CONTENTS. 



This work contains the eight signatures I, J, K, L, and E, F, 

 G, H, each set of four restricted to one of the two great groups 

 of air-breathing and water-breathing genera. These may be 

 bound separately, although the book is intended to form one 

 volume. The indications of synonymy on the covers being 

 founded upon short descriptions, and the title on the numbers 

 from 1 to 5, as published, are cancelled as temporary, and the 

 matter of an unpublished specimen number, and of most of the 

 covers, is superseded, as the remainder must be in a few years. 

 In the meantime, those who wish to preserve the indications 

 of new species catalogued below, can preserve the last leaf of 

 the covers of numbers 1, 2, 3, 4, and 7. 



Title of 1842. Dedication. Preface. Signa- 

 ture 1 1 5, and 5 plates of PHYSA. 



No. 6, January, 1843. 



Sig. Jl 7, and 15 plates of LIMNEA. (J5, 

 6, 7, are marked K5, 6, 7, in error.) 



No. 3, pp. 1 16, pi. 1 5, July, 1841, with short charac- 

 ters on the cover, of Paludina rufa, Anculosa fusca, Ancy- 

 lus nuttalliij A. diaphanus, Lim. ferruginea, Physa integra, 



