INDEX 



TO 



THE NAUTILUS, VOL. XVIII. 



INDEX TO SUBJECTS, GENERA AND SPECIES. 



Abida. .'...., . 104,106 



Achatina .' 144 



Admete woodworthi Dall, n. sp. . . . . . . 123 



Agriolimax agrestis in Colorado . . . . .90 



Alabama shells collected in October and November, 1903 37,54 



Aleea 103,115,119 



Alycaeus oshimanus Pilsbry & Hirase, n. sp. ... 7 



Ancyli, notes on Eastern American ... 16, 25, 75 



Anculosa ampla, picta, plicata, etc, . . . . .42 



Ancylus borealis Morse (PI. VI, figs. 14-1G) . . .80 

 Ancylus elatior Ahth. (PI. V, figs. 10-12) . . . .78 



Ancylus filosus Conrad (PI. IV, figs. 1-8) . . .75 



Ancylus haldemani Bgt. (PI. VI, figs. 9-13) . . 78 



Ancylus ovalis Morse ........ 78 



Ancylus parallelus Hald. (PI. V, figs. 1-9) . . . .77 



Ancylus pumilus Sterki (PI. YI, figs. 20-22) . . 82 



Ancylus rivularis Say (PI. I, figs. 1-10, 13-15) . . 17, 25 

 Ancylus shimeki Pilsbry (PI. VI, figs. 17-19) . . .81 

 Ancylus tardus Say (PI. I, figs. 11, 12, 16-23, PI. II, 1-22) . 27 

 Aporema Dall . . . . . . . . .143 



Area ponderosa at Chatham, Mass. . . . . . 48 



(iii) 



