a New Mineral from Peru. 



201 



apply to the pure patronite but to some intermediate 

 product of alteration. It is believed that Hillebrand's 

 analysis of patronite was made on partly altered material. 



Crystal Form of Melaxoyaxadite (by C. Palache). 

 System Monoclinic. 



Axial Eatio a : b : c=0A737 : 1 : 0.5815 /?=88° 371// 

 p = 1.227 c lo = 0.581 ^ = 88° 37%' 



/ h 



Four crystals were measured on the two-circle goni- 

 ometer. They proved little suited to accurate measure- 

 ment, the prism zone being badly striated and the 

 terminal faces, while apparently bright and plane, giving 



