66 



RECORDS OF THE AUSTRALIAN MUSEUM. 



R UTILE. 



Victor Harbour, South Australia. 



(Plate xv., fig. 2.) 



For the opportunity to figure these I am indebted to the 

 Director of the National Museum, Melbourne, who courteously 

 lent some crystals for study. The mineral occurs in felspar and 

 in quartz.' 5 Crystals are comparatively simple, the forms being 

 a, m, k (?), e and s. Twinning on the common law e is 

 frequent, and the figure represents a crystal in which this law is 

 combined with the rarer twin law u(30l); I. in the conventional 

 position (as measured) is twinned to II. on e, and to III. on v. 



Angles : — 



Mouxt Gambier, South Australia. 



(Plate xv., tig. 3.) 



A small collection of crystals in the Mining and Geological 

 Museum, Sydney, was examined, and one typical cr}-stal of 

 7x35 mm. measured. 



•Brown— Cat. 8. Australian Minerals, p. 27, Adelaide, 1893. 



