THE NAUTILUS. 



123 



Polyuices brunnea Link., San 



Paulo. 



Polynices rufilabris Rve.* 

 Natica canrena Lain. 

 Natica pusilla Say (!). 

 Natica sulcata Lain. 

 Acmrea onyehina Old. 

 Phasianella minuta Anton. 

 Uvanilla americana Gmel. 

 Astralium tuber L. 

 Omphalius hotessieriauus Orb. 

 Calliostoma jucundum Gld. 

 Calliostonia jujubiiiuni Gmel. 

 Subemarginula octoradiata 



Gmel. 



Fissurella rosea Gmel. 

 Fissuridea alter nata Say. 

 Plicatula ramosa Lam. 

 Spondylus spathuliferus var. in- 



ermis. 



Pecten ornatus Lam. 

 Mytilus exustus Lam. 

 Botulina opifex Say. 

 Area jamaicensis Gmel. 

 Area imbricata.* 



Area auriculata.* 



Area Candida Ch., San Paulo. 



Lueina costata Conr. . 



Chama congregata Conr. 



Cardium Isevigatum L. 



Venus pectorina Lam. (also S. 



Paulo). 



Venus cribraria Conr. 

 Venus circinata Born. 

 Venus subrostrata Lam. (beaui 



Reel.). 



Cytherea varians Wood. 

 Dosinia concentrica Born, S. 



Paulo. 



Lucinopsis tennis Reel., S. Paulo. 

 Tagelus mollis Gould, Rio 



Grande do Sul. 

 Tagelus gibbus Spengl. (+ pla- 



tensis Orb.). 



Macoma constricta Brug. 

 Mactrella Ilieringi Dall, n. sp., 



San Paulo. 



Semele reticulata Gmel. 

 Bouchurdia rosea Mawe (Rio?). 



Mactrella Iheringi n. sp. 



Shell thin, white, inflated, with small and prominent beaks, ex- 

 ternally with fine concentric, and a few irregular, radial lines, and 

 a silky-yellowish epidermis, the beaks median, smooth, with an obso- 

 lete posterior keel, the lunular region widely and deeply impressed ; 

 hinge of the subgenus, the pallial sinus angular, reaching to the 

 vertical of the beaks. Lon. 65'0 ; alt. 52'0 ; diam. 32 - mm. 



ISAAC LEA DEPARTMENT 



[Conducted in the interest of the Isaac Lea Conchological Chapter of the Agassiz Associa- 

 tion by its General Secretary, Mrs. M. Burton Williamson.] 



VolumeS of the Transactions has begun its annual round of the 

 Chapter members. It will be some time before every member has 



