Quarf. Jonrn. Micr. Sci Vol 67, N.S., PI 2S 



t.i: >..:'..•■•:. .*"v. 



.;-''~ " 





>,• ..:v;'s*5' ■' :.v^^v^-'' ■: •• ir--- 







14 



N^' 11 



A 





A/ A/ 

 \ 

 \ 

 \ 



.•>•/ 



/^ 



12 



A 



% 



fr^f%^, 



3 





15 





^ ' 16 



Bishop, del. 



