24 



SHELL GALLERY. 



Fig. 12. 



1. Radula of the Common British Rock-Limpet {Patella vulgata), natural size. 



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



marginals. 



Fig. 13. 





The Common Rock-Limpet (Patella vulgata). British. 



1. Animal : a, foot ; b, fringed mantle ; c, tentacles ; d, mouth ; e, eyes ; /, gills. 



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



muscle. 

 Upper surface of the shell. 



