OltDEll VI. GENERA AND SPECIKS. 425 



7- PRISMATIC. Prismatic. P = 143 20', 142 40', 53 20'. 

 Cleavage, P + co = 91 0'. 

 H. = 5-0 ... 5-5. 

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



Mesotype. ii. 236. 



8. PRISMATOIDAL. Prismatic. P = 119 15', 114 0', 96 0'. 



Cleavage, Pr + co, eminent. 

 H. = 3-5 ... 4-0. 

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



Stmtoe. ii. 239. 



9. HE MI-PRISMATIC. Hemi-prismatic. Irregular six- 



sided prism of 129 40', 116 20', and 114 0'. 

 Cleavage, Pr + co, very eminent. 

 H. = 3-5 ... 4-0. 

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



Heulandite. ii. 242. 



10. PYRAMIDAL. Pyramidal. P = 104 2', 121 0'. 



Cleavage, P co, eminent. [P + co J imperfect. 

 H. = 4-5 ... 5-0. 

 G. = 2-2 ... 2-5. 



Apophyllite. ii. 244. 



1J. AXOTOMOUS. Prismatic. P=10652',101 37',12034'. 



Cleavage, P co, eminent. Less distinct, ?r + co. 



Pr + co. 



H. = 4-5 ... 5-0. 

 G. = 2-2 ... 2-5. 



Apophyllite. ii. 246. 



Brewsterite. iii. 0. 



Comptonite. iii. 89. 



Gmelinite. iii. 104. 



Levyne. iii. 120. 



Mesolc. iii. 126. 



Mesolinc. iii. 126. 



Sarcolite. iii. 147. 



Thomsonite. iii. \Q2. 



