PLATE XXXIII. 



Figures magnified 500 diameters. 



Page. 



Fig. 1. EUASTBDM WOLLEI, ... . 108 



" 2. " '' transverse view of semi-cell. . 108 



" 3. " " Var. cuspidatum, . . 108 



Figs. 4, 5. " " lateral and end views, . 108 



" 6-8. EuASTKUM INERME, three forms, .... 115 



" 9, 10. EuASTatrar DroEi-TA, two forms, . . 109 



" 11, 12. EoASTBDM ANSATDM — E. Ralfsii, . . . 109 



