Plate 2 



Pass 

 Figs. 1-3. Quairicellaria caraibica, new species 17 



1. Segment showing side with small cells and articulation 



with another segment; X 20. 



2, 3. Two segments exhibiting side with large cells; X 20. 

 Albatross Station D. 2136, Caribbean Sea. 



4, 5. Aplousina tuber osa, new species 21 



4. Portion of the incrusting zoatium with large zooecia and 



showing the two tubercles arranged on each side of 

 the ovicell; X 20. 



5. Specimen with small zooecia; X 20. Some of the 



nonovicelled zooecia are tuberose. 

 Albatross Station D. 2405, Gulf of Mexico. 



6. Aplousina gigantea Canu and Bassler, 1927 20 



The incrusting zoarium showing small endozooecial ovi- 



cells; X 20. 

 Albatross Station D. 2405, Gulf of Mexico. 



7. Membrendoecium strictorostris, new species 23 



Surface of the incrusting zoarium showing ordinary, ovi- 

 celled, and regenerated zooecia and the long narrow 

 avicularia; X 20. 

 Albatross Station D. 2319, north of Cuba. 

 8-11. Hincksina periporosa, new species 22 



8. Portion of the incrusting zoarium in which two zooe- 



ciules are transformed into monstrous zooecia; X 20. 

 Albatross Station D. 2405, Gulf of Mexico. 



9. Ovicelled zooecia showing also zooeciules and interjunc- 



tural pores as well as one regenerated zooecium; X 20. 



10. Ovicelled and normal zooecia showing the arrangement 



of the opesial spines. 



11. Ancestrula and ancestrular zooecia. Calcified and 



regenerated zooecia are present; X 20. 

 Albatross Station D. 2319, north of Cuba. 



167 



