76 MOBTAES AND PESTLES. 



dark sandstone, with the bottom curved. The surface is smoothed both on 

 the inside and out. The rim is slightly undulating, and has nine grooves 

 for ornaments, such as we have noticed on several of the preceding speci- 

 mens. 



This mortar measures, in greatest diameter, 13 inches; height, exte- 

 riorly, 7.3 inches ; depth of vessel inside, 5.2 inches ; breadth of rim, 1 

 inch. 



An example, of nearly the same size, is of regular form, with rounded 

 bottom, and made of medium hard sandstone. The edges are undulatinsr, 

 without any well-defined projection of the rim. 



This specimen measures, in greatest diameter, 13 inches; height, exte- 

 riorly, 8 inches ; depth of vessel inside, 5.5 inches ; breadth of rim, 1 to 

 1.5 inches. 



An interesting specimen, made of very hard sandstone, is noticeable for 

 its great regularity of shape, and in having nine depressions, each about 

 two inches in length, on the rim, which is slightly cut underneath on the 

 inside. 



The measurements of this mortar are : Greatest diameter, 12.5 to 

 12.75 inches; height, exteriorly, 7.1 inches; depth of vessel inside.. 5.1 

 inches; breadth of rim, 1 inch to 1.25 inches. 



One example, showing perhaps a greater care in the finish than is 

 usual among the larger sizes, is made of fine-grained, hard sandstone. It is 

 regular in its shape, with surface evenly pecked. The rim projects inward 

 slightly, and is flat and even. 



The measurements of this specimen are : Greatest diameter, 12.7 

 inches ; height, exteriorly, 8 inches ; depth of vessel inside, G.3 inches ; 

 breadth of rim, 1 inch. 



The description of the above specimen will apply very well to another 

 example which is nearly of the same size, but has a smaller flattened base. 

 It is of dense granitic rock, regular in shape, and has the characteristic 

 pecked surface. 



The dimensions are : Greatest diameter, 12.5 inches ; height, ex- 

 teriorly, 9.1 inches ; depth of vessel inside, 6.2 inches ; breadth of rim, 1 

 inch. 



