U w 



Fig. 434. — Eocene Molluscs: Gastropods: a, Fusus (?) interstriatus Heilprin; 

 b, Mitra potomacensis Clark and Martin; c, Pleurotoma tysoni Clark and Martin; 

 d P potomacensis Clark and Martin; e, Scala potomacensis Clark and Martin; 

 Tornatellcea bella Conrad; g, Turritella mortoni Conrad; h, Lunatia marylandica 

 Conrad. Pelecypods: i, Glycymeris idoneus (Conrad); j, Dosiniopis lenticu- 

 laris (Rogers); k and I, Corbula aldrichi Meyer; m and n, Protocardia levis Conrad; 

 o and p, Venericardia marylandica Clark and Martin; q, Modiolus alabamensis 

 Aldrich; r, Leda parilis (Conrad) ; s, Lucina aquiana Clark; t, Crassatelhtesala- 

 jormis (Conrad) ; u, Ostrea compressirostra Say; v, Nucula ovula Lea; v), Pecten 

 choctawensis Aldrich. (After Maryland Geological Survey.) 



