EXPLANATION OF PLATES 



Plate 1 



Fas* 

 Fig. 1. Aetea truncaia Landsboiongh, 1852 51 



Specimen incrusting a shell; X 20. 

 Albatross Station D. 2405, Gulf of Mexico. 



2. Aetea sica Couch, 1844 51 



Creeping portion of zoarium; X 20. 



Albatross Station D. 2672, Atlantic, east of Georgia. 



3. Levinsenella hrasiliensis Busk, 1884 26 



A branch with ectocyst and ovicells preserved; X 20. 

 Albatross Station D. 2117, Caribbean Sea. 



4. Nitscheina membranacea Linnaeus, 1766 18 



Specimen vAth ectocyst, deformed in drying; X 20. 



Albatross Station D. 2782, off Chili, South America. 



5,6. Acanthodesia savarti Savigny-Audouin, 1826 14 



5. Surface of zoarium, X 20, showing the characteristic 



serrate denticle. 



6. Tangential section illustrating structure of zooecial 



walls; X 85. 

 Albatross Station D. 2405, Gulf of Mexico. 

 7-9. Cwpuladria canariensis Busk, 1852 15. 



7. Young zoarium, X 20, illustrating central zooecia. 



8. Marginal zooecia; X 20. 



9. Inner face without ectocyst, showing the large pores; 



X 20. 

 Albatross Station D. 2405, Gulf of Mexico 



166 



