I I 



A MONOGRAPH 



OF THE 



LAND SHELLS OF 



T^ 



LAS MANIA. 



— BY- 



WILLIAM F. PETTERD. 



(Read before the Royal Society of Tasmania, Nov. 

 1 2th, 1878^ with Additions to April loth^ i87g.) 



PRINTED AT THE " LAUNCESTON EXAMINER" OFFICE. 



^ 1879. 



