602 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XXH. 



fOBOVARIA ELLIPSIS Lea. 



* f Unio brevialis SOWERBY, Rec. and Foss. Shells, XVI, fig. (110 date). 



* Unio ellipsis LEA, Tr. Am. Phil. Soc., Ill, 1828, p. 268, pi. iv, fig. 4 ; * Obs., 1, 1834 ? 



p. 10, pi. iv, fig. 4. SHORT and EATON, Transylvania Jl., 1831, p. 75.* SAY, 

 Am. Conch. I, No. II, 1831.* DESHAYES, An. sans Vert., 2d ed., VI, 1835, p. 

 547 ; 3d ed., II, 1839, p. 672.* HANLEY, Test. Moll., 1842, p. 188 ; * Biv. Shells, 

 1843, p. 188, pi. xxi, fig. 7.* POTIEZ and MICHAUD, Gall. Moll., 1844, p. 150, 

 pi. LVIII, figs. 1, 2. *CATLOW and REEVE, Conch. Nona., 1845, p. 58. 



* CHENU, Bih. Conch., 1st ser., Ill, 1845, p. 22, pi. iv, tigs. 1, la, 16. * KUSTER, 

 Conch. Cab. Unio, 1852, p. 43, pi. vm, fig. 4. * CHENU, 111. Conch., 1858, pi. 

 xvni, figs. 1, la, 16.* H. and A. ADAMS, Gen. Rec. Moll.. II, 1857, p. 495. 



* SOWERBY, Conch. Icon., XVI, 1868, pi. LXXX, figs. 4, 24. * CALKINS, Pr. 

 Ottawa Acad. Sci., 1874, p. 42. * LATCHFORD, Tr. Ottawa Field Nat. Club, 

 1882, p. 50. *B. H. WRIGHT, Check List, 1888. * P^TEL, Conch. Sam. ,111, 

 1890, p. 151. 



* Margarita ( Unio) ellipsis LEA, Syn., 1836, p. 22; 1838, p. 18. 



* Margaron ( Unio) ellipsis LEA, Syn., 1852, p. 26; 1870, p. 41. 



* Unio triangularis SAY, Am. Conch., VI, 1834. 



* Unio olivarius CONRAD, New F. W. Shells, 1834, p. 70.* FERUSSAC, Goer. Mag., 



1835, p. 28. 



* Unio taitianus SOWERBY, Couch. Icon., XVI, 1868, pi. LXVII, fig. 338. 



* Uniopealei LEA, Pr. Ac. N. Sci. Phila., 1, 1871, p. 191 ; * Jl. Ac. N. Sci. Phila., VIII, 



1874, p. 26, pi. vm, fig. 23; *Obs., XIII, 1874, p. 30, pi. vm, fig. 23. * B. H. 

 WRIGHT, Check List, 1888. 



Upper Mississippi system as far south as the Tennessee and Arkansas 

 rivers; St. Lawrence drainage area. 



fOBOVARIA CASTANEA Lea. 



* Fnio castaneus LEA, Tr. Am. Phil. Soc., IV, 1831, p. 91, pi. xi, fig. 21 ; ' * Obs., I, 



1834, p. 101, pi. xi, fig. 21. * CONRAD, New F. W. Shells, 1834, p. 68. 



* FERUSSAC, Guer. Mag., 1835, p. 28.* HANLEY, Test. Moll., 1842, p. 188 ; Biv. 

 Shells, 1843, p. 188, pi. xxn, fig. 30. *CATLOW and REEVE, Conch. Norn., 

 1845, p. 57.* CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 246.* H. and A. 

 ADAMS, Gen. Rec. Moll., II, 1857, p. 495. * CHENU, 111. Conch., 1858, pi. xi, 

 figs. 5, 5a, 56.* B. H. WRIGHT, Check List, 1888.* P^TEL, Conch. Sam., Ill, 

 1890, p. 147. 



*Marf/arita (Unio) castaneus LEA, Syn., 1836, p. 22; 1838, p. 18. 



* Margaron (Unio) castaneus LEA, Syu., 1852, p. 26; 1870, p. 41. 



Streams flowing into the Gulf of Mexico, from the Alabama Eiver 

 west to the Nechez. 

 The following species are unflgured and indeterminable. 



*Obovaria cordata RAFINESQUE, Ann. Gen. Sci. Brux., V, 1820, p. 312, pi. LXXXII, 



figs. 6, 7. 

 *0bovaria stegaria RAFINBSQUE, Ann. Gen. Sci. Brux., V, 1820, p. 312, pi. LXXXII, 



figs. 4, 5. 



1 The name castaneus was applied to some Unio which I am unable to determine, 

 by Rafinesque in a continuation of a monograph on the Bivalve Shells of the River 

 Ohio, etc., in October, 1831. According to Scudder, Lea's name was published the 

 latter part of the same year, but I have no means of knowing which appeared first. 

 Under the circumstances I use Lea's name. 



