THE NAUTILUS. 



Omphalina Andrewsse montivaga Pilsbry, n. var 



Opalliostyla Pilsbry, n. n. for Eudoxus Alb., preoccupied . 108 



Patulastra? [Punctum?] pugetensis and Pyramidula? Ran- 

 dolphii, generic position of, with suggestions for the 

 classification of American Zouitida? . . 17 



Pholas truucata from Revere, Mass. . 



Pisidia, description of new 74, 124 



Pisidium Walker! Sterki, u. sp 75 



Pisidium politum Sterki, n. sp. . 



Pisidium miliuin Held from Michigan . . 



Pisidium idahoense from Seattle, Washington . 



Pisidium ultramontanum ... 



Pisidium Randolphii Roper, n. sp. . 



Pisidium trapezoideum Sterki, n. sp. . . . 



Planorbes, notes on the smaller American . '- 



Planorbis bicarinatus var. aroostookensis in Michigan . 



Planorbis Sampson! Ancey from Illinois . . . 



Planorbis centervillensis 



Planorbis callioglyptus Vanatta, n. sp. . . 



Planorbis opercularis var. oregouensis Vanatta, u. var. 54 



Planorbis costatus De Tarr and Beecher .... 55 



Planorbis umbilicatellus, the geographical distribution of . 117 



Pleurodonte Bainbridgei and other Jamaica shells . 



Pleurocera subulare in water mains 37 



Plover caught by a Pinna 



Polygyra (Stenotrema) stenotrema depilata Pilsbry, n. var. 16 



Polygyracereolussanctijohannis Pilsbry, n. var. . 



Pyramidula allernata and Gastrodonta ligera reversed . 



Pyramidula strigosa reversed 



Raising baby snails 



Reversed American Helices, new records of . . 



Ryder, Dr. John A. (Obituary with portrait) . . 



Ruscheuberger, Dr. W. S. W. (Obituary) .... 31 



Scala, some new species of 



.Scala (Sthenorhytis) Mazyckii Dall, n. sp. . . 



Scala ranellina Dall, n. sp 



Scala Mitchell! Dall, n.sp U2 



Shells of Seattle, King Co., Washington 101 



Shells of Thunderhead Mt., N. C 120 



Small Land Mollusca from New Mexico . 116 



