1912'] Distribution of Bivalves of Bkaufokt, N. C. 81 



Living animals are abundant near the iN^orfolk Southern rail- 

 road pier at Morehead City. Their occurrence is not known 

 elsewhere about Beaufort Harbor. The species is found bur- 

 rowing into pieces of coral and soft rock. The scarcity of suit- 

 able material into which the individuals may burrow accounts 

 for the limited distribution about Beaufort. The maximum 

 length noted is 46 mm. 



FAMILY TEREDINID^. 

 Genus Xylotrya Leach. 



Xylotrya gouldi Bartsch. 



Xylotrya gouldi Bartsch, Proc. Biol- Soc. Wash., vol. 21, p. 211, 1908; 

 Sigerfoos, Bull. Bur. Fish., vol. 27, p. 194, 1908. 



This species is found abundantly in wood such as piling, ex- 

 posed to the action of sea water. 



FAMILY PHOLADID^. 

 Genus Martesia Leach, 1825. 



Martesia (Section Diplothyra) smithii (Tryon). 



Diplothyra smithii Tryon, Proc. Acad. Nat. Sci. Phila., vol. 14, p. 201, 

 1862. 



Martesia (Section Diplothyra) smithii, Dall, Bull. U. S. Nat. Mus., 

 p. 72, 



A small mollusc, which has been found abundantly at the rail- 

 road pier at Morehead City. 



FAMILY MACTRID^. 

 Genus Spisula Gray, 1838. 



Spisula similis (Say). 



Mactra similis Say, Journ. Acad. Nat. Sci. Phila., vol. 2, p. 309, 1822. 

 Mactra solidissima van similis, Dall, Bull, Z7, U. S. Nat. Mus-, p. 62, 

 3889. 



The living animal is taken in the dredge, but specific local- 

 ities are not recorded. It has been found, 1912, on the sea- 

 tshore near Fort Macon. 



