THE NAUTILUS. Vv 
Omphalina Andrews montivaga Pilsbry,n.var.. . . 15 
Opalliostyla Pilsbry, n. n. for Eudoxus Alb. SB eereupicdl: 108 
Patulastra ? [Punctum?] pugetensis and Pyramnidulay? Ran- 
dolphii, generic position of, with suggestions for the 
classification of American Zonitide . 17 
Pholas truncata from Revere, Mass. 55 
Pisidia, description of new . 74, 124 
Pisidium Walkeri Sterki, n. sp. . 75 
Pisidium politum Sterki, n. sp. . 75 
Pisidium milium Held from Michigan . 76 
Pisidium idahoense from Seattle, Washington . 98 
Pisidium ultramontanum . 98 
Pisidium Randolphii Roper, n. sp. 99 
Pisidium trapezoideum Sterki, n. sp. . 124 
Planorbes, notes on the smaller American. . . ie Ba, 52 
Planorbis bicarinatus var. aroostookensis in Micivsan as 5 
Planorbis Sampsoni Ancey from Illinois. . . ..... 36 
Ebinarbisicentervillensis:; -. . . -. (Meee aes 2 lay 36 
Planorbis callioglyptus Vanatta,n.sp.. .. . . ne 54 
Planorbis opercularis var. oregonensis Vanatta, n. var... D4 
Planorbis costatus De Tarr and Beecher. . . . . 55 
Planorbis umbilicatellus, the geographical Bei ation wih NG 
Pleurodonte Bainbridgei and other Jamaica shells. . . .. 15 
Pleurocera subulare in water mains. ........: 37 
Plover caught by a Pinna. . . . viet 107 
Polygyra (Stenotrema) stenotrema depilais Bilciry: n. var. 16 
Polygyra cereolus sanctijohannis Pilsbry,n. var... . . . 56 
Pyramidula alternata and Gastrodonta ligera reversed . . 84 
Eyramiduls strigosa reversed. . . eames... 2 4. . 84,108 
Raising baby snails. . . . . ey: ar 79 
Reversed American Helices, new _reginele e Wee tate 3) 94 
Ryder, Dr. John A. (Obituary with portrait) Sits ae ee 29 
Ruschenberger, Dr. W.S. W. Oa | 2S ee 31 
Scala, some new species of. . . S| Fee meee 111 
Seala (Sthenorhytis) Mazyckii Dall itl..j0, as tila 
eraliaitanellina Dall,n.sp... . -teeeeee es vs 111 
Scala Mitchelli Dall,n.sp.. . . 20: ee 112 
Shells of Seattle, King Co., W achive 3S aaa ae 101 
enelson Lhunderhead Mt., N.C... Miers... . . 120 
Small Land Mollusca from New Mexico. ....... 116 
