DKS MOIXES ACADEMY OF SCIENCE. 



I Unio estabrookianus, Lea. 



(Trnn-. Am. I'hil. Boc.. 2ml Series Vol. A', PL VI, Fijr. 17.) 



Clinch. Holston, and Elk rivers. Tennessee. Groups with I'. <mjcnt<-nx, 

 \\ hich see. 



f Unio fahalis, Lea. 



(Trans. Am. Phil. Soc., Vol. IV, PI. X, Fig. 16.) 



Ohio. Indiana, and Tennessee. Say's 7'. lapillus is synonymous with this 

 species. 





 t U. fascinans, Lea. 



(Jour. Acad. Nat. Sci. Phil., 2nd Series, Vol. VI, PI. XL VII, Fig. iis.) 

 Holston river, Virginia and Tennessee; Chattooga river, north Georgia. 

 This species is a member of that very extensive group typified by 77". aryentcu*. 



f Unio fat in is, Lea. 



(Trans. Am. Phil. Hoc., 2cl Series, Vol. VIII, PI. XI, Fi<i. U.) 

 "Holston river, east Tennessee. Groups with U. iris, which see. 



1 Unio fiavidus. Lea. 



(Observations on the Genus Unio, Vol. XIII, PI. 9, Fig-. 23.) 



Clinch, Holston and Tennessee rivers. This so-called species is very close to 

 /'. tu.wicnibiensis being a member of the same group. See under 77. edgariu- 



n MX. Lea. 



t Unio florentimis, Lea. 



(Jour. Ai-ail. Nat. Sci. Phil.. 2d S<-ri's. Vol. V., PI. V, Fig. 2113. > 

 Tennessee river, Alabama, near Florence, probably Muscle Shoals. A female 

 of this form, from the Cumberland river, Tennessee, bearing the identification 

 of the author of the species, has passed in review. It groups with /*. i>n-f)tc.i'us, 

 Lea. 



I Unio folintus, Hild. 



(Figured?) 



Described from the Ohio river. Specimens have been submitted from the 

 Holstnn river, at Knoxville, Tennessee. 



21. 



