NO. 1203. SY\IU'SIH or Till-: S. HADES ,S/.l//'.vo.Y. 



* t Unlo cirratHx LEA, Pr. Ac. N. Sci. Phila., Ill, 1873. p. 422 ; .11. Ac. N. Sci. Phila., 



VIII, 1874, p. 55, pi. xix, fig. 53; *Obs., XIII, 1874, p. 59, pi. xix, lig. 53. 

 *B. H. WRIGHT, Check List, 1888. 



* \Unio corneas LEA, Pr. Ac. N. Sci. Phila., Ill, 1873, p. 423; *J1. Ac. N. Sci. 



Phila., VIII, 1874, p. 59, pi. xx, fig. 58; *Obs., XIII, 1874, p. 63, pi. xx, fig. 



58. *B. H.WRIGHT, Check List, 1888. 

 *t Unio inrenustus LEA, Pr. Ac. N. Sci. Phila., Ill, 1873, p. 424; * Jl. Ac. N. Sci. 



Phila., VIII, 1874, p. 66, pi. xxn, fig. 62; *Obs., XIII, 1874; p. 70, pi. xxn, 



fig. 62.* B. H. WRIGHT, Check List, 1888. 

 *iArconaia procanuheriana PILSBRY, Nat. Canadienue, XX, 1890, p. 171; "Pr. Ac. 



N. Sci. Pbila., 1892, p. 132, pi. vn, figs. 4-6.' 



fUNIO COMPLANATUS var. JEJUNUS Lea. 



* Unio jejunus LEA, Tr. Am. Phil. Soc., VI, 1838, p. 9, pi. iv, fig. 9; *Obs., II, 



1838, p. 9, pi. iv, fig. 9. *TROSCHEL, Arch, fiir Xat., V, 1839, Pt. 2, p. 234. 

 *HANLEY, Test. Moll., 1842, p. 199; * Biv. Shells, 1843, p. 199, pi. xxn, fig. 

 47. "CATLOW aud REEVE, Conch. Noiu., 1845, p. 60.* CONRAD, Pr. Ac. N. 

 Sci. Phila., VI, 1853, p. 251.* H. and A. ADAMS, Gen. Eec. Moll., II, 1857, p. 

 493. * KUSTER, Conch. Cab. Unio, 1862, p. 265, pi. xc, fig. 1. *?SOWERBY, 

 Couch. Icon., XVI, 1868, pi. LXVIII, fig. 347. 2 * B. H. WRIGHT, Check List, 

 1888. P^TEL, Conch. Sam., Ill, 1890, p. 155. 



* Margarita ( Unio) jejunus LEA, Syn., 1836, p. 30; 1838, p. 22. 



* Margaron (Unio) jejunus LEA, Syu., 1852, p. 32; 1870, p. 51. 



*MJnio percoarctatus LEA, Pr. Ac. N. Sci. Phila., I, 1857, p. 85; *.T1. Ac. N. Sci. 

 Phila., V, 1862, p. 59, pi. HI, fig. 206; * Obs., VIII, 1862, p. 63, pi. in, fig. 206. 

 *SOWERBY, Conch. Icon., XVI. 1866, pi. LIV, fig. 277.* B. H. WRIGHT, Check 

 List, 1888. *P^:TEL, Conch. Sam., Ill, 1890, p. 163. 



* Margaron ( Unio) percoarctatus LEA, Syu., 1870, p. 51. 



fUNIO COMPLANATUS var. QUADRILATERUS Lea. 



* Unio squalidus LEA, in part, Pr. Ac. N. Sci. Phila., VII, 1863, p. 192; Jl. Ac. N. Sci. 



Phila., VI, 1866, p. 22, pi. vn, fig. 20; Obs., XI, 1867, p. 26. pi. vn, fig. 20.* B. 

 H. WRIGHT, Check List, 1888.* SIMPSON, Pr. U. S. Nat. Mus., XV, 1892, p. 429, 

 pi. LXXI, fig. 14. 



* Margaron ( Unio) sqitalidna LEA, Syn., 1870, p 51. 



* t Unio quadi-ilaterus LEA, Pr. Ac. N. Sci. Phila., VII, 1863, p. 192; Jl. Ac.N. Sci. 



Phila., VI, 1866, p. 5, pi. i, fig. 1; Obs., XI, 1867, p. 9, pi. i, fig. 1. *B. H. 

 WRIGHT, Check List, 1888. 



* Margaron (Unio) quadrilaterus LEA, Syn., 1870, p. 51. 



Atlantic drainage from the St. Lawrence to Georgia; west in the 

 British possessions to Manitoba? 



tUNIO CATAWBENSIS Lea. 



* Unio ivheatleyi LEA, Pr. Ac. N. Sci. Phila., 1857, I, p. 85 ; 3 * Jl. Ac. N. Sci. Phila., 



V, 1861, p. 54, pi. i, fig. 200; Obs., VIII, p. 58, pi. i, fig. 200.* B. H. WRIGHT, 

 Check List, 1888. *P.ETEL, Conch. Sam., Ill, 1890, p. 147. 



* Margaron ( Unio) catawlensis LEA, Syn., 1870, p. 52. 



1 Said to come from Yamaska River, China. The type is a twisted Unio complanatiiH, 

 probably from Canada. 



2 In errata he savs this is depressus of d'Orbigny, not Lamarck. It is hard to say 

 what it is. 



'Preoccupied by Lea and changed by him to cataivbensis. 



