PLATE XXXVIII. 



Figures magnified 375 diameters. 



PAGE. 

 Figs. 1, 2. MICRASTERI AS ROTATA, two forms, .... 120 



Fig. 3. " " Var. simplex, . . 120 



" 4. MIORASTKRIAS DENTicuLATA, circular form, . . .120 



" 5. more oblong in outline, . 120 



" 6. " larger variety, near M. angnlosa 



of Reinsch, . 120 



Figs. 7, 8. " " semi-cells of two smaller forms, . 120 



