THE NAUTILUS. 35 
Laskeya, nom. nov. for Eumeta, Moérch, 1868, not Walker, 
1855. 
Collonista, gen. nov. for Collonia picta, Pease. 
Talopena, gen. nov. for Monilea incerta, Iredale. 
Korovina, gen. nov. for Vanikoro wallacei, Iredale. 
Forskalena, gen. nov. for Trochus fanulum, Gmelin. 
Enigmonia, gen. nov. for Anomia rosea, Gray—=Aenigma aenig- 
matica, Ancti. 
Amyclina, gen. nov. for Buccinum corniculum, Olivi. 
Pyreneola, gen nov. for Columbella abyssicola, Brazier. 
Caporbis, Bartsch, is a Vermetid nucleus. 
Propebela, gen. nov. for Murex turricula, Mont. 
Calceolata, nom. nov. for Calceolina A. Adams. 
Mirothyca, not Microtheca. 
Turrid names discussed: 
Colicryptus, gen. nov. for Buccinum fusiforme, Broderip. 
Siphonorbis marshalli, nom. nov. for Fusus attenuatus, Jeffreys. 
Cominella and Euthria subdivided: 
Afrocominella, gen. nov. for elongata, Dunker. 
Burnupena, gen. nov. for porcatum Gmel. = cincta, Bolten. 
Ewarna, H. & A. Adams, must be used for linea, Martyn. 
Euthrena, gen. nov. for vittata, Quoy & Gaimard. 
Japeuthria, gen. nov. for ferrea, Reeve. 
Syntagma, nom. nov. for Donovania, Bucquoy, D., & Dollfuss. 
Acostza, Orbigny, will replace Mulleria, Ferussac, 1828. 
Gistel’s Molluscan Generic Names, 1848, enumerated. 
Damoniella, gen. nov. for Bulla cranchii, Fleming. 
Muricodrupa, gen. nov. for Purpura fenestrata, Blainville. 
Teretianax, gen. nov. for Scalenostoma suteri, Oliver. 
Presidential Address. By J. R. LeB. Tomlin. A Systematic 
List of the Fossil Marginellidae, pp. 41-56. 
A SyYNoPsis OF THE CLASSIFICATION OF THE FRESH WATER 
Mottiusca oF NortH AMERICA north of Mexico, and a Cata- 
LOGUE OF THE MORE RECENTLY DESCRIBED SPECIEs, with notes. 
By Bryant Walker. Univ. of Michigan Mus. of Zoology, Misc. 
Pub. No. 6. Students of North American fresh-water mollusks 
of this generation have had as a basis the invaluable manuals 
