PLANS OF GEOWTH 



49 



PORCELLANOUS. 



Cornuspira 



Peneroj)Us 



Orhiculina 



Orhitolites 



Alveolina 



Hyaline. 



SjpiTillina 



Operculina 



Heterostegina 



Cjjcloclypeiis 



Fusnlina 



As examples among Species the following are 



