PLATE XX XVII. 



Figures magnified 375 diameters. 



l"iL r - I.- Micbasterias Km nil. 11. two forms, 

 Fig. ".. lateral view, 



Figs 1 5 Micbasterias laticeps, Af. dispute, Wood, 



Fig. 6. Mn r isi 1 .1:1 lb B ltleyi, 



Figs. 7, 8. Micrasterias pinnatifida, two forms, 

 Fig 9 " " Var. inflataj 



10. Micrastebias Mahabuleshwabensis, 



11. Micrastebias psetjdofur ita, Var. minor, 



" 12. Micbasterias expansa, 



