THE NAUTILUS. 



Mactrella (Harvella) elegans Sowb. . . . . .62 



Mactrella, notes on American species of . . . .61 



Margaritana margaritana ....... 5 



Margaritana monodonta ....... 5 



Marginella calif ornica Tomlin . . . . . .138 



Marginella varia Sowerby . . . . . .138 



Michigan, mollusca from Berrien county . . .47 



Micrarionta veatchii ....... 97 



Microceramus perconicus anafensis Henderson . . .137 

 Mollusca of Anaheim Bay, California . , . .129 

 Montana Mollusca ....... 124, 144 



Museum Boltenianum, an index to the . . . .27 



Nantucket and Martha's Vineyard, notes on collecting . 109 

 Najades, studies in . . . . . . . .63 



New England, fauna of . . . . . . .120 



New Mexican Expedition of 1914 ... 13, 29, 41 



Ohio, mollusca of Geneva . ..... 121 



Oklahoma, the Gastropoda of Payne county . . .88 

 Oliva bulbosa var. imraaculata Vanatta n. n. . . .68 



Oliva ispidula var. algida Vanatta n. var. . . .71 



Oliva ispidula var. gratiosa Vanatta n. var. . . .71 



Oliva peruviana var. subcastanea Vanatta n. var. . . 68 

 Oliva peruviana var. vadi Vanatta n. var .... 132 



Oliva, notes on ....... 67, 132 



Olivella biplicata var. lapillus Vanatta n. var. . . .71 



Olivella blanesi var. albata Vanatta n. var. . . .71 



Ontario, mollusca of Georgian Bay ..... 132 



Oreohelix barbata Pils ....... 30 



Oreohelix cooperi berryi Pils., n. subsp. . . . .48 



Oreohelix cooperi W. G. B. . . . . . . 142 



Oreohelix haydeni utahensis Hemphill .... 139 



Oreohelix strigosa magnicornu Pilsbry .... 141 



Oysters of Oyster Run, Durham, N. H. . . . .28 



Paludestrina salsa in New Jersey . . . . .85 



Philomycus ohioensis Sterki MS . . . . .122 



Pleistocene mollusks from Illinois . . . . .87 



Pleurobema cor Simp. . . . . . . .116 



Pleurobema lewisii Lea . . . . . . .114 



Polygyra albolabri.'', edible ...... 143 



Publications received ... 24, 59, 106, 120, 132 

 Quadrula heros Say ....... 4 



Reversed or sinistral shells ...... 128 



Shells of Put-in-Bay Island, Lake Erie . . . .18 



Sierra de Cubitas, Camaguey, Cuba 17 



Sinistral shells 128 



Solenopsidae = Solenomorphidai . . . . .84 



