EXPLANATION OF PLATE 29. 



Leaf-shaped Arrowpoints, Spearheads, or Knives. 

 Class li. 

 Fig. 1. Lead-colored Quartz Porphyry. 



(Cat. Xo. 17999, D.S.N. M. Daysville, Windham County, Connecticut. J. H. Clark. 



Fig. 2. Blue Gray Chalcedony'. 



(Cat. No. 3458-1, U.S.N.M. Akron, Siunniit Coiiuty, Oliio. Tliomas Rhodes.) 



Fig. 3. Argillite. 



(Cat. No. 19365, U.S.N.M. Trenton, New Jersey. Dr. C. C. Abbott.) 



Fig. k Rhyolite. 



(Cat. No. 350U9, U.S.N.M. Cata\vl):i County, North Carolina. J. T. Humphreys.) 



