PLATE XXIX. 



Figures magnified 500 diameters. 



V\r.r. 



Fig. 1. EUASTBUM INTERMEDIUM, . . .102 



2. '* " transverse view of semicell, . 102 



:;. Var. cuspidatum, . , 103 



Figs. 1. 5. lateral and end view. . L03 



" 6-8. Ki \~n;i u imkmi. three forms, .... 104 



9,10. El \~ii:im didelta, two forms, .... 99 



' 11,12. Bdastbum w-\iim -E. RalMi, .... 99 



