TffE NAUTILUS, vil 



Pisidium ash muni Stei'ki, n. sp. . 42 



Pisidium complanatum Sterki, n. sp. . . . . .19 



Pisidium costatum Sterki, n. sp. . . . . . . 22 



Pisidium cuneiformis Sterki, n. sp. . . . .Si 



Pisidium danielsi Sterki, n. sp. . . . . . .42 



Pisidium mainense Sterki, n. sp. . . . . . 21 



Pisidium okioense Sterki, n. sp. . . . . 20 



Pisidium rowelli Sterki, n. sp. . . . . . . 80 



Pisidium obtusale Pfr. , . . . . 43 



Planorbis magnificus Pils., n. sp. . . . . . 75 



Pleistocene mollusks of White Pond New Jersey . . 38 

 Pleurotomaria hirasei Pils., n. sp. . . . . .36 



Polygyra townsendiana var. ptychophora .... 4 



Pol3 r g3'ra tridentata discoidea Pils., n. subsp. . . . 142 



Polyplacophora of the Conchylien Cabinet, notes on . .58 

 Porphyrobaphe galactostoma Ancey , . . . .89 



Porphyrobaphe sarcostoma Ancey, n. sp. . . . 83, 104 



Porphyrobaphe victor Pfr. ....... 90 



Porphyrobaphe yatesi Pfr. ...... 89, 104 



Price, Miss S. F 71 



Pristiloma japonica Pils. & Hir., n. sp. . . . .70 



Ptychochilus . .116 



Publications received ... 24, 47, 58, 72, 92, 107, 132 

 Punctum infans Pils. & Hir., n. sp. . . . . .107 



Pnpacea and associate forms, notes on the nomenclature of . 114 



Pupilla . . .115 



Pyramid ula solitaria ........ 4 



Pyramidula strigosa Gld. ....... 1-5 



Pyramidula strigosa Gld. var. alpina Elrod n. var. . . 2 

 Pyramidula strigosa Gld. var. Cooperi W. G. B. . . . 4 



Quadrula, observations on the genus . . . . .111 



R'ossiter, Richard ........ 36 



San Nicholas Island, notes on the Mollusk fauna . . 66 

 San Salvador, Bahamas, a partial list of the marine mol- 

 lusks of . . . . . . . . . .57 



Saraphia . . . . . . . . . .115 



Schismope rimuloides (Cpr.) at San Diego, Cal. . . .84 



Scissurella dalli Bartsch, n. sp. . . . . . . 90 



Septidae, note on the family ...... 55 



