Bibliography 



Viviparus contectoides in Philadelphia. Vol. 26, No. 7, p. 84, 1912. 

 Cincinnatia in the Delaware Drainage. Vol. 26, No. 8, p. 96, 

 1912. 



A Pleistocene deposit in Santo Domingo. Vol. 27, No. 10, p. 120, 

 1914. 



Land shells of Sussex County, New Jersey. Vol. 28, No. 1, p. 11, 

 1914. 



Modiolus demissus Dillwyn and var. granosissimus Sby. Vol. 28, 



No. 3, p. 35, 1914. 

 Notes on Ranella lampas. Vol. 28, No. 7, p. 80, 1914. 

 Two new varieties of Valvata. Vol. 28, No. 9, p. 104, 1915. 

 Gonidea angulata Lea. Vol. 28, No. 12, p. 143, 1915. 

 Lymnaea {Pseudosuccinea) columella Say, in Oregon. Vol. 29, 



No. 5, p. 60, 1915. 

 Notes on Oliva. Vol. 29, No. 6, p. 67, 1915. 

 Venezuela shells. Vol. 29, No. 7, p. 82, 1915. 

 Pupoides inornatus. Vol. 29, No. 8, p. 95, 1915. 

 Florida shells. Vol. 29, No. 12, p. 143, 1916. 

 Opeas mauritianum Pfr. Vol. 30, No. 1, p. 12, 1916. 

 Bifidaria Clementina oldroydae n. var. Vol. 30, No. 4, p. 48, 1916. 

 New Jersey shells. Vol. 30, No. 6, p. 72, 1916. 

 North Carolina shells. Vol. 31, No. 2, p. 71, 1917. 

 Gonave Island shells. Vol. 32, No. 2, p. 72, 1918. 

 Land shells of southern Florida. Vol. 33, No. 1, p. 18, 1919. 

 Opeas pumilum Pfr. in Philadelphia. Vol. 33, No. 1, p. 31, 1919. 

 Land shells of Laurel Springs, New Jersey. Vol. 33, No. 2, p. 67, 



1919. 



Polygyra plana bahamensis Van., n. var. Vol. 33, No. 2, p. 72, 

 1919. 



Land shells of Maine. Vol. 33, No. 3, p. 96, 1920. 

 Land shells of Beaver County, Pennsylvania. Vol. 34, No. 1, p. 

 28, 1920. 



Shells of Orlando, Florida. Vol. 34, No. 1, p. 31, 1920. 

 Land shells of Southern Florida. Vol. 34, No. 3, p. 93, 1921. 

 Shells of Zion National Park, Utah. Vol. 34, No. 4, p. 140, 1921. 

 Vanatta, Edward G. and Pilsbry, Henry Augustus 

 On Bifidaria and its allies. Vol. 19, No. 11, p. 121, 1906. 

 See also Pilsbry and Vanatta 



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