DES MOINES ACADKMV OF SCIENCE. 33 



ami Ilolston rivers, Tennessee, and in the Tennessee river, near Tuscumbia, 

 north Alabama 



f Unio interrnptus Lea. 



(Trans. Am. Phil. Soc., Vol. VI, PI. VI, Fig-. 15.) 



llarpeth river. Tennessee. This species is a member of the litjd.nu'nthinN 

 group. 



f Unio iris, Lea. 



Trans. Am. Phil. Sue., Vol. Ill, PI. IX, Fig. 18.) 



This species ranges from western New York to Michigan; to Illinois; and 

 south to Rock Castle creek, Kentucky. 77. novi-eborad, Lea, is probably a 

 synonym, but not the sole one. The form may be considered the type of a con- 

 siderable group which, among others, includes U. novi-eboracl, U. muhlficltli- 

 (tuus, U. simus, U zeiyleriunus, and 77. cumberlandiainLS. The type came 

 from the Ohio river, near Cincinnati. 



t Unio irroratus, Lea. 



(Tra'.is. Am. Phil. Soc., Vol. Ill, PI. V. Fig. 5.) 



The type upon which this species is based came from the Ohio river, near Cin- 

 cinnati. Thence it ranges to Illinois; south to Tuscumbia, Alabama, and Hols- 

 ton river, east Tennessee. 



t Unio jonesii. Lea. 



(Jour. Acad. Nat. Sci. Phil., Vol. IV, PL LlV,Fi-. 1H4.) 



The locality of the type of this species is Euharlee creek, Georgia. It occurs 

 in Swamp creek, north Georgia; at Asheville, North Carolina; in creeks, Mon- 

 roe county, Tennessee; and in the Elk river, north Alabama. It is a member of 

 the iris group. 



f Unio kirtliindianus, Lea. 



(Trans. Am. Phil. S :>c., Vol. V, Pi. XIV, Fig-. 41.) 



The type of this species which is closely related to U. coccineus, Ilildreth 

 was derived from the Mahoning river, Ohio. Examples have been seen credited 

 to Grand river, Michigan, and Waukesha, Wisconsin. 



fUnio laclirymosus, I.ca. 



(Tnuis. Am. Phil. Soc., Vol. Ill PI. VI, Fig. 8.) 

 Ohio river, near Cincinnati, to Kansas river, at Topeka. ' The most northerly 



