THE NAUTILUS. 131 



1874. Jickeli, C. F. Fauna Land und Susswasser Mollusken 

 Nord-Ost Afrikas. 



1872. Mousson, A. Revision de la Faune Malacologique des 

 Canaries. 



1902. Ortmann, A. E. The Geographical Distribution of 

 Freshwater Decapods, and its bearing upon Ancient Geography. 

 Proc. Am. Phil. Soc., XLI, pp. 267-400. 



1904. Pallary, Paul. Quatrieme Contribution a 1'etude de la 

 faune malacologique du Nord-ouest de PAfrique. Jour, de Conch., 

 LII, pp. 1-58. 



1909. Pallary, Paul. Catalogue de la Faune Malacologique 

 d'Egypte. Mem. L'Inst., Egypt, VI. 



1894-1900. Taylor, J. W. Monograph of the Land and Fresh- 

 water Mollusca of the British Isles, I. 



1878. Wollaston, T. V. Testacea Atlantica. 



1904. Walker, Bryant. Notes on Eastern American Ancyli. 

 NAUTILUS, XVIII, pp. 75-83. 



1912. Walker, Bryant. A Revision of the Ancylida? of South 

 Africa. NAUT., XXV, pp. 139-144. 



1885. Westerlund, C. A. Fauna der Palaearctischen Region, V. 



UNION OF THE WABASH AND MAUMEE DRAINAGE SYSTEMS. 



BY CALVIN GOODRICH. 



If only as a matter of record, it may be worth while to set down 

 the fact that the drainage of the Great Lakes and that of the Ohio 

 became united in the great flood of March-April, 1913. 



A little southwest of Fort Wayne, Ind., the St. Mary's River, 

 tributary to the Maumee, approaches within three miles of the Little 

 Wabash River, belonging to the Ohio system. The land between is 

 known as " The Prairie " and the dividing line of the two drainage 

 basins upon it is not perceptible to the human eye. It was across 

 this stretch that the St. Mary's River sent its flood waters last spring, 

 and no doubt it was responsible in no small measure for the damage 

 wrought at Peru and Logansport some distance down the Wabash. 



The Wabash and Erie canal, now many years abandoned, skirted 



