456 
PETROLOGY: G. P. MERRILL 
Proc. N. a. S. 
ing of the closely crowded pyroxenes with comparatively little, if any, 
interstitial glass. In figure 11, from the Parnallee stone, it will be 
noted the crystals are in some instances slightly curved, their vertical 
axes lying approximately parallel with the circumference of the circle 
FIG. 11 
which forms the border of the section. The appearance is as if the chon- 
drules had been molded by external forces after the crystals had formed 
but while yet in a more or less plastic condition. Again, the pyroxene 
crystals abut sharply against the border and are cut off at the margin as 
FIG. 12 
in the half glassy, porphyritic forms mentioned above, and as shown in 
figures 10 and 11. Occasional forms are met with which have all the 
appearance of fragments, slightly rounded, of holocrystalline granular 
rocks, which as noted later, I believe them to be. 
