154 BOTANICAL GAZETTE [FEBRUARY 
3. The archegonial chamber is unusually deep, and the arche- 
gonia are of moderate size. 
4. The embryogeny resembles that of Cycas and differs from 
that of Zamia and Ceratozamia. 
5. The species, which represents the nearest approach to the 
mesozoic Bennettitales, is in immediate danger of extinction. 
UNIVERSITY oF CHICAGO 
