PLATE XXXVI. 



Figures magnified 375 diameters. 



Page. 

 Fig. 1. Micrasterias fimbriata, semicell, typical form, . . 109 



' -. other semicell, Var. apiculata, . 11" 



" :;. one-fourth cell, Var. Elephanta, . llo 



- 4. " " \ ar. nuda, . . . .110 



Figs. 5, 6. " " two varieties of polar lobes, . Il<> 



7. Mk i:\-m i:i \~ -i i:i [MBRl w \. lias the form of lol>elets, but nol the 



specific number. 



" - Micrasterias simplex, unlike all other forms in the Bimple, 



acute, ultimate division of the lobules, 11<> 



