73 



tion was accompanied by a letter giving an account of some 

 of its habits and changes of plumage. 



Mr. Henry W. Abbot was elected a member of the 

 Society. 



November 1, 1848. 



The President in the Chair. 



Present, nineteen members. 



Dr. Gould now gave descriptions of the following shells 

 from the Collection of the Exploring Expedition. 



Natica algida. Testa parva, tenuis, globosa, glabra, albido- 

 livescens : spira anfr. 4 ventricosis juxta suturam linearem tabu- 

 latis, ultimo magno ampullaceo: apertura semilunaris; colu- 

 mella arcuata : basis umbilico modico spirali funiculato, ad aditum 

 anguiato, perforata. Long, f ; lat. f poll. Hah. Rio Negro. 



Differs from N. soluta principally in its sutural region, and in 

 its umbilical region, in which latter respect it differs from several 

 allied species such as N. glohosa, N. borealis, &c. 



Natica dilecta. Testa parva, globulosa, solida, sub epider- 

 mide sordida eburnea, lineolis rubiginosis araneosis scutulata et 

 prope suturam lituris castaneis maculata ; spira rotundata, anfr. 5 

 ventricosis : apertura semilunaris ; labro crasso ; columella valde 

 callifera, callo antice et ad funiculum castaneo, et canali trans- 

 verso fere diviso ; umbilico amplo, funiculo fere impleto. 

 Long. I ; lat. |- poll. Hah. ? 



Has a general resemblance in size and form to N. maroccana^ 

 and must also be allied to N. lupinus, Desh. The whorls are 

 closely appressed at the suture, and the network coloring is much 

 like that on the bands of Conns ammiralis. 



Stomatella decolorata. Testa auriformis, depressa, sub- 

 perforata, albida maculis lacteis et labeculis sanguineis marmor^ 



