Mr Solly, On some minerals from Switzerland. 277 



On some minerals from the Binnenthal, Switzerland. By 

 K. H. Solly, M.A., Downing College. 



[Read 26 October 1903.] 



(a) A new mineral appearing in small crystals of a cochineal 

 red colour, with a vermilion streak, crystallizing in the .rhombic 

 system, cleavage (100) highly perfect. Mr Hutchinson found As, 

 S and Pb. 



(b) A new sulpharsenite of lead closely allied to liveingite, 

 crystallizing in the oblique system, the plane of symmetry is 

 parallel to the cleavage plane. 



(c) A new sulpharsenite of lead closely allied to rathite, 

 crystallizing in the oblique system, the axis of symmetry is parallel 

 to the zone axis of the principal prism which exhibits numerous 

 fine oblique striations ; the crystals are twinned about (100) the 

 cleavage plane. 



(d) A new mineral belonging to the mica group of an 

 emerald green colour, but crystallizing in the anorthic system. 



(e) Hyalophane, three new planes have been observed, viz. 

 (380) (212) and (211). 



(/) Albite in simple crystals. This mineral has not been 

 found before at the Legenbach quarry. 



All the above minerals were obtained from the Legenbach 

 quarry. 



(g) Anatase, some very fine crystals were found on the 

 Ofenhorn this summer, the (313) plane is very large. Some 

 highly modified crystals were also obtained from this mountain 

 last summer. Five new forms were observed. 



