THE NAUTILUS. Vv 
Mactridae of North America, synopsis of the. . 26,39 
Mactra Richmondi Dall, n. sp. . : ; ; . 26, 28 
Mactrella (Harvella) elegans Sowb. : : : ; 28 
Mactrella subalata Morch. ; : 42 
Margarita undulata . : : : : : 78 
Melongena corona. ; : ; 4 : : 11 
Megatebennus Geapenlatas: : : ; : : : 112 
Mollusca of the Paris Mains . ‘ : : 59 
Mollusks of Allegheny Co., Pa. t , 116 
Mollusk fauna of Philadelphia and environs’. ; 135 
Mulinia from the Pacifie Coast j : : pod 
Mulinia Gray : : ; : ; 27 
Mulinia gabbi Tryon ; : ; : . 4,42 
Mulinia modesta Dall, n. sp. (Pl. 1). ; : wrod 
Mulinia coloradéensis Dall, n. sp. (PLD. . PROP 2 
Mulinia coloradéensis var. acuta Dall, n. var. (Pl. 1). . 6, 41 
Mulinia Bradley Dall, n. sp. (PI. 1). : ee Gy Al 
My daily walk . , : ‘ 33 
Navanax n. gen. (Ravarcias being precerapied) : : 131 
New American freshwater shells : 3 114 
New method of preventing cracking of Pendens be oT 
New species of land shells from the Galapagos Islands 126 
New publications ; ! : 28, 83, 96, 107, 119, 181, 144 
New species of land shells from Puget Sound. : 129 
Notes and news = 12, 24, 35, 48, 57, 71, 82, 95,106, 118, 130, 143 
Notes on the reported extinction of the genus Achatinella 
and marvelous development of a Florida Fasciolaria. 123 
Olivella, a new variety of (O. ~— var. eee Ford). 
CREE): : : 105 
Orthalicus of Florida : f ’ UST SE 
Patulastra? (Punctum?) pugetensis Dall, n. sp. : : 13 
Perostylus, a new genus of Fusoid gastropod. ; : 17 
Perostylus Brazieri Tryon . : ; : 17 
Perostylus Fordianus Pilsbry  . : ; 18 
Perostylus the embryo of Megalatractus . : 67 
Pisidia, two new ea eruciatum Sterki; P. atta tara 
Sterki). (PI. ID). ; : .. 97, 99 
Pisidia, on collecting : - : 113 
Planorbis alabamensis Pilsbry, n. sp. : : : 114 
Planorbis bicarinatus aroostookensis Pilsbry, n. var. . : 115 
