Index to the Nautilus 



New American land shells. Vol. 16, No. 3, p. 30, 1902. 

 Enteroxenos ostergreni, a new endo-parasitic gastropod. \'ol. 16, 



No. 3, p. 36, 1902. 

 New land mollusks of the Japanese Empire. \'ol. 16, No. 4, p. 



45, 1902. 

 New land mollusks of the Japanese Empire. \'ol. 16, No. 5, p. 



33, 1902. 

 A new Florida Ilelkina. Vol. 16, No. 5, p. 52>, 1902. 

 Vertigo coloradoensis and V. ingersolli. YoX. 16, No. 5, p. 58, 



1902. 

 Ashmiinella levettei Bid. Vol. 16, No. 5, p. 59, 1902. 

 Pyramidula elrodi and Epiphragmophora circumcarinata. Xo\. 



16, No. 6, p. 62, 1902. 



Cantharidns peronii Philippi. \'ol. 16, No. 6, p. 72, 1902. 

 Helicina japonica and related forms. Vol. 16, No. 11, p. 130, 



1903. 

 A new Pleiirotomaria. \'ol. 17, No. 3, p. 36, 1903. 

 Land shells of Curacao. Vol. 17, No. 4, p. 48, 1903. 

 The use of the generic name Ilelicostyla. YoX. 17, No. .5, p. 59, 



1903. 

 A new Jamaican Colohostylus. \o\. 17, No. 6, p. 65, 1903. 

 New Japanese marine mollusks. Vol. 17, No. 6, p. 69, 1903. 

 The greatest American Planorhis. Vol. 17, No. 7, p. 75, 1903. 

 A new Guppya from Florida. Vol. 17, No. 7, p. 77, 1903. 

 Schismope rimuloides Carpenter, at vSan Diego, California. Vol. 



17, No. 7, p. 84, 1903. 



Shells from Douglas County, Central Washington. \'ol. 17, No. 



7, p. 84, 1903. 

 A new Floridian Amnicola. \o\. 17, No. 10, p. 113, 1904. 

 Note on shells from Arizona. \'ol. 17, No. 11, p. 131, 1904. 

 Vertigo andrusiana Pilsbry. \'ol. 17, No. 11, p. 131, 1904. 

 A new subspecies of Polygyra tridentata. \o\. 17, No. 12, p. 142, 



1904. 

 Notices of six new species of Unio from the Laramie Group. Vol. 



18, No. 1, p. 12, 1904. 



Note on the Venus arakana Nevill. Vol. 18, No. 2, p. 23, 1904. 

 Plectopylis in the Riukiu Islands. Vol. 18, No. 5, p. 58, 1904. 

 A new Lower Calif ornian Sonar ella. \'ol. 18, No. 5, p. 59, 1904. 



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