252 PROCEEDINGS OF THE CANADIAN INSTITUTE. 



The following forms I have observed : 



Cr" 



1. Hexag. 2»'ism — pentay. rhomb, planes. 



^ 



2. Hexag. jjrism — three rhomb, jjlanes. 



3. Hexag. p7'is7n — rhomb, and basal plane. 



4. Hexag. prism — the hemi form predominating, and 

 rhomb, planes. 



0. Heyni hexag. prism — and three rhomb, plaries. 



6. jV.B. — These few figures roughly drawn are simply- 

 given to illustrate the variety of forms occuiTing in 

 these veins. 



A 



v 



8. Hexag. prism. 



