DES MO1NES ACADEMY OF SCIENCE. 31 



f- I'nio glaher, Lea. 



(Trans. Am. Phil. Soc., Vol. VI, PI. X., Fig. 29.) 



This is a member of the irix group, was described from the Holston river, 

 Tennessee, and has not been reported from elsewhere. 



* Unio glamlaceiis, Lea. 



(Jour. Acad. Nat. Sci. Phila. Vol. V, PI. IX, Fig. 2^6.) 



This species \vas described from the Cahawba river, Alabama. Specimens 

 credited to Arkansas, by Dr. Lea, and collected by Prof. B. Powell, have passed 

 in review. See under U. argenteus, Lea. 



f Uiiio uluns Lea. 



(Trans. Am. Phil. Soc., Vol. IV., PI. VIII, Fig. 12.) 



Ohio and Indiana, south to the Kentucky and Green Rivers, and Tennessee 

 drainage system. 77. corvunculus, Lea, of Alabama and Georgia, appears to be 

 closely related to this species 



t Unio global us. Lea. 



(Observations on the Genus Unio, Vol. XIII, PL I, Fig-. 1.) 



Credited to the Holston river, in east Tennessee and to the Etowah river, in 

 north Georgia. See under 77 ebenus. Lea. 



* Unio gradlis, Barnes. 



(Figured ?) 



This species has a wide range from Ottawa river, Canada; to Centra) New 

 York; Tuscumbia, Alabama, in the Tennessee river and Spring creek; to Michi- 

 gan : Kansas; and south to Texas. It is one of the few alate species of Unio. 

 See under U. (flatus, Say. 



:}: Unio graudidens, Lea. 



(Jour. Acad. Nat. Sci. Pliil., Snd Series Vol. V, PI. XXX, Fig. 274.) 

 Hot Springs, Arkansas, the only reported locality. It belongs to the vustu- 

 inxiiN group, and is not far removed from 77. cooperianus, Lea. 



*Unio prranifcrus, Lea. 



(Trans. Am. Phil. Soc., Vol. VI, PI. XIX. Fig. 60.) 



Ohio to Iowa, Mississippi river. The species been often received under the 

 immp of 77. vcrrucosus, Barnes, but is an entirely distinct form. Both ait- 

 related to the pustulosus group, but distinguished readily by their purple nacre. 



CATALOGUE 23. 



