INDEX 



TO 



THE NAUTILUS, VOL. XVIII. 



INDEX TO SUBJECTS, GENERA AND SPECIES. 



Abida ......... 



Achatina ........ 



Admete woodwortbi Dall, n. sp. .... 



Agriolimax agrestis in Colorado 



Alabama shells collected in October and November, 



Alaea 



Alj'CEeus osliimanus Pilsbry & Hirase, n. sp. 

 Ancyli, notes on Eastern American . 

 Anculosa ampla, picta, plicata, etc. 

 Ancj'lus l)orealis Morse (PI. VI, figs. 14-16) 

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

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

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

 Ancylus ovalis Morse ...... 



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

 Ancylus pumilus Sterki (PL VI, figs. 20-22) 

 Ancylus rivularis Qay (PI. I, figs. 1-10, 13-15) . 

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

 Ancylus tardus Say (PI. I, figs. 11, 12, 16-23, PI. II, 

 Aporema Dall ....... 



Area ponderosa at Chatham, Mass. 



(iii) 



. 104, 106 



. 144 



. 123 



. 90 



1903 3T,54 



03,115, 119 



. 7 



16, 25, 75 



42 



80 



78 



75 



78 



78 



77 



82 



7,25 



81 



27 



143 



48 



1-22) 



