EXPLANATION OF PLATE 24. 



Fig. 1. Rude Flint Implement. 



(Cat. No. 98346, TT.S.K^.M. Prehi.storic mine or quarry. Flint Ridge, Licking County, 

 Ohio. Gerard Fowke.) 



Fig 2. Leaf-shaped Implement of Quartz-porphyry. 



(Cat. No. 139026, U.S.N.M. Muucy Valley, west branch of Susquehanna River, Penn- 

 sylvania. J. M. M. Gernerd.) 



Fig. :3. LEAF-SH.4.PED Implement of Ar(;illite (?). 



(Cat. No. 139010, U.S.N.M. District of Columbia, in vicinity of Chain Bridge. Ernest 

 Shoemaker.) 



Fig. 4. Flint Core. 



(Cat. No. 98344a, U.S.N.M. Prehistoric mine or (juarry, Flint Ridge, Licking County, 

 Ohio. Gerard Fowke.) 



Fig. 5. Chipped Flint Disk. 



i. (Cat. No. 15350, U.S.N.M. Cass County, Illinois. Dr. J. F. Snyder.) 



Fig. 6. Flint Core. 



(Cat. No. 98344, U.S.N.M. Prehistoric mine or quarry, Flint Ridge, Licking County, 

 Ohio. Gerard Fowke.) 



Fig. 7. Modern Gunflint. 



(Cat. No. 139130, U.S.N.M. Brandon, England. Edward Lovett.) 



Fig. 8. Large Worked Flint Flake. 



(Cat.No. 99908, U.S.N.M. Grand Pressigny (Indre-et-Loire), France. Thomas Wilson.) 



Fig. 9. Fragment of Flint Flake. 



(Cat. No. 101057, U.S.N.M. Havelse, Denmark. Thomas Wilson.) 

 Fig.s. 10-12. Fr.'S.gments of small Flint Implements. 



(Cat. No. 101058. U.S.N.M. Kitchen-Midden, Havelse, near Copenhagen, Denmark. 

 Thomas Wilson.) 



