134 



PHYSIOGRAPHY. 



Pyroxene. 



Fig. 856. 



Fig. 357. 



IM 



M 



Munroe, (N. Y.) yla, (Piedmont.) 



Fig. 348. Primary form, having the obtuse lateral edges? 

 and the lateral angles, truncated. M on r = 133 35'. P 

 on s =150 2'. s on s --=120 38'. (dihexaedre. H.) 

 Fig. 349. The same, having the lateral solid angles more 

 deeply truncated, and the acute lateral edges truncated. 

 M onZ = 136 15'. 5on/ = 13S48 / . (triunitaire. H.) 

 Fig. 350. The primary form, having the acute solid angle, 

 the .obtuse, ajid the acute, lateral edges, truncated. P 

 on t =148. r on t =. 106 6'. (quadrioctonal H.) 

 Fig. 351. Fig. 349, with the acute solid angles replaced 

 by single planes, n on r =90. Fig. 352. r on t = 106 

 6'. w6n w=131 8'. # on r^=126 36'. M on a? =-134 

 17'. Fig. 353. M on o = 145 9'. o on r = 118 59'. 

 o on o =95 28'. .r on m =133 30'. Fig. 355. i on I 

 = 139 r. i on i -81 46'. (epemeride. H.) Fig. 

 356. r on 5 = 103 59 7 . (octo duo decimal H.) Fig. 357. 

 o on 5 = 156 39 7 . (stenonome. H.) 



Cleavage, parallel with M, rather perfect, but interrupt- 

 ed ; also with r and /, and sometimes parallel with s. In 

 some varieties, it is eminent in the direction of P. Frac- 



