524 PEOCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



tTRUNCILLA BIEMARGINATA Lea. 



*Uniohiemarginatiis'L^A.,VY.AG.^.'tsc'\.. Pbila., 1, 1857, p.83; *J1. Ac. N. Sci.Phila., 



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

 '"Margaron {Unto) Memar(jinahts Lea, Syn., 1870, p. 38. 



Tennessee Eiver drainage. 



tTRUNCILLA CAPS^FORMIS Lea. 



" Unio caijsceformis Lea, Tr. Am. Phil. Soc, VI, 1834, p. 31, pi. ii, fig. 4 ; " Obs., I, p. 

 143, pi. II, fig. 4. — " Conrad, Mouog., VIII, 1837, p. 72, pi. xl, fig. 2. — * Ferus- 

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

 1843, p. 19, pi. XXI, fig. 5. — "^ Catlow and Eeeve, Conch. Norn., 1845, p. 57. — 

 *KusTER, Conch. Cab. Unio, 1852, p. 42, pi', viii, fig. 5. — "* Conrad, Pr. Ac. 

 ]S[. Sci; Phila., VI, 18.53, p. 246.—" H. and A. Adams, Gen. Eec. Moll., II, 1857, 

 p. 493.— ^^Eeeve, Conch. Icon., XVI, 1864, pi. xvii, figs. 79, 79a, 796.— 

 *PiETEL, Conch. Sam., ill, 190, p. 147. 



^Margarita {Unio) capsaiformis Lea, Syn., 1836, p. 24; 1838, p. 19. 



^Margaron {Unio) capsoeformis Lea, Syn., 1852, p. 27; 1870, p. 42. 

 Tennessee Eiver drainage. 



tTRUNCILLA FLORENTINA Lea. 



* Unio floreniiniis Lea, Pr. Ac. Is". Sci. Phila., VII, 1857, p. 83 ; * Jl. Ac. N. 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 gar on { Unio) florentinus Lea, Syn., 1870, p. 42, 



* Unio iiirgidulus Lea, Pr. Ac. N. Sci. Phila., II, 1858, p. 40; '"Jl. Ac. N. Sci, Phila., 



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

 Conch. Icon,, XVI, 1864, pi. xvii, fig. 80.—* P.^tel, Conch. Sam., Ill, 1890, p. 

 170, 

 * Margaron {Unio) turgiclulus Lea, Syn., 1870, p. 42. 



* Unto nux Kuster, Conch. Cab. Unio, 1861, p, 218, pi, Lxxiii, fig. 2. 



* iTniosaccwZits Eeeve, Conch. Icon., XVI, 1864, pi. xv, fig. 67. — * Anthony, Am, 



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



* Unio saccatits Kuster, Conch. Cab., 1861, p. 263, pi. lxxxix, fig. 2. — *P^tel, 



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



Tennessee River drainage; Cumberland Eiver. 



tTRUNCILLA DEVIATA Reeve, 



* Unio deviatiis^ Eeeve, Conch. Icon., XVI, 1864, pi. xv, fig. 61. — ''Anthony, Am, 



Jl. Conch., 1, 1865, p. 156, pi. xii, fig. 2.—* B. H. Wright, Check List, 1888.— 

 P^tel, Conch, Sam., Ill, 1890, p. 150. 

 *' Margaron {Unio) deviatus Lea, Syn., 1870, p. 42, 



Cumberland and Tennessee rivers. 



Genus MICROMYA (Agassiz, 1852) Simpson, 



(Type, Unio fahalis Lea,) 



Micromya Agassiz, Arch, fiir Nat., 1852, p. 57. 



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

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



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



