550 FBOCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



''Catlow and Eeeve, Conch. Nona., 1845, p. 61. — *Chenu, 111. Conch., 1858, 

 pi. XVII, figs. 1, Iffl, 15.—* H. and A. Adams, Gen. Eec. Moll., II, 1857, p. 494.— 

 *KusTER, Conch. Cab. Unio, 1861, p. 220, pi. lxxiv, fig. 3. — ''P.etel, Conch. 

 Sam., Ill, 1890, p. 161. 



^Margarita ( Unio) obscurus Lea, Syn., 1836, p. 26 ; 1838, p. 20. 



*Margaron ( Unio) oiscurus Lea, Syn., 1852, p. 29; 1870, p. 45. 



"" Margarita (Unio) zeiglerianus Lea, Syn., 1836, p. 26; 1838, p. 20. 



* Unio zeiglerianml^^A,T\. Am. Phil. Soc.,VI, 1838, p. 32, pi. x, fig. 27; *Obs.,n, 



1838, p. 32, pi. x, fig. 27.— -Troschel, Arch. fiirNaturg., V, 1839, Pt.2, p.235.— 

 'IlANLEY, Test. Moll., 1842, p. 193, * Biv. Shells, 1843, p. 193, pi. xxii, fig. 57.— 

 *Catlow and Reeve, Conch. Nom., 1845, p. 65. — *H. and A. Adams, Gen. 

 Eec. Moll., ir, 1857, p. 495.— *Chenu, III. Conch., 1858, pi. xxiv, figs. 2,2a, 

 21.—* SowERBY, Conch. Icon., XVI, 1866, pi. xxxvi, fig. 19. — * B. H. Wright, 

 Check List, 1888.— P^etel, Conch. Sam., Ill, 1890, p. 172, 



* Margaron ( Unio) zeiglerianus Lea, Syn., 1852, p. 29; 1870, p. 45. ^ 



Tennessee and Cumberland river systems; Lower Ohio and its tribu- 

 taries. 



ILAMPSILIS PRATTII Lea. 



*Unio prattii Lea, Pr. Ac. N. Sci. Phila., II, 1858, p. 166; * Jl. Ac. N. Sci. Phila., 

 IV, 1859, p. 206, pi. XXIV, figs. 88, 88a; *0b8., VII, 1859, p. 24, pi. xxiv, fig. 

 88.— "B. H. Wright, Check List, 1888. 



* Margaron ( Unio) prattii Lea, Syn., 1870, p. 45. 



Chattaboochee Eiver, Georgia. 



ILAMPSILIS VAUGHANIANUS Lea. 



* Margarita {Unio) vaughanianus Lea, Syn., 1836, p. 39;- 1838, p. 25. 



*Unio vaughanianus Lea, Tr. Am. Phil. Soc, VI, 1838, p. 5, pi. in, fig. 5; *0b8., 



II, 1838, p. 5, pi. Ill, fig. 5.— *Troschel, Arch, fur Naturg., V, 1839, Pt. 2. p. 

 234.— 'Hanley, Test. Moll., 1842, p. 208; *Biv. Shells, 1843, p. 208, pi. xxii, 

 fig. 48.— ** Catlow and Reeve, Conch. Nom., 1845, p. 65.— ** Conrad, Pr. Ac. 

 N. Sci. Phila., VI, 1853, p. 259.—* Chenu, 111. Conch., 1858, pi. xxi, figs, lla, 

 ll?,._*n. and A. Adams, Gen. Eec. Moll., II, 1857, p. 491.— *B. H. Wright, 

 Check List, 1888.— *P.etel, Conch. Sam., Ill, 1890, p. 171. 



* Margaron {Unio) vaughanianus Lea, Syn., 1852, p. 38; 1870, p. 61. 



Near Camden, South Carolina. 



ILAMPSILIS OGEECHEENSIS Conrad. 



* Unio ogeecheemis Conrad, Ann. and Mag. N. Hist., IV, 1849, p. 300; Jl. Ac. N. Sci. 



Phila., 1, 1850, p. 275, pi. xxx vii, figs. 3, 4 ; * Pr. Ac. N. Sci. Phila., VI, 1853, p. 

 254. 



* Unio prevostianus Lea, Tr. Am. Phil. Soc, X, 1852, p. 269, pi. xix, fig. 24 ; *Obs., V, 



1852, p. 25, pi. XIX, fig. 24.— *CoNRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 255.— 

 *H. and A. Adams, Gen. Eec. Moll., II, 1857, p.494.— *Musgrave, Phot. Conch., 

 1863, pi. II, fig. 10.— *B. H. Wright, Check List, 1888.— *P^tel, Conch. Sam., 



III, 1890, p. 164. 



*Margaron { Unio) prevostianus Lea, Syn., 1852, p. 29 ; 1870, p. 44. 



* Unioi)roximus Lea, Pr. Am. Phil. Soc, V, 1852, p. 252; *Tr. Am. Phil. Soc, X, 1852, 



1 1 believe that the L. oiscurus is only the fully adult form of U. zeiglerianus, which 

 when quite young shows very delicate and beautiful rays. 



-In this case, owing to delay in the publication of the transactions, the name 

 appeared in the Synopsis first, and under the generic name Margarita. 



