THE NAUTILUS. Vli 



Pisidium irabecille Sterki, n. sp. . . . . 5 



Pisidium monas Sterki, n. sp. . . . . .100 



Pisidium peraltum Sterki, n. sp. . . . . . 5 



Pisidinm streatori Sterki, n. sp. . . . . .100 



Pisidium tenuissimum Sterki, n. sp. . . . .99 



Planorbis corpulentus Say, supplementary note on .33 



Planorbis persicus Ancey, n. sp. . . . . . .84 



Planorbis umbilicatellus Cockerell, in New Mexico . . 10 



Pleurobranchus californicus Ball., n. sp 92 



Polygyra albolabris alleni ...... 27,28 



Polygyra andrewsae altivaga Pils. . '. . . o4 



Polygyra andrewsae normalis Pils. . . . . .54 



binneyana 26,27,28 



edwardsi magnifumosa Pils. . . . .55 



Polygyra ferrissi 50,51,53 



Potygyra hirsuta pilula Pils 55 



Polygyra pilsbryi Ferriss, n. sp., in search of . . .25 

 Polygyra stenotrema without a lip-notch . . . .135 



Pomatiopsis hirasei Pils., n. sp. . . . . . .12 



Pristogloma Dall. proposed for Glomus Jeffreysi 1876, not 



of Gistel 1848 . 44 



Publications received . . . .34, 45, 94, 104, 119, 130 



Punctum blandianum Pils 58 



Punctum japonicum Pils., n. sp. 8'2 



Pyramidula elrodi Pils., n. sp . 40 



Quintard, J. B . 



Rochester, N. Y., shell collecting near . . . .69 

 Saxidomus of the West Coast, notes on the distribution of 



the ! 



Shell collecting on the Mosquito Coast . . . .94 

 Shells of the marl-deposits of Aroostook county, Maine. . 101 

 Sistrum nicocheanum Pils., n. sp. .3 



Sphaerium crassum Sterki, n. sp. 140 



Sphaerium walkeri Sterki, n. sp l-ll 



Spiraculum assamense Fulton, n. sp. (Assam) . . .87 

 Subemarginula yatesi Dall, a new species from California . 125 

 Succinea campestris vagans Pils., n. var. . . . .74 



To a slug (in alcohol) .36 



Trishoplita cretacea var. bipartita Pils., n. var. . .107 



