110 MARINE AND FISHERIES 



5 GEORGE v., A. 1915 



E. 14. Lines of growth not regular, coarse, with numerous fine 

 between. 



Sphaerium striatinum. 

 D. 14. Beaks calyculate. 



E. 15. Rhomboidal in outline. 



Sphaerium {Musculium) partumeium. 

 C. 8. Shell trigonal in outline 

 Genus Pisidium. 



Pisidium virginicum. 



LIST OF ARTICLES CONSULTED IN THE DETERMINATION OF THE FOREGOING 



SPECIES. 



1898. Baker, F. C. — The Mollusca of the Chicago Area. The Chicago Academy of Sciences, (Natu- 

 ral History Survey) ; Bulletin No. Ill, Pt. I. 1898. 



1902. Baker, F. C— The Mollusca of the Chicago Area, The Chicago Academy of Sciences, (Natural 

 History Survey) ; Bulletin No. Ill, Pt. II. 1902. 



1911. Baker, F. C. — The Lymnseidae of North and Middle America. The Chicago Academy 

 of Sciences: -Special Publication No. 3, 1911. 



1865. BiNNEY, W. G. — Land and Fresh-water Shells of North America, Pts. II and III. Smith- 

 sonian Miscellaneous Collections: (143, 144) vol. VII, 1867. 



1870. BiNNEY, W. G.— Report of the Invertebrata of Massachusetts (A. A. Gould, edited by 

 Binney) Boston, 1870. 



1901. Crandall, O. a. — The American Physse, Nautilus, 1901. 



1905. Dall, W. H. — Land and Fresh- water MoUusks. Harriman Alaska Expedition, vol. XIII, 

 New York, 1905. 



1882. Latchford, F. R. — Notes on the Ottawa Unionidse, Transactions Ottawa Field Naturalists' 

 Club, No. 3, Ottawa, 1881-82. 



1865. Prime, T. — Monograph of American Corbiculidae. Smithsonian Miscellaneous Colleciiunc. 

 (145) vol. VII, 1867. 



1858. Say, T.— The Complete Writings of Thos. Say on the Conchology of the United States. 

 Edited by W. G. Binney, New York, 1858. 



1900. Simpson, Chas. T. — Synopsis of the Naiades or Pearly Fresh- Water Mussels. Proceedings 

 of the U. S. National Museum: vol. XXII, Washington, 1900. 



1873. Tryon, G. W., Jr.— Land and Fresh-water Shells of North America, Pt. IV, Smith- 

 sonian Miscellaneous Collections (253) vol. 16; Washington 1873. 



