Taylor, G. W. 1893. "Land and Fresh Water Shells in the Rocky Moun- 

 tains." Nautilus, vol. 7, pp. 85-86, Dec., 1893. 

 (Records fourteen species of terrestrial mollusks from Laggan, 



Alberta.) 



1895. "The Present Condition of Canadian Conchology." Ottawa 

 Naturalist, vol. 8, pp. 143-159, Feb., 1895. 



(Contains a valuable bibliography.) 

 1895a. "The Land and Freshwater Shells of Alberta." Ottawa 



Naturalist, vol. 9, pp. 173-178, Dec., 1895. 



(Records Vertigo ovata and Pupa simplex from Laggan, and Conulus 

 fuhms, Patula striatella, and Succinea avara from near Macleod and 



Little Bow river, Alberta.) 



Vanatta, E. G. 1906. "British Columbia Shells." Nautilus, vol. 20, p. 95. 

 Dec., 1906. 

 (Records twelve species of terrestrial mollusks from Field, B.C., and 



- five from Banff, Alberta.) 



Whiteaves, J. F. 1905. "Some New Localities for Canadian Land and 

 FreshWater Shells." Ottawa Naturalist, vol. 19, pp. 169-171, 

 Dec., 1905. 



(Records Vertigo modesta from Kananaskis, Alberta, and Sphyradium 

 edentulum from Kananaskis, Alberta, and near Tobacco plains, B.C.) 

 1906. "Notes on Some Land and Fresh Water Shells from British 

 Columbia." Ottawa Naturalist, vol. 20, pp. 115-119, Sept., 1906. 

 (Records Polygyra ptycophora from Crowsnest pass and Trail, B.C.) 



NOTES ON THE SPECIES REPRESENTED 

 Polygyra ptycophora (A. D. Brown 1870) 



1870. Helix ptycophora Brown, Journ. de Conch., (3), vol. 10, p. 392 



(teste Binney). 

 1885. Arionta townsendiana var. ptycophora Binney, Man. Am. Landsh., 



pp. 128, 129, f. 102. 

 1897. Polygyra townsendiana ptycophora Pilsbry, Nautilus, vol. 11, p. 94 



(merely catalogued). 



1905. Polygyra ptycophora Dall, Land and Freshwater Moll. Alaska, 



p. 25 (brief note). 



1906. Polygyra ptycophora Whiteaves, Ottawa Nat., vol. 20, p. 119 



(recorded from Crowsnest pass and Trail, B.C.). 



Material Examined 



358132 



