692 MR. A. W. WATERS ON MEMBKAJSTIPOEID^. 



Fig. 5. Chaperia annulus, Manz., var. hilaminata, nov. X 25. 

 5a. Do. Mandible. X 85. 

 &.' MembraniiMra capriensis, sp. nov. X 25. 



7. Membranipora temdrosfris, Hincks. Operculum. 



8. Chaferia annulus, Manz., var. hilaminata, nov. Operculum to ovicelL 



X85. 



9. Do. Operculum to zooecium. X 85. 



10. Chaperia acanthina, Quoy & Gaimard. Operculum. X 85. 



11. Membranipora lineata {L.) ' Challenger ' Station 75, Azores. One of 



the specimens described as M. albida. x25. 



12. Membrani'pora curvirostris, Hincks, var. ' Challenger ' Station 172, 



Nukalofa. The other specimen described as M. albi da. X 25. 



13. Membranipora incrustans, nom.nov. 'Challenger' Station 135a, Inac- 



cessible Island. Described as Membranipora crassimarginata, var. 

 incrustans. x 25. 



14. Membranipora scidpta, MacG., var. cuciillata, nov. X 25, 



15. Membranipora jxrfragilis, MacG. Avicularian mandible. X 85. 



16. Do. Lateral wall showing rosette-plates. X 25. 



17. Do. Distal wall showing rosette-plates. X 25. 



18. Memh^anipora elizabethiensis, sp. nov. Distal rosette-plates, X 25. 



19. Do. X 25. 



Plate 48. 



Figs. 1, 2. Membranipora tehnelcha, d'Orb., var. intertidjercidata, nov. X 25. 

 Fig. 3. Membranipora nitens, Hincks. Dorsal view, interior surface, showing 

 comb-like process. X 50. 



4. Do. Lateral view. X 50. 



6. Do, Comb-like process. X 50. 



6. Membranipora tehuelcha (d'Orb.). From Angola. Front view. X 50. 

 6a. Do, Distal wall, showing rosette-plates. X 85. 



7. Do. Dorsal view, interior, showing spines. X 50. 

 7 a. Do. Spine more magnified. 



8. Do. Lateral rosette-plates. X 12. 



9. Membranipiora lineata, L. Dorsal surface, showing distal and lateral 



pore-chambers, with spines within the chambers. X 85. 



10. Flabellaris roborata (Hincks). Dorsal surface. X 25. 



11. Do. Lateral view, showing rosette-plates. X 25. 



12. Menipca triseriata. Busk. Do. X 25. 



13. Memh'anipora imbricata (Busk). From Port Elizabeth. Showing the 



" hatchet-shaped avicularian process " over one zooecium ; the others 

 are broken away, and the two rosette- plates into the avicularian 

 chamber are seen. X 50. 



14. Membranipora Lacroiccii, Aud. Dorsal surface. X 25. 



15. Do. Operculum. X 85. 



16. Membranipora Mans, Hincks. Operculum. X 85. 



17. Membranipora membranacea, L. Operculum. X 85. 



