88 Y. KIKUCHI. 



Fig. 7. — The crystals, as in fig. 4, assuming a pseudo-monoclinic form, 

 and showing the mode of attachment of Augite spines (pag. 85) and 

 the symmetrical arrangement of enclosures at both ends of the 

 crystal conforming to the Pyramid i. The black dots on the 

 upper left-hand side, are the minute enclosures of Picotite. 



Fig. 8. — The crystal, placed as in tig. 2, showing the symmetrical 

 attachment of the branching skeleton-crystal of Augite (pag. 85). 



yjtr. 9. — The crystal, as in tig. 2, showing the appearance of sym- 

 metrical Augite-spincs when looked at upon the faceb. This is 

 figured in the position adopted by Tschermak (pag. 75). 



Fig. 10. — The same as in tig. 8, looked at upon the face a, with more 

 thickly-set branching and curved spines. 



Fig. 11. — The same as tig. 10, looked at upon the faceb. 



Fi"*. 12. — The cross section of the Rhombic Pyroxene showing 

 characteristic cleavage-traces, and the difference in character 

 between the inner and the outer portions (pag. 79, 82). 



Fig. 13. — The crystals of Augite developed in glassy rocks. a.-A 

 general habitus of the crystal with longitudinal and transversal 

 stria-, and the terminations ending in threads, b.— The same in 

 parallel-intergrowth with the Rhombic Pyroxene, c. — The cross 

 section of the crystal like a. 



Fig. 14. — Une of the forked terminations of the crystal as in tig. 13 a, 

 magnified . 



Fig. 15. — The micro- crystals of Augite among the glass (pag. 83), 

 having in its middle a small band of the Rhombic Pyroxene. 



Fig. 16. — The same as fig. 15, but disymmetric in form. 



Fig. 17. — The same, peculiarly curved. 



Fig. IS. — The same, showing the typical outline assumed by these 

 crystals. 



Fig. 19. — -The smaller crystals of the Rhombic Pyroxene, having at 



