PLATE XL. 



FIG. 



1. RHYNCHOPORA BISPINOSA, p. 385; showing marginal 

 cells and the uncinate process. 



2 



3. , with the oral avicularium. 



4. , with aviculiferous mamillse. 



5. , outline of zocecium, showing the lateral 



processes. 



6. SCHIZOPORELLA CRISTATA, p. 254. 



6. - , primary cell. 



7. SCHIZOPORELLA BIAPERTA, p. 255. 



8. , more highly magnified. 



9. , showing oo3cia and aviculiferous mamillse. 



