Index to the Nautilus 



Some studies on the Morphology of the Cydadidae. Vol. 12, No. 



10, p. 117, 1899. 

 New Pupidae. Vol. 12, No. 11, p. 127, 1899. 

 Pisidia new to our country, and new species. Vol. 13, No. I, 



p. 9, 1899. 

 Pisidimn hahdiverki n. sp. \'ol. 13, No. 8, p. 90, 1899. 

 New Pisidia. Vol. 14, No. 1, p. 5, 1900. 

 f4New Pisidia. Vol. 14, No. 9, p. 99, 1901. 



New North American Sphneria. Vol. 14, No. 12, p. 140, 1901. 

 ) New Pisidia. Vol. 1.5, No. 6, p. 66, 1901. 

 ft Pisidium strengii n. sp. Vol. 15, No. 11, p. 126, 1902. 



Some notes on the North American Calyculinae, with new species. 

 Vol. 16, No. 8, p. 89, 1902. 

 '.'New Pisidia. Vol. 17, No. 2, p. 20, 1903. 

 ' New Pisidia. Vol. 17, No. 7, p. 79, 1903. 

 I New North American Pisidia. Vol. 17, No. 4, p. 42, 1904. 

 (-/New species of Pisidium. Vol. 18, No. 9, p. 108, 1905. 

 (+A new species of Pisidium. Vol. 18, No. 11, p. 128, 1905. 

 YfCycladidae of the Southern States. Vol. 19, No. 3, p. 30, 1905. 



Vertigo perryi n. sp. Vol. 19, No. 5, p. 53, 1905. 

 y\ New varieties of North American Pisidia. Vol. 19, No. 7, p. 80, 



1905. 

 ^ New varieties of North American Pisidia. Vol. 19, No. 10, p. 

 118, 1906. 

 November snails. V'ol. 19, No. 8, p. 96, 1905. 

 Additional notes on Bifidaria pentodon and B. tappaniana. Vol. 

 ^,19, No. 12, p. 134, 1906. 

 ^New species of Pisidium. Vol. 20, No. 1, p. 5, 1906. 

 New species of Pisidium. Vol. 20, No. 2, p. 17, 1906. 

 On the pathology of Sphaerium. Vol. 20, No. 1, p. 11, 1906. 

 \\Sphaerium hendersoni n. sp. Vol. 20, No. 6, p. 69, 1906. 

 WNew Pisidia. Vol. 20, No. 8, p. 87, 1906. 

 \r\New Pisidia. Vol. 20, No. 9, p. 98, 1907. 

 A few notes on Say's early writings and species. Vol. 21, No. 3, 



p. 31, 1907. 

 Note on Tritogonia tuberculata Barnes. \'ol. 21, No. 4, p. 48, 



1907. 

 Pelseneer's Treatise on Mollusca. Vol. 21, No. 7, p. 80, 1907. 



88 



