BULL. GEOL. SOC AM. 



CLASSES 



113 

 CO 



A X I AL 



ONE AXIS 



RTH A X I AL 



PLANE NORNAL TO AXIS 



3 SINGULAR DIB 



TRICLINIC 



PO L Y A X I A L 



MANY AXES 



AM E B A X I A L 



ALTERN ATI No A XE S 



H E D R AL 



PLANES INTERSECTING IN ONE AXIS 



RT HOHEDRAL 



PLANES COINCIDING WITH AXES 



AM E 8 AH EDR AL 



PLANES ALTERNATING WITH AXJS 



