TAB. XXX. 



Fig. I 



1 . Pholadoniya hesterna, p. 266. From Coralline Crag, Ramsholt. \ 



r, hinge ; d, portion of shell magnified to show the granulated or shagreen | 



surface. j 



2. Corbula complanata, p. 275. From Red Crag, Sutton. 



3. Corbula striata, p. 274. From Coralline Crag, Sutton. j 



4. Corbula rosea ? p. 275. ,, „ 



5. Pororaya granulata, p. 268. ,, „ I 



(',/, hinge of both valves magnified, to show the fosse for internal ligament. 



6. Neaera cuspidata, p. 273. A fragment only. The outline is imaginary. From 



Coralline Crag, Sutton. i 



7. Neaera jugosa, p. 272. The line denotes the natural size. From Coralline ('rag, | 



Sutton. I 



8. Pholas cylindrica, p. 295. From Red Crag, Walton Naze. j 



(/, accessory valve, probably of this species. 



9. Pholas crispata, p. 296. From Red Crag, Walton Naze. 



10. Pholadidea papyracea, p. 298. Figured from two fragments connected by an 



outline. From Coralline Ci'ag, Sutton. 



1 1 . Gastrocluena dubia, p. 292. From Coralline Crag, Sutton. | 



c, incrassated portion of the neck of its flask-like envelope. ' 



(i, represents the siphonal apei-tures. ,| 



12. Teredo Norvagica, p. 300. From Coralline Crag, Sutton. 



c, posterior portion of tube, showing cameratcd partitions. 



(I, fragment of a thick tube ; natural size. • 



