Plate XX. 

 All the figures on this Plate are enlarged. 



1. Membranipora Flemingii^ p. 245. 



2. Membranipora lineata, p. 242. 



3. Micropora coriacea, p. 247. 



4. Cribrilina punctata, p. 249. 



5. Cribrilina Gattyse (after Landsborough); p. 251. 



6. Membraniporella nitida, p. 251. 



7. Microporella ciliata, p. 253. 



8. Microporella impressa, p. 254. 



9. Chorizopora Brongniartii, p. 256. 



