VI 



THE NAUTILUS. 



Pisidium planatum Ancey 46 



Pisidium proximum Sterki, n. sp 5 



Pisidium subrotundum Sterki, n. sp 19 



Pisidium succineum Sterki, n. sp 99 



Pisidium superior Sterki, n. sp 98 



Pi tar ( Hysteroconcha) dione 2 



Plejona, Bolten 130, 143 



Pleurotoma (Genota) carpenteriana Gabb (PI. II, figs. 



1-3) 37 



Pleurotoma (Genota) cooperi Arnold (PI. II, fig. 10). . 38 

 Pleurotoma (Genota) riversiana Raymond (PI. II, fig. 9). 39 

 Pleurotoma (Genota) stearnsiana Raymond (PI. II, figs. 



4-6) 38 



Pleurotoma (Genota) tryoniana Gabb (PI. II, figs. 7, 8). 38 

 Pleurotoma^ the West American species of . . 37 



Polygyra (Stenotrema) brevipila Clapp, n. sp. (PI. V, 



fig. 1-4) 110 



Polygyra (Stenotrema) altispira Pilsbry (Pi. V, figs. 5-7) . Ill 

 Pomatiopsis Winkleyi Pilsbry 43 



71, 84, 96, 106, 119 



Popular conchology . 



Praticolella jejuna Say 



Pseudopartula, note on 



Psilocochlis Dall, note on the genus 



Psilocochlis mccalliei Dall. 



Publications received . 11, 36, 47, 



Quadrula trapezoides Lea. 



Ravenel collection 



Richfield Springs, New York, shells of 



Scala berryi Dall, n. sp. . 



Scala (Cerostrema) montereyensis Dall, n. sp. 



Scala from California, three new species of . 



Scala lowei Dall, n. sp. 



Scala rectilaminata Dall, n. sp. 



Scallops, migrations of 



Segmentina armigera Say (PI. VII, figs. 1-3). 

 Segmentina crassilabris Walker, n. sp. (PI. VII, figs. 4-6) 

 Segmentina wheatleyi Lea (PI. VII, figs. 7-9). 



. 71 



33, 46 



. 47 



. 128 



. 128 



143 



68 



36 



89 



127 



128 



127 



44 



127 



83 



123 



122 



123 



Sitala, a new Chinese 6 



