vi THE NAUTILUS. 
Plaxiphora Suteri Pilsbry, n. sp. ; ; : ; 8 
Pleurocera alveare Conrad, variations of . &2 
Polygyra hirsuta, variations due to station in . ' : 24 
Polygyra hirsuta on Long Island : 75 
Potamanax, note on . E : f : : 2 : 131 
Pupa syngensis from Montana : ; 3) 
Purpura saxicola Val. : : : 12 
Pyramidula? Randolphii Dall, n. sp. : : 150 
Rafinesque, the life and writings of . ; ; : 119 
Rangia the proper name of the Mactoid genus Gnathodon. 102 
Remarks on the status of species and subspecies 49 
Shell hunt forty feet under the sea. : , 85 
Shells of Aroostook Co., Maine . : : : 5 : 125 
Siphonaria sirius Pilsbry, n. sp. : 4 ; ; 8 
Siphonaria acmaeoides Pilsbry, n. sp. : : 16 
Siphonalia Stearnsii Pilsbry, n. sp... : 31 
Somatogyrus Sargenti Pilsbry, n. sp. 102, 105 
Some Arkansas snails : : : s : 36 
Southern shells in Missouri : : 18 
Spirula peroni in Jamaica : ; : : , : 36 
Spisula Gray. , 3 40 
Spisula subtruncata : : 28 
Tasmanian Acmza and iechuocliiae” ae on. : ; 127 
Trachydermon (Cyanoplax) Raymondi Pilsbry, n. sp. ; 46 
Trachydermon (Cyanoplax) Raymondi in British Columbia. 27 
Unio ellipsis in the Tennessee River . : : 82 
Unio oregonensis Lea, note on . , ; : 5 116, 1380 
Unio ochraceus and cariosus. (Illustrated). . : 121, 143 
Urosalpinx cinereus in San Francisco Bay : : 13 
Veronicella found in Central America, note on the species of 140 
Veronicella sp. nov. vel. mexicana var... : : 142 
Veronicella sp. noy. vel puntatissima var. . : : : 148 
Vertigo morsei Sterki, n. sp. . 89 
Vivipara georgiana limnothauma dobry i: Vals: ais 116 
Zonites cellarius in Western Pennsylvania : ; 82 
