1931] Marine Molluscan Shells of Beaufort 141 



Natica (Crypionatica) pusilla Say. C 



Dall, U. S. Nat. Mus. Bull. 37, pi. 50, fig. 21. 



"Not common. Two or three specimens dredged." 

 Sigaretus perspedivus Say. S C O J 



Arnold, Sea-beach at Ebb-tide, pi. 68, figs. 4 and 5. 



Fairly common, inside and out. (See Coues or Osborn.) 

 Calyptraea centralis (Conrad). 



Dall, Trans. Wagner Free Inst., vol. 3, p. 353. 



One specimen, inside. 

 Crepidula fornicaia Say. S C O J 



Dall, U. S. Nat. Mus. Bull. 37, pi. 50, fig. 23. 



Common, inside (see Osborn). Occasionally heavily ribbed by Pecien. 

 Crepidula glauca Say. 



Gould, Invertebrata of Massachusetts, fig. 535, 1870. 



Three specimens, inside. 

 Crepidula glauca convexa Say. S C O J 



Dall, U. S. Nat. Mus. Bull. 37, pi. 50, fig. 25. 



Fairly common, inside. 

 Crepidula aculeata Gmelin. 



Figures 39 and 40. 



One specimen, inside, bluish and broken, possibly fossil. 

 Crepidula plana Say. S C O J 



Gould, Invertebrata of Massachusetts, fig. 533, 1870. 



Fairly common. (See Osborn.) 

 Litiopa bombix Kiener. 



Adams, Genera of Recent Shells, pi. 34, fig. 5a. 



The protoGonch is decussated with minute riblets. 



One specimen among a lot of Sargasum weed. 

 Lilorina irrorata Say. S C O J 



Dall, U. S. Nat. Mus. Bull. 37, pi. 69, fig. 6. 



Abundant on culms of marsh grass that is partially submerged at high tide. 

 Serpulorbis (Vermicularia) spirata (Philippi). S C O J 



Dall, U. S. Nat. Mus. Bull. 37, pi. 51, fig. 4. 



Two specimens, inside. 

 Caecum pulchcllum Stimpson. 



Dall, U. S. Nat. Mus. Bull. 37, pi. 50, fig. 22. 



Fairly common in sand. 

 Triphoris perversum nigrocinctum C. B. Adams. S C J 



Gould, Invertebrata of Massachusetts, fig. 522, 1870. 



Occasional inside. 



The apex is not smooth in unworn specimens of tliis species but finely can- 

 cellated by radial riblets which cross two spiral threads. 

 Cerithiopsis (Eumeta) subulata Montagu. 



Dall, U. S. Nat. Mus. Bull. 37, pi. 52, fig. 1; and pi. 20, fig. 4. 



Uncommon, inside. 



For other species of this and the preceding, see forthcoming paper by Bartsch. 

 Seila adamsii H. C. Lea. S C O J 



Dall, U. S. Nat. Mus. Bull. 37, pi. 52, fig. 5. 



Common inside. (See Osborn.) 



