228 CONCHYhlX—DITHYRA. 50. 



Ttirton, British Fauna, p. 162. 



Dorset. Catal. p. 38, tab. 11, fig. 3. 



Dillwyn, Descript. Catal. p. 286. 



Turton, Conch. Diet. p. 2. 

 Anomia Tunica Cepae. Da Costa, p. J 65, tab. ii. fig. 3. 



Lister, Conch, tab. 204, fig. 38. 

 Mus. nost. On most rocky coasts. 



Shell growing to nearly three inches in diameter, often produced 

 at one side, irregularly wrinkled and plaited ; in the full grown 

 state rough and scaly on the outside, which is dirty white and 

 brownish : beak terminal ; the inside rich perlaceous, mostly 

 white but often mixed with a greenish or dirty brown stain : 

 operculum oval, large, thick, rough. 



Young shells are very irregular and generally angular at tiie 

 margin, with the undulations putting on the shape of ribs or 

 scaly folds, always preserving a rough surface, and of a yellowish 

 or tine purple color; and when fixed to bivalves, especially the 

 Pecten, partaking the figure and marks, as in our fig. 1. 



<>p«. Anomia testa ohovatd planiusculd scahrd, intus rosed. 

 ^' Shell oboval flattish rough, rosy red within. 



Tab. nost. 18, fig. 4. young. 

 Anomia Cepa. Linn. Syst. Nat. p. 1151. 



Ginelin, Syst. p. 3341. 

 Tnrton, Linn. Syst. iv. p. 281. 

 Chemnitz, viii. p. 85, tab. 76, fig. 694, 695. 

 Dillwyn, Descript. Catal. p. 287. 

 Mus. nost. Rocks in Torbay. 



