44 ME. A. W. WATERS ON THE MARINE 



Fig. 6. Scvupocellaria Macandrei. Avicuiarium, X 100. 



7. Do. do. x 85. 



8. Membmnipora quadricornuta, sp. nov., x 25. The distal spines usually stand 



erect, but some are given bent down to show the shape. 



9. /Scrupocellaria tridcntata, sp. nov., X 85. 



10. Do. do. Mandible fitting into the avicuiarium. 



11. Scrupocellaria Macandrei, X 85. Decalcified, showing the position of the ovary (ov.) 



and the testes (£.). 



Plate 2. 



Fig. 1. Schizoporella trichotoma, sp. nov., x 50. 



2. Do. do. x 85. Operculum. 



3. Do. do. x 250. Pores in decalcified membranes of the frontal surface 

 of the zooecia, showing the larger and smaller rings on the inner and outer wall. 



4. Do. do. x 12. Showing the primary zocecium. 



5. Schizoporella oligopus, X 25. 



6. Do. do. x 25. Dorsal surface. 



7. Holoporella pusilla, X 25. 



8. Do. do. X 85. Operculum. 



9. Do. do. X 85. Mandible. 



10. Schizoporella spongites, x 25. Showing ovicell and vicarious avicuiarium. 



11. Do. do. X 85. Showing the oral denticles from the front. 



12. Do. do. X 85. Oral aperture showing the denticles from the interior. 



13. Do. do. X 85. Operculum. From Manaar. 



14. Schizoporella unicornis, X 85. (a) Operculum in the oral aperture from lower 



layer with closure and small tubule; (b) do., with large tubule; (c) do.; 



(d) do., showing connection from the tubule to the distal wall of the zocecium ; 



(e) do., with calcareous covering commencing over the distal part of the 

 operculum. 



15. Do. do. X 85. Operculum. 



16. Do. do. X 25. Zocecium with part of the front wall removed, showing 

 the zocecium of a lower layer in an exactly similar position. 



17. Do. do. X 4. Side view of the zoarium, showing the superimposed la3'ers 

 of the zooecia, with some^ovicells. 



18. Schizoporella viridis. Similar multilateral zoarium, showing the irregular position 



of the layers. From the Red Sea. 



19. Schizojjorella porelhformis, X 25. Showing walls commencing for the next 



layer, and these walls crossing over the opercula. From Port Elizabeth, 

 S. Africa. 

 •20. Do. do. X 50. 



21. Do. do. X 85. Operculum. 



22. Schizoporella unicornis, X 85. Abnormal double operculum. 



Plate 3. 



Fig. 1. Crista tubulosa, X 25. 



2. Crista lincentensis, sp. nov., X 25. Showing long ovicell. 



3. Do. do. X 85. Ooeciostome. 



