EXPLANATION OF PLATE 32. 



Triangular Arrowpoints, Spearheads, or Knives. 



Fi"'. 1. (4REEN CHAL( EDONY. 



'^ (Cat. No. 1804.S. r.S.N.M. WesU'rlv, Wasliiiiuton County, IMioili- lsl;nnl. J. H. Clurk.) 



Fi"'. 2. Greenish Flint. 



(Cat. No. 18057, U.S.N. M. Cuniboilaiid, Provideuce County, IMiodc Island. .1. H.ri;iik.) 



Fig. 3. Yellow Flint. . 



(Cat. No. 1714818, U.S.N.M. Waynesboro, Burkt' County, (ieoi'Sm. Dr. K. Steincr.) 



Fio. I. Gray Flint. , , ^, ^ 



(Cat. No. 6177,11. S.N. M. Stillwater, Washington County. New ^ ork. r ol. K.Jcwctt.) 



Fig. 5. Hlce-black Flint. 



iCat. No. 17U38a, U.S.N. M. Wiiynesboro. (Jcorgia. Dr. Iloland Stcinor.) 



Fig. 6. Light-Gkay Flint. 



(Cat. No. 11107, U.S.N. M. MilniTsville, Guernsey County, Ohio. D. 1 . 1 honijison.) 



Figs. 7, 8. Yellow Flint. 



(Cat. No.s. 1714386. 17U:i8c. U.S.N. M. Waynesboro. Georgia. Dr. Roland Sterner.) 



Fio-. <l. POKPHY'RITIC FeLSITE. 



(Cat.No. 180(50, U.S.N.M. Nantucket Island, Massachusetts. .T.H.Clark.) 



Fi"-. 10. Fine-grained Qtartzite. 



(Cat. No. 180:i4, U.S.N.M. Chilniark, Dukes County, Massachusetts. J. H. Clark. 



Fig. 11. I)ARK-(iRAY Flint. , 



(Cat. No. ;ur)87, U.S.N.M. Bainbridge, York County, Pennsylvania. 1' . G. (xailbraith..) 



Fig. 12. Quartz Porphyry. 



(Cat. No. 18021, U.S N.M. Wickford, Washington County, Khode Isiand. J. H. Clark.) 



Fig. i:5. Light-Brown Flint. 



(Cat. No. 10004, U.S.N.M. Camden County, Georgia. Gen. (;. R. Floyd.l 



Fig. 14. White Quartz. , „ ,„ , 



(Cat. No. 18033, U.S.N.M. Essex, Middlesex County, Connecticut. .I.H.Clark.) 



Fig. 15. Dark-Gray Flint. . ,, , , 



(Cat. No. 113819, U.S.N.M. Kanawha Ccmiity, AVest Virginia. P.ureaiiot Kthiiology. 

 P. W. Norris.) 



Fig. 1«. Dark-Gray Flint. t it ,., , , 



(Cat. No. 18031, U.S.N.M. East Haddon, Middlesex Comity, Conne<li<-ut. ,T . H.Clark.) 



F'ig. 17. Gray' Chert. x- , , , 



(Cat. No. 22175, U.S.N.M Sherid:iii. Chautaiuiua County. New York. Jn. Gould.) 



IMg. 1!^. Black Flint. 



(Cat. No. 18086, U.S.N.M. Mound in Ohio. .1. H. (Uark.) 

 Fig. 19. ^VHITE Flint. 



(Cat. No. 21921, U.S.N.M. Waukegan, Lake (bounty, Illinois. ,J. W Mihier.) 



Fig. 20. Dark-Brown Jasper. 



(Cat. No. 12744, U.S.N.M. Oregon. Paul Schumacher.) 



Fig. 21. Black Flint. 



(Cat. No. 5315. U.S.N.M. Llano County, Texas. A. K. Roessler.) 



Fig. 22. Greenish Flint. 



(Cat. No. 32239. U.S.N.M. Catawba County, North Carolina. J. T. Humphrey.; 



Fig. 23. Variegated Flint, Brown and Gray. 



(Cat. No. 29683, U.S.N.M. San Miguel Island, California, Stephen P.owers.) 



Fig. 24. Gray Flint. 



(Cat. No. 16471, U.S.N.M. Southern Ohio. Dr. C. A. Miller.) 



Fig. 25. Dark Flint. , ,, ., ^ . . 



(Cat. No. 29961, U.S.N.M. Louisburg. Franklin County, North Carolina. 1< . G. Foster.) 



Fig. 26. Brown Jasper. 



(Cal.No. 20275, U.S.N.M. Oregon. Paul Schumacher.) 



Fig. 27. White Chert. 



(Cat. No. 136959, U. S. N. M. Labette County, Kansas. W. S. Hill.) 



