536 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



* Unio virginiana Lamarck, An. sans. Vert., VI, 1819, p. 79.— *Delessert, Eec, 



Coq. Lam., 1841, pi. xii, fig. 

 " Unio Ziweate Valenciennes, Enc. Meth., II, 1827, p. 151, pi. ccxlviii, fig. 5. 



* Unio elongata Goodrich, 111. Nat. Hist., II, 1829, p. 523, fig. 



* Unio tenebrosus Conrad, New F. W. Shells, 1834, p. 42, pi. a'ii, fig. 1; p. 72.— 



* Ferussac, Guer. Mag., 1835, p. 29.—* Moller, Syn. Nov. Gen. 1836, p. 207.— 

 *Chenu, Bib. Conch., 1st ser., Ill, 1845, pi. ii, fig. 5.— * B. H. Wright, 

 Check List, 1888.—* P.etel, Conch. Sam., Ill, 1890, p. 169. 



* Unio melinus Conrad, Monog. XI, 1838, p. 101, pi. lv, fig. 1.— Sowerby, Conch. 



Icon., XVI, 1868, pi. lxxxvii, fig. 467. 



* Unio melUnus P.etel, Conch. Sam., Ill, 1890, p. 159. 



* Unio loydianus Lea, Pr. Am. Phil. Soc, I, 1840, p. 286; * Tr. Am. Phil. Soc.,VIII, 



1843, p. 216, pi. XVI, fig. 32; ' Obs., Ill, 1842, p. 54, pi. xvi, fig. 22.—* De Kay, 

 Zool. of New York, Pt. 5, 1843, p. 189.—* Conrad, Pr. Ac. N. Sci. Phila.,VI, 

 1853, p. 245.— -H. and A. Adams, Gen. Eec. Moll., II, 1857, p. 492.— * Chenu, 

 111. Conch., 1858, pi. xxxii, figs. 2, 2a, 2Z).— * B. H. Wright, Check List, 

 1888.— * PiETEL, Conch. Sam., HI, 1890, p. 146. 

 * Margaron (Unio) loydianus Lea, Syn., 1852, p. 38; 1870, p. 62. 



* Unio crassus Kuster, Conch. Cab. Unio., 1854, p. 113, pi. xxxi, fig. 5. 

 *Mya oblongata, Wood, Index Test., 1856, p. 199, pi. i; Supplement, fig. 2. 



' Unio obliquiradiatus Eeeve, Conch. Icon., XVI, 1865, pi. xxix, fig. 151. — *P..E- 

 tel, Conch. Sam., Ill, 1890, p. 161. 



fLAMPSILIS RADIATUS var. CONSPICUUS Lea. 



* Unio conspicuvs Lea, Pr. Ac. N. Sci. Phila., II, 1872, p. 156; * Jl. Ac. N. Sci. 



Phila., VIII, 1874, p. 34, pi. xi, fig. 31; *Obs., XIII, 1874, p. 38, pi. xi, fig. 



31.—* B. H. Wright, Check List, 1888. 



St. Lawrence drainage; Manitoba; Atlantic region south to North 



Carolina (var. imispicuus in ]!^orth Carolina and southern Virginia). 



Gould ^ reports L. radiatus from the north shore of Lake Superior, 



and there is a shell in the U. S. National Museum from the northwest 



boundary of Wisconsin which is probably this species. 



tLAMPSILIS HYDIANUS Lea. 



* Unio hydianus Lea, Tr. Am. Phil. Soc, A^, 1838, p. 14, pi. \i, fig. 14; *Obs., 



II, 1838, p. 14, pi. VI, fig. 14.— *Troschel, Arch, fiir Naturg., VII, 1839, p. 

 234.— * Hanley, Test. Moll., 1842, p. 192; Biv. Shells, 1843, p. 192, pi. xxiii, 

 fig. 6. — *Catlow and Eeeve, Conch. Nom., 1845, p. 60. — "Kuster, Conch. 

 Cab. Unio., 1861, p. 201, pi. lxvii, fig. 2.—* Chknu, 111. Conch., 1858, pi. xvii, 

 fig. 3, 3a, 3& ; pL xxiv, figs. 7, 7a, 7&.— * H. and A. Adams, Gen. Eec. Moll., II, 

 1857, p. 494.— * Sowerby, Conch. Icon., XVI, 1866, pi. xxxvii, fig. 203.— *B. 

 H. Wright, Check List, 1888.—* P.etel, Couch. Sam., Ill, 1890, p. 155. 



* Margarita ( Unio) hydianus Lea, Syn., 1836, p. 25 ; 1838, p. 19. 



* Margaron ( Unio) hydianus Lea, Syn., 1852, p. 28; 1870, p. 44. 



* Unio placHus Lea, Pr. Am. Phil. Soc, V, 1852, p. 252 ; 2 * Tr. Am. Phil. Soc, 1852. 



p. 279, pi. xxiii, fig. 38; *Obs.,V, 1852, p. 35, pi. xxiii, fig. 38.— * Conrad, 

 Pr. Ac N. Sci. Pbila., VI, 1838, p. 255.—* H. and A. Adams, Gen. Eec Moll., 

 II, 1857, p. 494.— * Kuster, Conch. Cab. Unio., 1861, p. 262, pl.LXXXViii, fig. 

 2.—* B. H. Wright, Check List, 1888.—* P.etel, Concli. Sam., 1890, p. 163. 

 "" Margaron ( Unio) jylacitus Lea, Syn., 1852, p. 29; 1870, p. 46. • 



Eastern half of Texas; Indian Territory; Arkansas; east to Ala- 

 bama. 



Agassiz, Lake Superior, p. 245. '^jyierely a youug hydianus. 



