1931] Marine Molluscan Shells of Beaufort 145 



longitudinal ribs throughout with no finer threads between them. The 

 largest has a diameter of 1.25 mm. They are very thick, and look fossil. 

 They may be D. disparile Orbigny. 

 Dentalium agile M. Sars.? 



Sars, Remarkable Forms of Animal Life, p. 34, pi. 3, figs. 4 and 5. 

 Occasional, inside. 

 Dentalium malar a DaU. 



Smooth, very slightly arched, slightly notched above and below with a short, 



wide notch, on convex side prolonged as a wide slit. 

 Occasional, inside. 

 Dentalium eboreum Conrad. 



Conrad, Proc. Acad. Nat. Sci. Phila., vol. 3, p. 27, 1846. 

 Fairly common, inside. 

 Dentalium leptum Bush. 



Slender, with fine posterior striations. 

 Occasional, inside. 

 Dentalium filum Sowerby. 



Straightish and slender, sculptured by regular anulations. 

 Occasional, inside. 



The following also are reported by Stimpson : 



Area adamsi, Lucina crenulatus Conrad (known as a fossil), Lepton lepidum, 

 Tellina fausta (a West Indian species), Macoma constricta (Brug.), Strig- 

 illa carnaria, Sportella constricta (Conrad) (known as a fossil), Solen liridis 

 Say (also reported by AUer), Saxicava arctica Linne, Clypidella piistvla, 

 Mangelia rubella, Mangelia filiformis Holmes, Murex spinicostaius, Can- 

 cellaria reticulata, Actaeon punctostriata Adams. 



Osborn records Bela plicata. 



