34 CATALOGUE FAMILY UNIONIML 



locality noted is the lied river of the North at Pembina. U. asperriYnus, Lea, is 



a synonym. Here, also, group U. fragosus, U. spcciosus, U. forsheyi, and 77. 

 aplculatus. 



*Unio laevissimns, Lea. 



(Trans. Am. Phil. Soc., Vol III, Pi. XIII, Fig-. 23. As Symphynota Icevissima.) 

 Ohio to Nebraska; Kansas; to Trinity river, Texas. See under U. (jracllis. 

 Barnes. 



f Unio lamarckianus, Lea. 



(Trans. Am. Phil. Soc. 2nd Series, Vol. X., PL XVII, Fig. 20.) 

 Caddo and Washita rivers, Arkansas. Belongs in the group of 17. irrora- 



fM8. 



t Unio lawi, Lea. 



(Observations on the Genus Unio, Vol. XIII. PI. 2, Fig. 4.) 



East Tennessee and North Alabama. This species is a member of the clavus 

 group, and is confined to a comparatively small area in the Tennessee drainage 

 system. 



t Unio leuior, Lea. 



(Trans. Am. Phil. Soc., 2d Series, Vol. VIII, P . XII, Fir. 18.) 

 This, a member of the perplexus group, was described from Stone river, Ten- 

 nessee, and has not elsewhere been found. 



t Unio lens, Lea. 



(Trans. Am Phil. Soc., Vol. IV, Pi. VIII, Fig. 10) 



Ohio and Indiana; Elk river, Tennessee. This form is a synonym of U. cir- 

 culus* which see. 



t Unio lenticnlaris, Lea. 



(Observations on the Genus Unio, Vol. XIII, PI. IX, Fig. 27.) 

 Described from the Tellico river, east Tennessee. Specimens have been re- 

 ceived from Coal creek, Anderson county, Tennessee. The species groups with 

 r. (trycnteus. 



t Unio leslej i, Lea. 



(Jour. Acad. Nat. Scl. Phila. 2nd series, Vol. TV, PI. LVIII, Fig. 177.) 

 Kentucky and Tennessee. Groups with 77. clavus. 



CATALOGUE 26. 



