76 T. HIKI. 



On f. (E. 2.) Small eminences in the shape of isosceles triangles, 

 with curved sides and a pretty acute apex, are produced. Their base is 

 parallel to the edge c:f, while their other two sides are parallel to 

 the edge t:f. Besides, there are observed irregular, ring-shaped 

 markings resembling cracks. The etched figures seen by Pelikan 

 have not been noticed. 



On u. (E. 3.) The etched figure consists of fine parallel strire and 

 some irregular lines across them. 



On o. (E. 4.) Two different kinds of etched figures; namely, tri- 

 angular eminences and rectangular depressions are here produced. 

 The triangular figures are very like those described by Pelikan ; but 

 possess rather curved sides. The same figures are again found in 

 the topaz from Omi. The triangles are equilateral and one of the 

 sides is parallel to the edge o: M. 



On M. (E. 5.) The etched figure observed by Pelikan on this face 

 has not been noticed in our topaz. There are, however, long rectangular 

 eminences parallel to the edge M : M. Besides we find peculiar 

 impressions, whose curved sides face in opposite directions upon the 

 two adjacent faces of M. 



On /. (E. 6.) Small narrow impressions, bounded by straight and 

 curved sides, which seem to be essentially the same as the trapezoidal 

 figures observed by Pelikan. 



On d. (E. 7.) Numerous irregular etched figures are found. 



