EXPLANATION OF PLATE 30. 



Leaf-shaped Arrowpoints, Spearheads, or Knives. 



ClasH li. 

 Fig. 1. White Chekt. 



((;at. No. 99312, U.S.N.M. Boone County, Mi.ssonri. U. W. Clemens.) 



Fig. 2. Quartz Porphyry. 



(Cat. Xo. 36912, U.S. .N'.M. Catawba County, North Caroliua. J. T. Huiuplirey.s.) 



Fig. 3. Yellow Jasper. 



(Cat. No. 98438, U.S.N.M. (Chenati Mountains, Presidio. Te.xas. T. I;. .Stcw.irt.) 



Fig. 4. Pinkish- White Flinty Chert. 



(Cat. No. 99336, U.S.N.M. Boone County, Missouri, (i. AV. Clemens.) 



Fig. 5. Dark-Brown Flinty Chert. 



(Cat. No. 22173, U.S.N.M. Cattaraugus County, New Tork. Mrs. L. N. Wriglit.) 



Fig. 6. Fine Chert, Color ok Beeswax. 



(Cat. No. 15753, U.S.N.M. San Miguel Island, Calitoruia. W. (1. Har/ord.) 



F'g. 7. Bluish-Brown Cherty Flint. 



(Cat. No, 42960, U.S.N.M. Paxton, Sullivan County, Indiana. J. W. Spencer.) 



Fig. 8. Gray Chalcedonic Flint. 



(Cat. No. 8234, U.S.N.M. Ohio. J. H. Devereux.) 



Fig. 9. P^ine-Grained Quartzite. 



(Cat. No. 8563, U.S.N.M. Mound near Fort Wartswortb, Dakota. Dr. J. A. Comfort, 

 U.S.A.) 



Fig. 10. Bkilliant-White Chalcedony. 



(Cat. No. 29683a. U.S.N.M. San Miguel Island, California. Stejihen I'.owers.) 



Fig. 11. Shining-Pinkish Chalcedony. 



(Cat. No. 29685, U.S.N.M. San Miguel I.sland, California. Stejilicn Bowers.) 

 F'ig. 12. Whitish-Gray Opalescent QuAinz. 



(Cat. No. 29G836, U.S.N.M. San Miguel Island, California. Stei)lien I'.ow.-rs.) 



Fig. 13. liLACK Basalt (f). 



(Cat. No. 157C0, U.S.N.M. San Miguel iMlaiid, ( alifoniia. W. (i. Harfi.nl.) 



