zl i:poui;r>s OP the ai'stk-amax ml'shtm. 



Cassiteimif. 

 Pine Mountain, Inverell, X.S.Wales. 



(PI. vi., li.^. 4.) 



From this locality two untwinned crystals wliicli present some 

 i'eatures of interest liave been lateh' acquired. One is Fiagmentaiy, with 

 poor terminations, and dark brown to black in colour witli honey-yellow 

 patches, t.he other measures about. 15 X 1 cm., is donbl}' terminated and 

 almost black. An interesting featui-e is the presence of the base wliich 

 IS a comparatively rare foiin in cassitei'ite. Tlie largest faces belong to 

 the forms /• (230) and .>• (Ill) : the other Forms represented are c (001), 

 '( (100), // (1"20), and - (231), of which a and // are veiy narrow. The 

 base is i-ongh and yielded a very binned reflection, while the prisms are 

 poorlv developed and the measurements obtained from them are 

 approximate only; tlie faces of ,: are smooth and brilliant and give 

 excellent reflections. 



A HO'les : 



Long (Jully, near Tinglia, N.S.Wales. 



(PI. vi., figs. 5, (), PI. vii., ligs. 1, 2.) 



Fi'om Long Gully, thiee miles soutli east of Tinglia, comes a small 

 collectioii of cassiterite crystals, the habit of which is quite unusual in 

 Australian occui'reiu;es and by no means common generally ; they belong 

 to the variety called by (he Cornish miners " needle tin " or " sparable 

 (y sparrowbill) tin," which is cliai-acterised by an acute pyramidal 

 termination. in the Coinish crystals the teiinination is foi-med by faces 

 of r. (821) and (521)-''. Here the steep pyramid is ,r (tig. ()) which is 



-'' Miers — Miiifralo.^y. I'.ioi'. ].. :{H(i. 



