DESCRIPTION OF PLATES. XV 



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 Gattyas (after Landsborough), p. 251. 



6. Membraniporella nitida_, p. 251. 



7. Microporella ciliata, p. 253. 



8. Microporella impressa, p. 254. 



9. Cborizopora Brongniartii, p. 256. 



Plate XXI. 

 All the figures on this Plate, except fig. 9, are enlarged. 



1. Scbizoporella unicornis^ p. 259. 



2. Schizoporella hyalina, p. 266. 



3. Schizotheca fissa (after Hincks), p. 268. 



4. Hippothoa divaricata, p. 269. 



5. RLyncopora bispinosa, p. 271. 



6. Lepralia Pallasiana, p. 272. 



7. Lepralia adpressa, p. 274. 



8. Smittia trispinosa, p. 282. 



9. Cellepora ramulosa^ nat. size (after Couch), p. 291. 



Plate XXJI. 

 All these figures, except 4 and S, are enlarged. 



1. Mucronella coccinea, p. 286. 



2. Mucronella variolosa, p. 285. 



