105 



ON THE NEW GENUS PETTEEDIANA. 



By John Beazieb, F.L.S., C.M.Z. Soc., London, Cobe. 



Mem. Eoy. Soc, Tas. 



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. Eoy. Soc, Tasmania, p. 76, 

 1888, defined and named a new genus of the family 

 Amnicolida under the name of Brazieria. Mr. Ancey'snam'e 

 having priority, I take the pleasure of re-naming the aquatic 

 Tasmaman geuus after my very esteemed friend, correspon- 

 dent, fellow voyager and companion, Mr. William Frederick 

 Petterd, of Launceston, Tasmania. 



Pettekdiana, Brazier. 



Shell globosely rounded, solid, imperforate ; spire small, 

 body whorl large ; aperture very oblique, effuse ; outer lip 

 acute, inner lip thickened ; operculum horny, subspiral, 

 animal (?) " r 



Type : Ampuxlabia tasmanica, Tenison-Woods. 



Pettekdiana tasmanica, Tenison-Woods. 



Ampullaria tasmanica, Tenison-Woods, Proc. Eoyal 

 Soc, Tasmania, p. 117. 



Amnicola tasmania; Tate and Brazier, Check List of 

 the Fresh Water Shells of Australia, Proc. Linn. 

 Soc, N.S.W., vol. vi., p. 563. 



Brazieria (non Ancey, 1887) tasmanica, Petterd, Proc. 

 Eoyal Sue, Tasmania, p. 76, pi. 1, fig. 1. 



Brazieria (non Ancey, 1887), Petterd ; Johnston, Proc. 

 Eoyal Soc, Tasmania, p. 1;0. 



Amnicola ? (Brazieria) tasmanica, Tenison-Woods 

 (Amnicola), Johnston, I.e., p. 138, No. 304. 



Abundant upon stones in a small tributary of the 

 Arthur Eiver, west of Mount Bischoff. "(Messis. 

 James Smith, W. F. Petterd, E. M. Johnston.) 



Ha 



1876. 



1881. 



1888. 

 1890. 

 1890. 

 Hab. 



