X LIST OP PLATES. 



a byssal cord, passing througli a tole in the beak of the 

 upper valve. 



Plate XIII. 



1. Dentalium entalis, or Tooth Shell. 



2. Chiton emarginatus, Coat of Mail, as attached to the rock. 



3. Hyalcea trispinosa; showing the wing-shaped flaps for swim- 



ming. 



4. Avicula tarentina, as attached by byssus. 



5. Pinna pectinata, with its silky beard or byssus. 



6. Mssurella reticulata. Key-hole Limpet. 



Plate XIY. 



1. lantJiina communis; showing the gelatinous float, with the 



egg-bags hanging underneath. 



2. Haliotis tuherculatus, or Ear-sheU. 



3. Phasianella pullus, "Pheasant." 



4. Trochus cinerarius. 



5. 6, Patella vulgaris, or common Limpet. 



Plate XY. 

 1, ^.Idttorina littorea, Periwinkle of the shore. 

 8. Its operculum. 



4. Lacuna vincta ; showing its divided foot. 



5. Paludina vivipara. 



6. JEulima nitida ; showing the eyes of the animal through the 



glassy shell. 



7. Scalaria Trevelyana. 



