The writer is under obligation to the authorities of the Victoria Mem- 

 orial Museum not only for the privilege of working over the material, but 

 for the preparation of the excellent photographs utilized as illustrations. 

 He must further acknowledge his indebtedness to Frits Johansen, of Ottawa, 

 for much help in tracing lost material, items of literature, and stray data. 

 Acknowledgment is likewise due J. B. Tyrrell of Toronto for certain speci- 

 fic information concerning the specimens collected by him. 



BIBLIOGRAPHY 



The following bibliography is intended to include only such items as 

 possess special interest in connexion with the fauna studied, or which con- 

 tain references -to specimens from the region of the Canadian Rockies. 



Berry, S. S. 1919. "Mollusca of Glacier National Park, Montana." Pro- 

 ceedings Academy Natural Sciences Philadelphia, 1919, pp. 195-205, 

 text f.l, pi. 9-10/Nov., 1919. 



Binney, \V. G. 1885. "A Manual of American Land Shells." Bulletin 28, 

 United States National Museum, pp. 1-528, text f.1-516, 1885. 



Ball, W. H. 1905. "Land and Freshwater Mollusks of Alaska and Adjoin- 

 ing Regions." Harriman Alaska Expedition, vol. 13, pp. i-xii, 

 1-171, text f.1-118, pi. 1-2, New York, 1905. 



Dawson, G. M. 1875. "Land and Freshwater Mollusca, Collected During 

 the Summers of 1873-1874, in the Vicinity of the Forty-ninth 

 Parallel Lake of the Woods to the Rocky Mountains." British 

 North American Boundary Commission, Report on the Geology and 

 Resources of the Region in the Vicinity of the Forty-ninth Parallel, 

 etc., Appendix E, pp. 347-350, 1875. 

 (Helix limitaris n. sp. described from Waterton lake, Rocky mts.) 



Pilsbry, H. A. 1897-1898. "A Classified Catalogue of American Land 

 Shells, with Localities." Nautilus, vol. 11, pp. 45-48, 59-60, 71-72, 

 83-84, 93-96, 105-108, 117-120, 127-132, 138-144, Aug., 1897-April, 

 1898. 



1899. "Notes on a Few Northwest American Land Snails." Pro- 

 ceedings Academy Natural Sciences Philadephia, 1899, pp. 314-315, 

 text f.l -3, 1899. 



(Describes Vertigo gouldii lagganensis var. nov. and records Pupa 

 decora from Laggan, Alberta.) 



Pilsbry, H. A., and Vanatta, E. G. 1900. "A Partial Revision of the Pupa 

 of the United States." Proceedings Academy Natural Sciences 

 Philadelphia, 1900, pp. 582-611, text f.1-2, pi. 22-23, Dec., 1900. 

 (Records and figures Vertigo modesta from Laggan, Alberta.) 



Pilsbry, H. A. 1916. "Notes on the Anatomy of Oreohelix, with a Cata- 

 logue of the Species." Proceedings Academy Natural Sciences 

 Philadelphia, 1916, pp. 340-359, text f.lA-B, pi. 19-22, June, 1916. 

 1918-1920. "Pupillidffi (Gastrocoptinse, Vertigininse)." Manual 

 Conchology, (2), vol. 25, pp.i-ix, 1-401, text figs., pi. 1-34, Nov., 1918- 

 April, 1920. 



Shimek, B. 1901. "Pyramidula ahimekii (Pilsbry) Shimek." Bulletin 

 Laboratories Natural History State University Iowa, vol.5, pp. 139- 

 170, April, 1901. 



