Vol. IX. 



Plate XXI. 



RoifObl Pru/sicaL Societi/, FfjUnl>iLr^/i. 



11.' e^-a 



' 'il. ' 



^g^ ^'^''"'- 



/ 



R. Kidston, ael. 



M'Favlans !^ Ers1ane,Lith" Eiii'' 



Figs.1-8, CROSSOTHECA FIMBRIATA, mdston., n.s. 



9, Crossotheca Crepini, Zevaer. 



10-12, CYCLOTHECA BISERIATA, Kzd.sbon.. n.s. 



