ART. 16. NEW FEESH WATER MUSSELS — MARSHALL. 



EXPLANATION OF PLATES. 



Plate 1. 

 AH figures except 5 and 10 reduced one- third. 

 Fig. 1. DipJodontites cookci, new species. Right valve. 



2. Monocondylaea felipponei, new species. Left valve. 



3. Diplodontites cookeU new species. Left valve. 



4. Diplodon arcuattis, new species. Right valve. 



5. Anodontites colomUcnsis, new species. External sculpture X about 0. 

 • G. Diplodon arcuaUis, new species. Left valve. 



7. Diplodontites cookei, new species. Left valve. 



8. Diplodontites cookei, new species. Right valve. 



9. Anodontites pittieri., new species. Right valve. 



10. Diplodontites cookei, new species. External sculpture X about 2-1. 



11. Anodontites pittieri, new species. Left valve. 



12. Diplodon trivialoides, new species. Right valve. 



13. Monocondylaea felipponei, new species. Right valve. 



14. Diplodon triviaUidcs, new .species. Left valve. 



Plate 2. 

 All figures reduced oue-tbird. 

 Fig. 1. Diplodon suh':-iilin(lricns. new species. Left valve. 



2. Diplodon suicylindricus, new .species. Right valve. 



3. Diplodon trivialoides, new species. Left valve. 



4. Monocondylaea felipponei, new species. Left valve. 



5. Diplodon trinialoides, new species. Right valve. 



6. Diplodon suhquadratns, new species. Left valve. 



7. Diplodon arcuatiis, new species. Left valve. 



8. Diplodon suhqnadratus, new species. Right valve 



9. Anodontites pittieri, new species. Left valve. 



10. Diplodon arena tus, new species. Right valve. 



11. Monocondylaea felipponei, new species. Right valve. 



12. Anondontites jnttieri, new species. Right valve. 



13. Anondontites colomhiensis, new species. Left valve. 



14. Anodontites colomhiensis, new species. Right valve. 



Plate 3. 

 All figures reduced one-third. 

 Fig. 1. Diplodon suhcylindricns, new .species. Right valve. 



2. Diplodon subcyUndricus, new species. Left valve. 



3. Diplodon arcnatus, new species. Dorsal view. 



4. Diplodontites cookei, new species. Dorsal view. 



.5. Anondontites colomhiensis, new species. Dorsal view. 



6. Anondontites pittieri, new species. Dorsal. 



7. Monocondylaea felipponei, new species. Dorsal view. 



8. Diplodon suhquadratns, new species. Right valve. 



9. Diplodon suhquadratus, new species. Left valve. 



10. Diplodon suhquadratus, new species. Dorsal view. 



11. Diplodon suhcylindricus, new species. Dorsal view. 



12. Diplodon trivialoides, new species. Dorsal view. 



33. Anodontites colomhiensis, new species. Right valve. 

 14. Anodontites colomhiensis, new species. Left valve. 



