348 



Canadian Record of Science. 



tion it is found that they are for the most part quartz, in 

 fact arms of quartz can in many places be seen running 

 into the epidote crystals from adjacent quartz grains, the 

 arm and the external portion of the grain belonging to the 

 same individual. In other places, however, these little arms 

 were found to consist of plagioclase and to be continuous 

 with the plagioclase associated with the epidote in the same 

 manner as in the case of the quartz described above, prob- 

 ably some of them may also be orthoclase. Three of these 

 epidote crystals are represented in outline in Fig. 1, (Nos. 

 i, ii, iii). They were drawn with the aid of a camera lucida 

 from epidote crystals occurring in the sections of the 

 Wrangell Island granite, [n the second one (No. ii), how- 

 ever, it was found to be impossible to show all the inclusions 

 and little arms, only the largest and best defined being 

 represented, while a number of smaller ones are omitted. 



Figueb 1. 

 i. — Epidote, enclosing Allanite in Granite from Wrangell Island, 

 ii, iii. — Epidote in Granite from Wrangell Island, 

 iv, v, vi. — Single individuals of Muscovite in Granite from Pelly 

 River. 



