Bibliography 



An arboreal Polygyra. Vol. 31, No. 1, p. 36, 1917. 

 Polygyra albolabris maritima in Massachusetts. Vol. 31, No. 3, 

 p. 108, 1918. 



Helix nemoralis at Knoxville, Tennessee. Vol. 31, No. 3, p. 108, 

 1918. 



Some Philippine shells. Vol. 32, No. 2, p. 58, 1918. 

 The land Mollusca of the Belgian Congo. Vol. 34, No. 3, p. 102, 

 1921. 



Notes on Craspedopoma liicidum and other Madeira shells. Vol. 



34, No. 4, p. 113, 1921. 

 The genus Plebecula Lowe. Vol. 34, No. 4, p. 133, 1921. 

 Cockerell, T. D. A. and Cooper, Mary 



Notes on Ashmunella. Vol. 15, No. 10, p. 109, 1902. 

 Collinge, Walter E. 



On the occurrence of A rion fascia ins Nilss. in America. Vol. 13, 

 No. 1, p. 9, 1899. 

 Colton, Harold S. 



Land shells of Mount Desert, Maine. Vol. 17, No. 9, p. 99, 1904. 

 Sexual dimorphism in Strombns pugilis Linne. Vol. 18, No. 12, 

 p. 138, 1905. 



Some notes on living Strombns pugilis Linne. Vol. 19, No. 8, 

 p. 85, 1905. 



Results of a statistical study of variation in the blue shells of 



Pecten nucleus irradians found at Atlantic City, New Jersey. 



Vol. 28, No. 5, p. 52, 1914. 

 On classification in general, and the genus Lymnaea in particular. 



Vol. 28, No. 10, p. 116, 1915. 

 A provisional key to the subgenera and species of North American 



Lymnaeidae, Vol. 28, No. 10, p. 119, 1915. 

 Conner, Charles H. 



Margariiana margaritifera in Pennsylvania. Vol. 18, No. 8, p. 91, 



1904. 



Glochidia of Unio on fishes. Vol. 18, No. 12, p. 142, 1905. 

 The gravid periods of Unios. Vol. 21, No. 8, p. 87, 1907. 

 Supplementary notes on the breeding seasons of the Unionidae. 

 Vol. 22, No. 10, p. Ill, 1909. 

 Cooke, A. H. 



In Memoriam,— M. H. Crosse. Vol. 12, No. 9, p. 104, 1899. 



27 



