Plate 23 



Page 

 Figs. 1-3. Bracebridgia subsulcata Smitt, 1873 127 



1. Zoariuin, natural size. 



2. Zooecia, X 20, showing the oral avicularia with point 



toward the top and the zooecial avicularia pointed 

 below. 



3. Interior of zooecia, X 20, illustrating absence of asco- 



pore or spiramen. 

 Albatross Station D. 2405, Gulf of Mexico. 

 4-5. Adeona plagiopora Smitt, 1873 126 



4. Much calcified zooecia, X 20, around a gonoecium. 



5. Ancestrular zooecia of an incrusting specimen; X 20. 

 Fowey Light, 15 miles south of Miami, Fla., B,nd Albatross 



Station D. 2405. 

 6-9. Metrarabdotos unguiculatum, new species 128 



6. Nonovicelled portion of the unilamellar zoarium; X 



20. 



7. Ovicelled and nonovicelled zoecia; X 20. 



8. Interior of an ovicelled colony, X 20. 



9. Tangential section of the frontal, X 85, showing the 



structure of the pleurocyst and the interareolar cos- 

 tules. 

 Albatross Station D. 2363, east of Yucatan. 

 188 



