BY R. TATE AND W. L. MAY. 349 



Since 1878, the largest contributor in descriptive work is Mr. 

 W. F. Petterd. In the Journal of Conchology (Vol. ii., 1879), 

 he offered criticisms on twelve species diagnosed by Tenison- 

 Woods, and described seven new ones; and in the same publica- 

 tion in 1884, communicated descriptions of thirty-seven alleged 

 new species. In the Proc. R. Soc. Tasmania for 1886 he 

 described five new species. 



The late Mr. Beddome described "New Marine Shells of Tas- 

 mania" in Proc. R. Soc. Tasm., 1882 and 1883. 



Mr. John Brazier contributed to Proc. R. Soc. Tasm., 1876, 

 synonyms of some Tasmanian Shells; and has elsewhere indicated 

 a few others. Professor Tate and Mr. Charles Hedley have in- 

 cidentally described species from Tasmanian material, also recog- 

 nising the extra-limital distribution of many species. 



The " Census," by Tenison- Woods, is based largely on the 

 collections made by the Rev. H. D. Atkinson, Messrs. W. F. 

 Petterd, W. Legrand and Augustus Simson. Some of the type- 

 specimens are in the Hobart Museum, but the majority of them 

 are retained by the collectors. After the date of the publication 

 of the Census, the late Mr. Beddome became an active collector; 

 he acquired the collection of Mr. Legrand, and on his death the 

 united collection passed into the hands of Colonel Beddome in 

 London. Mr. Harrisson also did good work ; his collection 

 became the property of Mr. W. L. May. Miss. Lodder's collec- 

 tion furnished several additional species to the " Census " list, 

 which were described by Mr. Petterd, the types remaining in her 

 possession. The Rev. T. Hull is another collector, whose cabinet 

 has been utilised by us. Considerable additions to the King 

 Island list, including a few species new for Tasmania, have been 

 made from several parcels of shell-material received by Mr. 

 J. F. Mulder of Geelong, which were determined by one of us. 



There cannot be a doubt that among the earlier collections 

 there were aliens to the fauna arising from error in the locality 

 name, possibly, some by confusion of " He de Diemen " with Terre 

 de Diemen, which is in N. W. Australia. Hence, Area aemitorta 

 crept an entry into the Tasmanian list. 



