On the new genus Petterdiana

In the year 1887 Mr. C. F. Ancey, in his descriptions of new genera and sub genera of the Helicidae, published in the Conchologists' Exchange, Vol. ii., p. 22, defined and named a sub genus of Endadonta from the Caroline Islands under the name of Brazieria. Mr. W. P. Petterd, in his contributions for a systematic Catalogue of the Aquatic Shells of Tasmania in the Proc. Roy. Soc, Tasmania, p. 76, 1888, defined and named a new genus of the family Amnicolidae under the name of Brazieria. Mr. Ancey's name having priority, I take the pleasure of re-naming the aquatic Tasmamian genus after my very esteemed friend, correspondent, fellow voyager and companion, Mr. William Frederick Petterd, of Launceston, Tasmania.