168 rHYSIOGllAI'liy. CLASS 



* Pr 1 iv (66 12' Pr 



ftr+oo; + 



Char, of Comb. Hemi-prismatic. Inclination of 



p x to Pr -f oo = 87 39'. 

 Combinations. 1. Pr. Pr -f oo. Chessy, France. 



2. Pr. (Pr !)> p r + ^ Chessy. 



3. P oo. &L^i2)-.. (Pr -f oo) 3 . Pr + oo. 



8 



Fig. 63. Bannat. 



4. P _ QD. 5. I. Pr. - 



g g 



Pr -f QD. Fig. 64. Chessy. 



5. P QD. . Pr. ^JTli. 



(Pr + oo) 3 . (Pr + oo) 5 . Pr + oo. Fig. 65. 

 Chessy. 



r p Pr P (Pr 1)' (ftr !) 



T 8" ~2~ "" 



(Pr -f- x) 5 . (Pr + x) 5 . Pr + oo. Fig. 66. 



Chessy. 



Cleavage. (Pr -f oo) 5 perfect, but interrupted by 

 conchoidal fracture. Less distinct, P CD ; 

 imperfect in the direction of Pr. Fracture con- 

 choidal. Surface, P OD sometimes streaked 

 parallel to the edges of combination with 



