1896,] natural sciences of philadelphia. 481 



Explanation of Plates. 



Plate XVIII. 



Figs. 1 and 2. Pecten claibornensis Con. 



Fig. 3. Leda reg Ina-jacksonis n. sp. 



Fig. 4 and 5. 3Ieretrix pearlensis n. sp. 



Fig. 6. Tellina eburneojisis Con. 



Fig. 7. Mactra mississipjnensis Con. 



Figs. 8a. Periploma sp. 



Fig. 8b. Periploma, hinge magnified. 



Fig. 9. Eucheilodon creno-carinata Heilpr. 



Fig. 10. Harpa jacksouensis n. s\). 



Fig. 11. Fusus insectoides n. sp. 



Fig. 12. Fusus mortoni Lea var. near earexus Har. 



Fig. 13. Latirus leaensis n. sp. 



Fig. 14. Mazzalina inaurata var. Con. 



Fig. 15. Murex marksi Harris. 



Fig. 16. Monoeeras jachsonlum n. sp. 



Plate XIX. 



Fig. 1. Levifusus branneri Harris X |. 

 Fig. 2. Slphonalia jacksonia n. sp. 

 Fig. 3. Amauropsis jacksoiiensis n. sp. 

 Fig. 4 and 4a. Cyprcea pinguis Con. 

 Fig. 5, 5a, 6, 6a. Cyprcea dalli Aldr. 



Plate XX. 



Figs. 1, 2, 3 and 4. Papillina staminea Con. var. 



Fig. 5. Papillina papillata Con. 



Fig. 6. Astarte smithvillensis Har. X |- 



Figs. 7 and 8. Protocardia virginiana f Con. X I- 



Fig. 9. Pleurotoma vaxighani Har. 



Fig. 10. Cancellaria tortipliea Con. X 3. 



Fig. 11. Cancellaria sylvcerupis n. sp. 



Fig. 12. Murex morulus Con. 



Plate XXI. 



Figs. 1 and la. Pyropsis perula Aid. 



Fig. 2. Latirus imbricatulus n. sp. 



Fig. 3. Sipho erecta Aid. 



Fig. 4. Cyprcea smithi Aid. 



Fig. 5. Solarium huppertzi var. Har. X 2. 



Fig. 6. Solariella sylvcerupis n. sp. 



