LIST OF PLATES 



Plate I. 

 Explanatory of Uni- 

 valves. 



Plate II. 



Explanatory of Bivalves 



and Multivalves. 



Plate III. 



1. Chiton squamosus. 



2. Lepas Tintinnabulum. 



3. L. anatifera. 



4. Pholas Candida. 



Plate IV. 



1. Hinge of Mya trun- 



cata. 



2. Mya truncata. 



3. Hinge of Solen Va- 



gina. 



4. Solen Ensis. 



5. S. radiatus. 



Plate V. 



1. Hinge of Tellina ra- 



diata. 



2. Tellina riigosa. 



3. T. planata. 



4. T. cornea. 



5. Hinge of Cardium 



echinatum. 



6. Cardium edule. 



7. C. Cardissa. 



Plate VI. 



1. Hinge of Mactra Lu- 



traria. 



2. Mactra Stultorum. 



3. Hinge of Don ax Scor- 



tum. 



4. Don ax denticulata. 



Plate VII. 



1. Hinge of Venus con- 



centrica. 



2. Venus Paphia. 



3. V. edentula. 



4. V. liter ata. 



5. Hinge of Spondylus 



G cedar opus. 



6. Spondylus Gcedaro- 



pus. 



Plate VIII. 



1. Hinge of Cham a Gi- 



gas. 



2. Chama Gigas. 



3. Hinge of Arc \gravosa. 



