THE NAUTILUS. 



Helix hortensis on Magdalen Island 105 



Helix hortensis, on the distribution in North America 



of . . 73, 95 



Helix jejuna Say, transferred to Praticolella . . .32 



Helix subglobosa 73, 77 



Insufficiency of an operculum as a basis of classification 



in the round-mouth shells . . . .91, 102, 113 



Lepyrium, note on 51 



Lepyrium showalteri . . . . . . . .51 



Lymnsea dalli Baker, n. sp. 



Lymnsea danielsi Baker, n. sp. 



Lymnsea leai Baker, n. sp. 



Lymngea megasoma Say . 



Manatee snail, Bulimulus dormani 



Microstoma hanleyanum Jous. . 



Mississippi, some shells of Alabama and 



Mitra picta Reeve, note on 



Mumford collection of shells . 



Nebraska, a list of shells from. 



Neoplanorbis Pilsbry, n. gen. . 



Neoplanorbis tantillus Pilsbry, n. sp. (PI. Ill, figs, 



Neritina showalteri . 



Nicaragua, shell collecting on the coast of 



. 55 

 . 126 

 36, 83 

 6 

 . 47 

 34, 40, 52 

 57 

 119 

 81 

 50 

 51 

 51 

 1 



3-5). 



Notes. 



9, 24, 36, 46, 71, 83, 94, 105, 118, 144 



Oklahoma, mollusks of 16 



Omphalotropis macromphala Bavay = O. quadrasi V. 



Moll 47 



Oysters carried by seaweed ...... 94 



Paravitrea aldrichiana, n. sp. (PI. V, figs. 8-11) . 109, 111 

 Paravitrea from Alabama, new species of 109 



Patularia swainson, notes on the genus Glabaris Gray or. 39 



Pearls, output of American 9 



Pisidium fragillimum Sterki, n. sp. .... 18 



Pisidium friersoni Sterki, n. sp 20 



Pisidium levissimum Sterki, n. sp. . . . . .18 



Pisidium minusculum Sterki, n. sp. . . . 17 



Pisidium neglectum Sterki, n. sp 87 



Pisidium neglectum var. ( ?) corpulentum Sterki, n. var. 88 



