906 



REPORT OF NATIONAL MUSEUM, 1897. 



CLASS C. — LONG, NAUIJOW HLADES W ITU STKAKJIIT, PAUALLKL KDGES, SHARP POINTS, 

 IJASE CONCAVE, STRAIGHT, OR CONVEX. (Plate 31.) 



■fM 



'Wl 



mT^ 



iv 





rr^ 



This class accommodates the long, narrow blades 

 from the Pacific coast. This va- 

 riety can be studied in Plate 31, 

 leaf-shaped, Class C. Their sides 

 and edges are straight, and par- 

 allel with each other, or nearly 

 so. The convex deflection from a 

 straight line by which the j)oiut 

 is formed, may be abrupt or gen- 

 tle according as the point is 

 madebluntor tapering. The base 

 may be either concave, straight, 

 or convex; there seems to have 

 been no regularity concerning it. 

 In every case it is made by the 

 regular chipping. The speci- 

 mens vary greatly in length and 

 width, but all are extremely 

 thin, being from one-eighth to 

 three- eighths, never more than 

 one-half inch. The difference 

 between width and length is 

 greater than in any other class. 

 The specimens on the plate show 

 the following extremes: No. 1,8^ 

 by l|byi\ inches; No. 7,3by§by 

 ,\ inches; No. 8, Sf by ,\ by ,\ 

 inches ; No. 13, 1 J by ^ by ^ inches. 

 The materials of the imple- 

 ments of this class are agate, 

 chalcedony, iiint in its purer 

 condition, obsidian, and similar 

 fine material. These materials 

 are susceptible of delicate chip- 

 ping, and the prehistoric work- 

 men have emiiloyed their oppor- 

 tunity with the result of elegant 

 and beautiful specimens. The usual remark is to be made as to their 



*J 



:u 



NM 



rJ 



Fig. 124. 



NEW CALEDONIAN JAVE- 

 LIN (MODERN). 

 Sir John Lubbock, ** Prehistoric 



Times." a, ^ natural size; !>, .1 



natural size. 



Fig. 125. 



LEAF-SHAPED IMPLEMENT OF 

 BROWNISH-GRAY JASPER, 

 ■WITH CONCAVE BASE AND 

 PARALLEL EDGES. 



Santa Barbara County, 



California. 



IM vision 1, Class C. 



8»-xl2xg. 



Cat. No. 2ira2, II. S.N. M. 



