Plate 9 



Page 

 Figs. 1-4. Schizopodrella incrassata, new species 93 



1. Fragment of a colony with two coalescent fronds; X 6 



2. Group of ovicelled zooecia in the middle of a frond; 



X 20. 



3. Young zooecia at the extremity of a branch; X 20. 



4. Zooecia viewed by transparency, X 85, showing the 



tremopores and #he frontal structure. 

 Albatross Station D. 2405, Gulf of Mexico. 



5. Gemelliporidra aculeata, new species 102 



The incrusting zoarium; X 20. 



Fowey Light, 15 miles south of Miami, Fla. 



6. Hippodiplosia pertusa "Espev, 1794: 106 



Incrusting specimen with several ovicelled zooecia. Some 



of the cells have preserved their opercula; X 20. 

 Albatross Station D. 2362, east of Yucatan. 



7. Hippoporina cleido stoma ^mitt, 1873 104 



Incrusting specimen showing the variations of the aper- 

 ture and the avicularia; X 20. 

 Albatross Station D. 2405, Gulf of Mexico. 



8. Hippadenella floridana, new species 105 



Incrusting specimen, X 20, showing the median avicular- 

 ian chamber. The thick ectocyst hides the areolar pores. 

 Cedar Keys, Fla. 



9. Hemiseptella denticulata Smitt, 1872 62 



A specimen, X 20, exhibiting some deformed zooecia. 

 Punta Rosa, Fla. 

 174 



