398 PROCEEDINGS OF THE ACADEMY OF [1887. 



Several excursions with my class to the "marl" diggings near 

 Shiloh, Cumberland Co., and the examination of material from an 

 artesian well-boring in Atlantic City (kindly placed in my hands by 

 Mr. Lewis Woolman), enable me to increase this list by about fifty 

 species, of which some four or five prove to be new forms. The 

 following species have been identified from the diggings near Shiloh : 



Ostrea percrassa 



Peden Simiphreysii, var. Woolmani (Heilprin) 



Pecten Madlsonius 



Plicatula densata 



Mytilus inflatus 



Mytiloconcha incurva 



Lithodomus sp. f 



Perna maxillata 



Area centenaria 



Area Marylandica 



Pectuneulus lentiformis 



Nueula ohliqua 



Yoldia limatula 



Astarte distans 



Astarte compsonema 



Crassatella melina 



Carditamera arata 



Carditamera acideata 



Lucina cremdata 



Cardium laqueatum 



Chama congregata 



Venus athleta 



Venus mercenaria f 



Venus {Mercenaria caneellata f Gabb.) 



Mactra lateralis 



Tellina sp. ? 



Teredo sp, ? 



Saxicava parilis f (S. insita f) 



Murex nov. sp. 



Turbinella Woodi 



Fidgur sealariformis 



Cantharus Cumherlandianus 



Nassa trivittata 



Columbella communis 



