408 CHARACTERISTIC. CLASS II, 



CHARACTERS 



OF THE 



GENERA AND SPECIES 



OF THE 



ORDERS OF CLASS II. 



I. ORDER. HALOIDE. 



I. GYPSUM-HALOIDE. Prismatic. 

 H. =. 1-5 ... 3-5. 

 G. = 2-2 ... 3-0. 



G. above 2-5 : cleavage in three direc- 

 tions, perpendicular to each other, one 

 of them being less distinct. 



p 



1. PRISMATOIDAL. Hemi-prismatic. __=14352'. In- 

 clination = 9 IT. 



Cleavage, r + co, perfect and eminent. = 66* 



2 

 52'. Pr + co. 



H. = 1-5 ... 2-0. 

 G. = 2-2 ... 2-4. 



Gypsum. ii. 57. 



