y.  In  view  of  these  circumstances  it  seems  permissible 
to  reserve  for  these  two  types  the  designations  here  given,  on  the 
chance  that  they  will  eventually  be  found  on  St.  Lawrence  Island. 
Closed  socket  type  IV  y. — Straight,  symmetrical  spur;  round  line 
hole,  beveled  below ;  end  blade  at  right  angles  to  line  hole ;  upper  end 
tapering  and  conical,  without  the  longitudinal  ridge  which  is  usually 
present  when  the  blade  slit  is  at  right  angles  to  the  line  hole ;  almost 
round  in  cross-section.    (PI.  23,  fig.  14;  pi.  26,  fig.  12.) 
There  are  only  two  examples  of  this  type — plate  23,  figure  14,  from 
among  the  rocks  at  the  south  end  of  the  Hillside  site,  and  plate  26, 
figure  12,  from  Miyowagh,  cut  18,  40  inches  deep.  Although  in  its 
main  features  this  type  conforms  to  type  V  y,  it  possesses  certain 
minor  but  significant  characters  which  set  it  apart.  First  of  all, 
its  shape  is  unusual — perfectly  straight  and  smooth  from  tip  to  spur — 
whereas  in  all  of  the  types  previously  considered  there  were  surface 
elevations  and  depressions  and  usually  some  degree  of  a  flare  either 
along  the  edges  or  at  the  spur.  Harpoon  heads  like  plate  26,  figures 
16  and  17  (type  V  y),  which  most  closely  approach  the  present  type, 
differ  in  having  a  more  or  less  pronounced  longitudinal  ridge  between 
the  line  hole  and  tip  in  addition  to  well-defined  elevations,  usually 
surmounted  by  "  eyes  ",  around  the  line  hole.  None  of  the  other  closed 
socket  types  have  the  smoothly  rounded  contour,  and  particularly  the 
tapering  conical  upper  end  of  the  present  type ;  these  features  are 
found  elsewhere  only  in  the  open  socket  type  1  x.    Finally,  in  these 
