64 UNIVERSITY MUSEUM ANTHROPOLOGICAL PUBLICATIONS VOL. VI 



seem to have been uniform. The mean diameter of the bore 

 was 1.4 cm. Outside of a single specimen with an unusually 

 large bore, the variation in nineteen specimens was not over 

 .2 cm. The variation in diameter at the two ends was not 

 over .3 cm. which is the more remarkable as a number of the 

 specimens have been bored from both ends. The maximum 

 length of the centrum, that part of the bannerstone surround- 

 ing the boring, was 7.7 cm., and the minimum 4.2. The average 

 length was approximately 6 cm. The width of the centrum 

 was remarkably uniform throughout the series, 2.3 cm. in four 

 specimens, 2.2 cm. in five other specimens and 2.4 cm. in three, 

 all of varying size. The thickness of the wings was also remark- 

 ably uniform; 1.2 cm. in five specimens, 1.3 cm. in four others, 

 1.1 cm. in two, and 1 cm. in two. The wings of No. 5 were 

 "only .9 cm. in thickness. In outline and spread of wings the 

 bannerstones varied considerably, from an extremely large 

 specimen with a spread of 15 cm. to one of three small specimens 

 averaging 7 cm. As to outline, they may be divided into two 

 main groups, the pick-shaped and the square ended (see plates) 

 but the individual variation is so great that a separate descrip- 

 tion has been given for each one. 



Plate XXI, 5. The largest of the series. Straight ended 

 type. Rubbed smooth, but not polished. The centrum is 

 evenly rounded and does not project beyond the base of the 

 wings. The wings have been ground to an edge from both 

 sides at the ends, and are not perfectly aligned with each other. 

 It has been drilled from both ends, the bore meeting about 

 one-third of the distance from the top. One side shows stains 

 which may be due to a hide wrapping. 



Plate XXII, 4. Large stone of pick form, smoothly rubbed 

 but not polished. The material has been worked in such a 

 way chat on one side a patch of different colored strata appear 

 at the tip of either wing and on the centrum. The centrum 

 has three well-marked facets on either side, and there are grooves 

 at the base of the wings on both sides. The centrum protrudes 

 very slightly below the wings. The edges of the wings are 



