BY W. F. PETIEHl). 79 



gold in 1904. Its weight is 3-328 grains. Specific 

 gravity, 7'847. It has the characteristic pittings 

 and crust of such objects, and is beyond doubt 

 of meteoric origin. Locality, Lefroy. 



12 Leucophanite. — (Silicate of calrium sodium ylau- 



cina with fluorine.) 

 It would appear that this mineral, which has been 

 hitherto overlooked, is fairly abundant at or in 

 the vicinity of the Shepherd and Murphy Tin- 

 Bismuth Mine, Bell Mount, Middlesex. It is 

 closely associated with pyrite, both copper and 

 iron, in the examples which have come into my 

 hands. It crystallises in the orthorhombic 

 system, with a constant hemihedral habit, and 

 twinning is an occasional feature. The crystals 

 are, as a rule, well-developed in clusters on the 

 margin of a spheroid amorphous mass of the 

 substance. They commonly average a centimetre 

 in length, and are consequently recognised with 

 extreme ease. The general mass presents a fairly 

 uniform colour of a somewhat peculiar shade 

 of olive green, with a vitreous lustre 

 and glimmering reflection. The crystals are 

 usually of a rather darker shade. A pronounced 

 character of this mineral is that when heated it 

 becomes highly phosphorescent with a distinct 

 bright light, in which respect it resembles 

 chlorophane. It is about 4 in hardness, with a 

 white streak. To the petrologist this is a find 

 of unusual interest, as the mineral is considered 

 peculiar to the eloeolite-syenites of Southern 

 Norway, the classic locality for this remarkable 

 series of rocks; and this has hitherto appeared 

 to be its only recorded association. The indenti- 

 fication thus tends to show a wider distribution 

 in this island of igneous rocks related to the 

 varied complex so pronounced at Port Cygnet, 

 and which have been fully described from time 

 to time in the proceedings of this Society. 



13 Manganite. — (Hydroioi, ma7iganese sesquioxide.) 



In small bunches of well-formed crystals. Hamp- 

 shire Silver Mine, Hampshire Hills 



14 Minium. — [Lead jjlunihafe.) 



Obtained as small encrusting patches of the usual 

 bright red colour in the superficial workings of 

 the Long Tunnel Mine, Castray River. 



