No. III. Price, SljSO, coloured. 

 AMERICAN 



COJ^CHOliOGY, 



OR 



DESCRIPTIONS 



OF THE 



SHELLS OF NORTH AMERlCA^ 



ILLUSTUATEl) BY 



COLOURED rxauRES 



FROM 



ORIGINAL DRAWINGS EXECUTED rilO.lI NATURE. 



CONTENTS. 



Alasmodonta confragosa, ....- --pi. xxi 



Araphidesma transversum, ..-,... xxviii 



" " tcquale, xxviii 



Fusus cinereus, xxix 



" corncus, - ........ xxix 



Paludina intcrtexta, xxx 



" " pondorosa, xxx 



" " subpurpurea, xxx 



Sigaretus maculatua, xxv 



" " pcrspectivus, xxv 



Scalaria clathrus, var. 6. xxvii 



" " linoata, xxvii 



" " nmltiatriata, xxvii 



Uuio dchiscens, xxiv 



'' phaseolus, .......--. xxii 



" tctralasmus, xxlii 



Vemis grata, xxvi 



NEW-HAU.>IONY, INDIANA. 



Printed aC (he Srliool Pitn. 

 (fjeHlcmbCL l'?30.) 



