THE NAUTILUS. V 



Helix hortensis on Magdalen Island. . . . . 105 

 Helix hortensis, on the distribution in North America 



of . I 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 



Lymnasa dalli Baker, n. sp 125 



Lynmeea danielsi Baker, n. sp. 55 



Lynmsea leai Baker, n. sp. . . 126 



Lymnaga megasoma Say 36, 83 



Manatee snail, Bulimulus dormani . . . .6 



Microstoina hanleyanum Jous. . ... . . .47 



Mississippi, some shells of Alabama and . . 34, 40, 52 



Mitra picta Reeve, note on 57 



Mumford collection of shells 119 



Nebraska, a list of shells from 81 



Neoplanorbis Pilsbry, n. gen 50 



Neoplanorbis tantillus Pilsbry, n. sp. (PI. Ill, figs. 3-5). 51 



Neritina showalteri 51 



Nicaragua, shell collecting on the coast of ... 1 

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



Oklahoma, mollusks of 16 



Omphalotropis macromphala Bavay = 0. quadrasi V. 



Moll. . . ..... 47 



Oysters carried by seaweed ...... 94 



Paravitrea aldriehiana, 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 



