286 PROCEEDINGS OF THE NATIONAL MUSEUM. Welee See 
Lucina janeirensis Reeve= Diplodonta punctata Say. 
Lucina nitens Reeve=Diplodonta sericata Reeve. 
Lucina venezuelensis Dunker= Diplodonta punctata Say. 
Lucinopsis kroyerit Poulsen is not Cyclinella kroyert Philippi. 
Lunatia Gray cf. Euspira Agassiz. 
Lyonsia brevifrons Sowerby = Entodesma cuneata Gray. 
Lyonsia cuneata Orbigny = Entodesma cuneala Gray. 
Lyonsia patagonica Orbigny = Entodesma cuneata Gray. 
Lyonsia picta Sowerby =Entodesma cuneata Gray. 
Macoma occidentalis Dal=M. undulata Hanley. 
Mactra calbucana Philippi, 1893=Mulinia byronensis Gray. 
Mactra cibaria Philippi, 1893= Mulinia edulis King. 
Mactra cuneola Gould=Mulinia edulis King. 
Mactra epidermia Philippi, 1893= Mulinia edulis King. 
Macira jonasi Philippi, 1893=Mulinia bicolor Gray. 
Mactra lotensis Philippi, 18983=Mulinia edulis King. 
Mactra marcida Gould=Mulinia edulis King. 
Mactra paitensis Philippi, 1893=M. velata Philippi, 1848. 
Macira pencana Philippi, 1893=Mulinia byronensis Gray. 
Marginella cyprxola Sowerby = Erato scabriuscula Gray. 
Marginella granum Kiener, 1835 not of Philippi 1850= rato scabriuscula Gray. 
Marinula calladensis Petit, 1854=M. marinella Kuster. 
Meleagrina Lamarck, see Margaritiphora Megerle. 
Melongena Schumacher, 1817=Galeodes Bolten, 1798. 
Mesodesma chilensis Orbigny = M. donacium Lamarck. 
Mitra chilensis Kiener, 1836=M. orientalis Gray. 
Mitra foraminata Swainson, 1835=M. lens Mawe. 
Mitra funiculata Reeve, 1844=M. sulcata Swainson. 
Mitra inca Orbigny, 1841=M. lens Mawe. 
Mitra lignaria Reeve, 1844=M. lens Mawe. 
Mitra lineata Swainson, not Gmelin= MM. sulcata Swainson. 
Mitra maura Swainson, 1835=M. orientalis Gray. 
Mitra rupicola Reeve, 1844=M. lens Mawe. 
Mitrularia, cf. Cheilea. 
Mitrularia cepacea Broderip=Cheilea equestris Linneeus. 
Modiola caudigera Lamarck= Lithophaga aristata Dillwyn. 
Modiola ovalis Clessin= Modiolus purpuratus Lamarck. 
Modulus trochiformis Eydoux and Souleyet=M. perlatus Dillwyn. 
Monoceros Lamarck, not Bloch=Acanthina Fischer. 
Monoceros citrinum Sowerby =Acanthina calcarlongum Martyn. 
Monoceros costatum Sowerby =Acanthina calcarlongum Martyn. 
Monoceros crassilabrum Sowerby = Acanthina calcarlongum Martyn. 
Monoceros cynatum Sowerby =Acanthina lugubris Sowerby. 
Monoceros fusoides King= Chorus giganteus Gray. 
Monoceros glabratum Deshayes= Acanthina calcarlongum Martyn. 
Monoceros globulus Sowerby = Acanthina calcarlongum Martyn. 
Monoceros imbricatum Sowerby = Acanthina calcarlongum Martyn. 
Monoceros maculatum Gray = Acanthina brevidentata Mawe. 
Monoceros muricatum Reeve=Acanthina muricata Broderip. 
Monoceros unicorne Gray =Acanthina calcarlongum Martyn. 
Monodonta carchidonius Lamarck, ef. Modulus perlatus Dillwyn. 
Monodonta catenifera Potiez and Michaud, 1838, not of Kiener, 1836=Tegula quadri- 
costata Gray. 
Mouretia reticulata Sowerby, 1835=Gadinia peruviana Sowerby. 
