64 AMERICAN JOURNAL 



H. COARCTATUS. Dentalium coarctatum Lamarck, An. sans. 

 Vert., 2d edition, v., 1838, p. 599. — Miocene of Peidmont. 



H. THALLUS. Dentalium itAaZ/?/^ Conrad, Miocene Foss., 1844, 

 p. 78. pi. xliv., f. 5. — Miocene of Virginia. 



