524 PROCEEDINGS OF THE NATIONAL MUtl.'t'M. 



tTRUNCILLA BIEMARGINATA Lea. 



" Unio biemarginalux LEA., Pr. Ac. X. Sci. Phila., 1, 1857, p. 83; *J1. Ac. X. Sci. Phila., 



VI, 1866, p. 47, pi. xvi, fig. 45 ; * Obs., XI, 1867, p. 51, pi. xvi, fig. 45. 

 Mnriiaron (Unto) biemari/inaius Lea, Syn., 1870, p. 38. 



Tenoessee liiver drainage. 



tTRUNCILLA CAPSjEFORMIS Lea. 



* 1'nio capsd-formis LEA, Tr. Am. Phil. Soc., VI, 1834, p. 31, pi. n, fig. 4 ; * Obs., I, p. 

 143, pi. n, fig. 4." CONRAD, Moudg., VIII. 1837, p. 72, pi. XL, fig. 2.* FERUS- 

 SAC, Guer. Mag., 1839, p. 29.* HAXLEY, Test. Moll., 1842, p. 191, *Biv. Shells, 

 1843, p. 19. pi. xxi. lii,'. .",. *CATLOW and REEVE, Conch. Norn., 1845, p. 57. 

 KUSTER, Conch. Cab. Unio, 1852, p. 42, pi. vm, fig. 5. * CONRAD, Pr. Ac. 

 N. Sci. Phila., VI, 1853, p. 246.* H. and A. ADAMS, (Jen. Rec. Moll., II, 1857, 

 p. 493. "REEVE, Conch. Icon., XVI, 1864, pi. xvn, figs. 79, 79a, 79fr. 

 *P.*:TEL, Conch. Sain., Ill, 190, p. 147. 



"Margarita (Unio) capsa'formis LEA, Syn. ,1836, p. 24; 1838, p. 19. 

 Mnrgaron (Unlo) cajtunformis LEA, Syn., 1852, p. 27; 1870, p. 42. 



Tennessee River drainage. 



tTRUNCILLA FLORENTINA Lea. 



, Pr. Ac.X. Sci. Phila., VII, 1857, p. 83; Ml. Ac. X. Sci. Phila., 

 V, 1862, p. 61, pi. v, fig. 213; *Obs., VIII, 1862, p. 68, pi. v, fig. 213. *B. H. 

 WRIGHT, Check List, 1888. 



~ Mar ij aron ( Unio) Jlorcntinus LEA, Syn., 1870, p. 42. 



f'nio turgidulus LEA, Pr. Ac. N. Sci. Phila., II, 1858, p. 40; *J1. Ac. X. Sci. Phila., 

 V, 1862, p. 62, pi. v, fig. 211; * Obs., VIII, 1862, p. 66, pi. v, fig. 211.* REEVE, 

 Touch. Icon., XVI, 1864, pi. xvn, fig. 80.* P.ETEL, Conch. Sain., Ill, 1890, p. 

 170. 



* Margaron (Unio) turtjidnlua. LEA, Syn., 1870, p. 42. 



* Unlo nux KUSTER, Conch. Cab. Unio, 1861, p. 218, pi. LXXIII, fig. 2. 



* Unio sacculus REEVE, Conch. Icon., XVI, 1864, pi. xv, fig. 67. * ANTHONY, Am. 



Jl. Conch., I, 1865, p. 157, pi. xn, fig. 3. 



* Unio saccatus KUSTER, Conch. Cab., 1861, p. 263, pi. i.xxxix, fig. 2. *P^ETEL, 



Conch. Sam., Ill, 1890, p. 166. 



Tennessee River drainage; Cumberland River. 



tTRUNCILLA DEVIATA Reeve. 



* Unio deviati(8 } REEVE, Conch. Icon., XVI, 1864, pi. xv, fig. 61. ^ANTHONY, Am. 



Jl. Conch., 1, 1865, p. 156, pi. xn, fig. 2.* B. H. WRIGHT, Check List, 1888. 

 P.ETEL, Conch. Sam., Ill, 1890, p. 150. 



* Margaron (Unio) deviattis LEA, Syn., 1870, p. 42. 



Cumberland and Tennessee rivers. 



Genus MICROMYA (Agassiz, 18S2) Simpson. 



(Type, Unio fabaJis Lea.) 

 Micromya AGASSIZ, Arch, fiir Xat., 1852, p. 57. 



Shell triangular oval, solid, dark, feebly rayed with undulating lines; 

 beak sculpture almost wanting, consisting of a few feeble, doubly-looped 



'Reeve credits this name to Anthony's manuscript in Museum Cuming. 



