10 



SHELL GALLEEY. 



Fig. 3. 



1. Radula of the Common British. Eock-Limpet (Patella vulgata), natural 



size. 



2. Two transverse series of teeth: a, median teetli; 6, laterals; c, uncini or 



marginals. 



Fiff. 4. 



The Common Eock-Limpet (Patella vulgaia). British. 



1. Animal: a, foot; h, fringed mantle; c, tentacles; d, mouth; e, eyee ; 



/, gills. 



2. Side view of shell, showing the impression or scar of the attachment - 



muscle, g. 



3. Upper surface of the shell. 



