EXPLANATION OF PLATE 40. 



Peculiar Forms of Arrowpoints, Spearheads, or Knives. 



C/as.s /. 

 Fig. 1. Gkay Flint. 



((Jat. No. 4;j132, U.S.N.M. Mound, Naples, Illinois. J. (r. Henderson.) 



Fig. 2. Obsidian. 



(Cat No 26417 U.S N.M. Sau Miguel Island, California, S. Bowers.) 



Fig. 3. Dark-gray Flint. 



(Cat. No. C2387, U.S.N.M. Jetier.sou County, West Virginia. K. W. Mercer.) 

 Fig. 4. PORPHYRITIC Felsite. 



(Cat. No. 9992, U.S.N.M. Shell heaps, Edmunds. Maine. G. T. Gardner.) 



Fig. 5. Dark-gray Flint. 



(Cat. No. 147751 U.S.N.M. Flint Ridge, Licking County, Ohio, tierard Fowke.) 



Fig. 6. Pale brown Flint. 



(Cat. No. 35.589, U.S.N.M. Greenfield, Missouri. M.E.Harrison.) 

 Fig. 7. Pale-brown Flint. 



(Cat.No. 147750, U S.N. M. Flint Kidge, Ohio.) 



Fig. 8. Pale-gray Flint. 



(Cat. No. 15733, U.S.N.M. .Sau Miguel Island, California. W. G. Harford.) 



Fig. 9. Gray Flint. 



(Cat, No. 145977, U.S.N.M. Flint Kidge, Ohio. Gerard Fowke.) 



Fig. 10. Gray Flint. 



(Cat. No. 32538, U.S.N.M. Pearl Depot, Illinois. Brainard Mitchell.) 



Fig. 11. Gray Flint. 



(Cat.No 15732, U.S.N.M. San Miguel Island, California.) 



Fig. 12. Pink Flint. 



(Cat. No. 32522, U.S.N.M. Pearl Depot, Illinois. Brainard Mitchell.) 

 Fig. 13. Pale-gkay Flint. 



(Cat. No 30127, U.S.N.M. St. Clair County, Illinois. Dr. J. R. Patrick.) 

 Fig. 14. Grayish Flint. 



(Cat.No 29630 U.S.N.M. Sau Miguel Island, California. S Bowers.) 



Fig. 15. White Flint. 



(Cat. No. 173938. U.S.N.M. Southeast Missouri. Bureau of Etlmology, Hilder collec- 

 tion.) 



Fig. 16. White Flint. 



(Cat. No. 98662, U.S.N.M. (Cast). Greene County, Illinois. C. Armstrong.) 



Fig. 17. White Flint. 



(Cat.No 32523. U.S.N.M. Pearl Depot, Illinois. Brainard Mitchell.) 

 Fig. 18. Whitk P"'lint. 



(103(0. Missouri.) 



Fig. 1ft. White Flint. 



(Cat.No. 146840. U.S.N M. Dallas City, Illinois. L.S. Bli.ss.) 



Fig. 20. PiNKLSH Flint. 



(Cat. No. 97485, U.S.N.M. Flint Kidge, Ohio. Gerard Fowke.) 



