NEW SPECIES OF SHELLS FROM BERMUDA. 



By William Healey Dall and Paul Bartsch, 



Of the, Division of Mollusks, U. S. National Museum. 



The senior author recently received from Mr. Arthur Haycock, of 

 Bailey's Bay, Bermuda, a request to identify some undetermined 

 species belonging to a series of Bermuda shells which Mr. Haycock is 

 preparing as a donation to the museum at Hamilton, Bermuda. 



On examination several of the species proved to be new and, with 

 Mr. Haycock's permission, are described in the following paper. Quite 

 a number are now first recorded from the islands, though previously 

 known from the American mainland. One species, Cantharus mas- 

 sena Risso, which is positively identified, is now for the first time 

 reported from the western Atlantic, being previously known only 

 from the Mediterranean. This distribution is parallel with that of 

 another small species of Cantharus, C. orhignyi Payraudeau, which is 

 represented in the U. S. National Museum by specimens from Texas, 

 Yucatan, and the West Indies, though originally described from 

 Corsica. 



The Columbella somersiana described in this paper is the largest 

 species of the group of C. mercatoria to which it belongs; and it is 

 much to be desired that full-grown specimens of this species may be 

 obtained. 



There are doubtless numerous other small species at Bermuda still 

 to be obtained which have not yet been recorded, and it is to be hoped 

 that Mr. Haycock's success in adding to the known fauna may stimu- 

 late others to continue exploration in the same line. 



MITRA HAYCOCKI, new species. 

 Plate 35, fig. 7. 



Shell small, stout, short-fusiform, white, flecked or clouded on the 

 prominences of the sculpture with pale yellow-brown; whorls about 

 five, nucleus white, blunt, polished; later whorls with, between the 

 sutures, four subequal spiral nodulous cords with deep narrower inter- 



Proceedinqs U. S. National Museum, Vol. 40— No. 1820. 



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