THE NAUTILUS. 
Tasmanian land shells, Preliminary notes on 
Tetraplodon Spix 
Tulotoma in the Tennessee drains 
Unio Pilsbryi Marsh. a I, figs. 7, Ee 
Unio muddle : 
Unionide . 
Unionide and Mutllide, ies on A ies genera of 
Vallonia americana Ancey 
Vitrina limpida in Pennsylvania 
Volutoderma Woolmani Whitf. n. sp. @ LDF figs 4, Dy. 
Walton, Robert. (In memoriam) 
Yoldia montereyensis Dall, n. sp. 
Zonitidz, some notes on 
Zonites suppressus 
