PROTOCOCCACE/E 



PL. 13. 





l.a. 



1. 1. x 400. 



i.e. 



i. <Polyedrium gigas. Wittr. 



8. *Polyedrium tetrahedricum. flag. 



5. Bcenedesmus obtusus. Jtfey. 



7. Soenedesmus antennatus. 



Q. *Polyedrium> longispinum. (Peril/. 



. "Polyedrium enorme. (DIjary. 



6. Bcenedesmus aoutus. Jey. 



tf. Scenedesmus quadrioauda. l^reb. 



