THE NATURAL ARRANGEMENT. XXX111 



PICROSMINE. 



Gen. I. ATELENE* -PiCRosMiNE. (S.) Lustre dull. 

 H. 2-5... 3-0. G. 2-2... 2-6. 



Sp. 1. Prismatic (S.) Serpentine. 



2. Fibrous (S.) Picrolite. 



3. Prismatoidal (S.) Picrosmine. 



4. Nernaline 41 (S.) Nemalite. 



5. Brittle (S.) Kerolite. 



6. Glyptic (S.) Figure Stone. 



SPAR. 



Gen. I. SCHILLER-SPAR. (M.) Cleavage monotomous. 



H. 3 5... 5-0. G. 2-6... 3-3. 

 Sp. 1. D i a t o m o us (M.) Schiller Spar. 



2. H emi-pr i sra a tic (M.) Bronzite. 



Gen. II. DISTHENE-SPAR. (M.) H. 5-0... 7-0. G. 

 3-0... 3-7. 



Sp. 1 . Prismatic (M.) Kyanife. 



2. Prismatoidal (S.) Spodumene. 



Gen. III. DYSTOME-SPAR. (M.) H. 5-0 . . . 7-0. G. 

 2-8... 3-0. 



Sp. 1. Prismatic (M.) Datholite. 



2. Pyramidal (S.) Gehlenite. 



3. Periotomous (S.) Edingtonite. 



^gr, imperfect; in allusion to the want of regular 

 forms in the genus. 



4 * NSjfJux, a thread^ from the fibrous structure. 



D* 



