Plate 12 



Page 

 Figs. 1-7. Gemellipora glabra Smitt, 1873 98 



1. Fragment, natural size and base of a branching colony; 



X 6. 



2. Example; X 20, with ectocyst and opercula preserved. 



3. Extremity of a young branch, X 20, with ectocyst. 



4. Specimen without ectocyst, showing the frontal pores; 



X 20 



5. Ovicelled specimen; X 20, showing the median cicatrix 



of the ovicell. 



6. Longitudinal thin section; X 25. 



7. Transverse thin section through the plane of an aper- 



ture; X 25. 

 Fowey Light, 15 miles south of Miami, Fla., and Albatross 

 Station D. 2405, Gulf of Mexico. 

 8-10 Microporella ampla, new species 



8. Incrusting ovicelled specimen; X 20. 



9. Another portion of the same exhibiting the great var- 111 



iations of the zooecial width; X 20. 



10. Encrusting zoarium, natural size. 



Albatross Station D. 2152, 23^ miles northwest of Habana, 

 Cuba. 



11. Lepralia palliolata, new species 109 



The incrusting type specimen; X 20. 

 Albatross Station D. 2639, Straits of Florida. 



177 



