EXPLANATION OF PLATE 33. 



Stemmed Arrowpoints, Spearheads, or Knives. 

 Clas.s A. 



FijX. 1. <^»rAKT/.ITE. 



(Cat. No. 34247, r.S.N.M. Truro, BarnstalileCouutv. Massachusetts. A. R. Critten«Ieii ) 



Fig. 2. Porphyry. 



(Cat. No. 61428, U.S. X.ir. La Paz, Lower California. L. Belflin>;.) 



Fig. 3. Quartz Porphyry. 



(Cat. Xo. 18100, U.S.N. M. Klioile Island itroiii a cache of IdO shnilar objects. J. II. 

 Clark.) 



Fig. 4. Black Quartz Porphyry. 



(Cat. No. 32183, U.S.y.M. Kecseville, P:ssex County, New York. A. \V. White.) 



Fig. 5. Mottled Brown Ob.sidian. 



(Cat. No. 21372, IT. S.N. M. Hupa Indian Reservation. Stephen Bowers. i 

 Fig. 6. QUARTZITK. 



(Cat. No. 6111, U.S.X.M:. District of Columhia. ilr.s. M. H. .Schoolcraft.! 



Fig. 7. Chalckdony. 



(Cat. No. 34417, T'.S.N.M. Planter.sville. Morehouse County, Iowa. Ilr. B. H. Brodnax.) 



Fig. 8. Argillitk. 



(Cat. No. 19371, U.S.N.M. Trenton, N'ew Jersey. Dr. C. C. .A.bbott.) 



Fig. 9. White Quartz. 



(Cat. No. 19008, U.S.N.M. (Iriffin, Sj)auMin>; County, Georgia. W. V. Bailey.) 

 Fig. 10. Brow.v Jasper. 



(Cat. No. 34861, U.S.N.M. Island in Susijuehannah River. F. G. Gailbraith.) 



Fig. 11. Opalescent (Chalcedony. 



(Cat. No. 29683, U.S.N.M. San Mij;uel Island, California. Stephen Bowers.) 



Fig. 12. White Quartz. 



(Cat. No. 6443, U.S.N.M. Farniingdale, Queens County, Ni-w York. J. C. ^lerritt.) 



Fig. 13. Quartzite. 



(Cat. No. 1275, U.S.N.M. Farniingdale, Queens County, New York. J. C. Merritt.) 



Fig. 11. White Quartz. 



(Cat. No. 139271, U.S.N.M. District of Columbia. S. Y. Proudtit.) 



