PREFACE. 



Thiukinc: tliat certain changes shoul.l be made in llieclasi«i- 

 fication of onr native M0LLU8KS; tliat tlie system of Bin- 

 NEY and Bland shonhi be more thoroughly adopted, and that 

 a convenient pocket catalogue of our sliells is not entirely 

 superfluous, we issue this List. Tiic UnivaJves are grouped 

 according to Binney and Bland, tlie Bivalves, according to 

 Gill. The signs used are, f siguifyiiig frequent, r, r;ire or lo- 

 cal, and d, not positvely found liere. 



With each species of the lainl shells is given the station 

 wliere it is most apt to b? fou.i.l, nil, if not marked citlier, 

 r, f, or d, the species is common. 



We are indebted in no sm ,11 degree to the old catalogues 

 of KiiJTLAND, Wheatley, Antho.ny, Hud Shaffee, and the 

 recent ones of I?.1\I.Bykns, and of G.W.Hakpee and A.G. 

 Wetherby. 



Exchanges will be given for libei-al il'sidprat'i. 

 CixciNXATi, August 6, 1876. 



