130 



RECORDS OF THE AUSTRALIAN MUSEUM. 



in the zones [010, 001] and [100, 001], and are, as a rule, long and 

 very narrow, giving only fair reflections, hence some of them may 

 be merely vicinal in character ; the face (113) is dull, and the re- 

 flection was obtained by cementing a fragment of glass on it ; 

 (112) appears as a small square patch. On crystal iv. there is a 

 dull rounded face, probably (112), but it did not admit of even 

 approximate measurement. The faces (207) and (037) may be 

 vicinal to (103) and (012) respectively, the others are un- 

 doubtedly valid forms. The available information regarding 

 the new forms is tabulated below ; two readings enclosed by 

 brackets are independent determinations made on the same 

 plane. Crystals i., iii., iv. are from the collection of the National 

 Museum, Melbourne ; ii from the Sydney University collection. 



