89 



also presented from Mr. Alger, specimens of Hematite, 

 from Amenia, N. Y., Fluor-spar, from Cumberland, Eng., 

 and variegated Copper Ore from the Bruce mine, on the 

 north shore of Lake Huron. 



Dr. Cabot exhibited a number of birds, which had been 

 recently mounted for the Society's collection. Among 

 them were the Roseate Tern, Sterna paradisea, obtained by 

 him at Beverly, Mass., the most northern locality in which 

 it had as yet been found ; and Saltator raptor, a Yucatan 

 species, described and figured by him in the Journal of the 

 Society, Vol. V., p. 90, as Pyrrhula raptor. 



Mr. Ayres presented to the Society a number of speci- 

 mens of the Cyamus ceti, Whale louse, attached to a piece 

 of skin of the Right Whale. 



December 20, 1848. 

 The President, in the Chair. 



Present, twenty-two members. 



Dr. Gould presented descriptions of the following shells 

 brought home by the U. S. Exploring Expedition : 



Turbo confragosus. Testa solida, albida, pyramidata, rudis, 

 rugosa ; rugis parvis, obtusis, ad peripheriam et ad angulum 

 anfractuum interdum in splnis compressis prominulis productis : 

 spira anfr. ad 6, angulatis superne declivibus, ultimo ad peripher- 

 iam acuto ; sulura callosa : basis planulata, liris squamosis con- 

 centricis inequalibus ad 8 cincta : apertura circularis ; labro 

 acuto, perobliquo ; columella curta antice dentata ; fauce mar- 

 garitacea. Lat. 1^, alt. |- poll. Hab. Dean's Island, Paumotu 

 group. 



This species has the low conical form, and bony aspect of the 

 stellate species found in the West Indies. I know of no other 



