GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONK. 23 



Geraniales : 



Malpigliiaceae — 



Hiroea olig ocaenica, new species. 

 Banisteria praenuntia, new species. 

 Euphorbiaceae — 



Hieronymia lehmanni Engelhardt? 

 Sapindales : 



Sapindaceae — 



Schmidelia bejucensis, new species. 

 Thymeleales : 

 Lauraceae — 



M espilodaphne culeorensis, new species. 

 Myrtales : 



Myrtaceae — 



Calyptranthes gatunensis, new species. 

 Melastomataceae — 



M elastomites miconioides, new species. 

 Ebenales : 



Ebenaceae — 



Diospyros macdonaldi. new species. 

 Rubiales : 



Rubiaceae — 



Rondeletia goldmani, new species. 

 Rubiacites ixoreoides, new species. 

 Fern fragments of Acrostichum. 

 Palm rays. 



SYSTEMATIC PALEOBOTANY. 



PTERIDOPHYTA. 

 Order FILICALES. 



FERN FRAGMENTS OF ACROSTICHUM. 



The material from the Culebra formation, one-fourth mile south 

 of Empire Bridge, contains several obscure fragments of large simple 

 fern pinnules with reticulate venation strongly suggestive of Acros- 

 tichum, but too incomplete for identification. The genus now prin- 

 cipally represented by the cosmopolitan tropical tidal marsh species 

 Acrostichum aur&um is abundant in the Eocene and Oligocene of 

 both America and Europe, and is especially characteristic in the 

 Jackson, Catahoula, and Vicksburg of our Gulf States. 



