EXPLANATION OF PLATE 31. 



Leaf-shaped Arrowpoints, Spearheads, or Knives. 

 Class C, Pacific (oast. 

 Fig. 1. Opalescent Chert. 



(Cat. No. 21632, TJ.S.N.M. Sauta Barbara County, California. Paul Scbutiiacher., 



Fig. 2. Opalescent Chert. 



(Cat. No. 62484, U.S.N.M. Doa Pueblos, Sauta Barbara (Jouuty, California. Capt. G. M. 

 "Wheeler, U. S. Geological Survey.) 



Fig. 3. Pinkish Slate. 



(Cat. No. 8927. U.S.N.M. West Derby, Veruiout. H. W. Norrls.) 



Fig. 4. Black Chalcedony. 



(Cat. No. 62481, U.S.N.M. Uos Pueblos, Santa Barbara County, California. Capt. G. M. 

 "Wheeler.) 



Fig. 5. Obsidian. 



(Cat. No. 25424, U.S.N.M. San Miguel Island, California. Stephen Bowers.) 



Fig. t). Gray Chalcedony. 



(Cat. No. 171441, U.S.N.M. Burke County, (ieorgia. Dr. R. Steiner.) 



Fig. 7. Brownish Flint. 



(Cat. No. 171441, U.S.N.M. Burke County, Georgia. Dr. R. Steiner.) 



Fig. s. White Chert. 



(Cat. No. 23674, U.S.N.M. Santa Rosa Island, (California. Stephen Bowers.) 

 Fig. it. Black Flinty Chalcedony. Bitumen on stem, evidence of a handle. 

 (Cat. No. 26426, U.S.N.M. San Miguel Island, California. Stephen Bowers.) 



Fig. 10. Yellowish Flint. 



(Cat. No. 171441, U.S.N.M. Burke County, Georgia, Dr. R. Steiner.) 



Figs. 11. Grayish Flint. 



(Cat. Nos. 20516, U.S.N.M. Santa Barbara County, California. Paul Schuiuacher.) 



Fig. 12. Grayish Flint. 



(Cat. No. 2641.5, U.S.N.M. .San Miguel Island. Stephen Bowers.) 



Fig. 13. Grayish Flint. 



(Cat. No. 15761, U.S.N.M. Santa Barbara County, California. Paul Schumacher.) 



