PLATE XX. 



Fig. 147. Rhizophysa Eysenhardti Ggbr. (Cat. 20 A.). Natural size. 



Fig. 148. Batliypliysa Sibogae nov. spec. (Cat. 27). Natural size. 



Fig. 149. Pteropliysa (Batliypliysa) Studeri nov. spec. (Cat. 6). A lateral view of its pneumatophore. The 



pneumatocodon entirely split open (as far as the porus). Apically part of its wall has been cut 



away, to show the bunch of hypocystic villi. 



