28 



REfORPS OP THE AnSTRAfJAN MrSETM. 



Mount liVell, 'rasniaiiia. 



(PI. viii., Hg. 3.) 



According to Petterd^*^' cuprite occurs in some abundance in the 

 neighbourhood of Mount Lyell in finely formed crystals of octahedral 

 liabit attached to or partially embedded in blocks of nodular limonite ; 

 in one of our specimens it is accompanied by native copper. Four 

 ciystals were measured, their habit conforming more or less to that of 

 the drawing ; the octahedron and dodecahedron are well developed, 

 the cube and the trapezohedron w (112) are small, and in addition there 

 ai^e small faces belonging to a new tetrahexahedron /• (405), which was 

 observed five times on one crystal and three times on another, the angle p 

 foi- the face 045 varying between the limits 87° 45' and 88° 40' with an 

 average value 38° 25' (calculated 38° 40'). 



Stanley Copper Mine, Linda, Tasmania. 



(PI. viii., fig. 4.) 



Two hand specimens from this old mine are in the AnstiTilian 

 Museum collection. The matrix is concretionary and stalactitic limonite, 

 and the cuprite is accompanied by crs'stallised native copper. The 

 crystals of cuprite are of dodecahedml habit, almost transparent, and 

 hi'illiant red in colour. In the figured specimen small faces of the cube 

 and octahedron aie present, occasional nanow [>lanes of ii and a probable 

 new triKoctahedron /»' (155) appears as striu^ in the dodecahedral faces 

 running parallel to their inteisections with the octahedral planes. Nine 

 measui*ements of Jl were obtained ; of these the only two reasonably good 



■" Vetterd— Catalogue of the Minerals of Tasmania, p. 61 (Hobart. 1910). 



