520 rpocEEiuyGS OF THE XATIO\AL MUSEUM. 



tTRUNCILLA SULCATA Lea. 



* Unto snlcattts LEA, Tr. Am. Phil. Soc., Ill, 1830, p, 430, pi. vin, fig. 2. "SAY, 



Am. Conch., No. 1, 1830, pi. v. SHORT and EATON, Transylvania .11., 1831, 

 p. 75. *LEA Obs., I, 1834, p. 44, pi. vin, fig. 12. *HANI.EY, Test. Moll., 1842, 

 p. 188; *Biv. Shells, 1843, p. 188. *CHEXU, Bib. Conch., 1st ser., Ill, 1845, p. 



II, pi. I, figs. 5, 5a. *CATLOW ami REEVE, Conch. Nom., 1815, p. 64. *CHEXU, 



III. Conch., 1858, pi. xm, figs. 3, 3a, 3fc. *H. and A. ADAMS, Gen. Rec. Moll., 

 II, 1857, p. 496. 'REEVE, Conch. Icon., XVI, 1864, pi. xiv, fig. 60. *P.KTKL, 

 Conch. Sam., Ill, 1890, p. 169. 



* Margarita (Unio). sulcatus LKA, Syn., 1836, p. 22; 1838, p. 18. 

 *Margaron (Uio) sulcattis LEA, Syn., 1852, p. 26; 1870, p. 40. 



* J'nio siilcata DESHAYES, An. sans Vert, 2d ed., VI, 1835, p. 548; 3d ed., II, 1839, 



p. 672. 



J'nio rMibitndus SAY, New Harm. Diss., II, 1829, p. 308; * Am. Conch., I, 1830, pi. 

 v. SHORT and EATON, Transylvania Jl., 1831, p. 75. "CONRAD, New 

 F. W. Shells, 1834, p. 71. *CHENU, Bib. Conch., 1st ser., Ill, 1845, p. 11, pi. I, 

 fig. 6. *KUSTKR, Conch. Cab. Unio, 1862, p. 276, pi. xcm, fig. 2. "REEVE, 

 Conch. Icon., XVI, 1864, pi xv, fig. 63. 



* rnio ohU(jiiatii8 SAY, Am. Conch., VI, 1834. "CONRAD, New F. W. Shells, 1834, p. 



70. "KrsTER, Conch. Cab., 1862, p. 274, pi. xcn, fig. 3. *AGASSIZ, Arch, fiir 

 Xatm-g., I, 1852, p. 43. *COXRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 253. 



*Unio gibbosiis var. perobUfjUHa CONRAD, Monog., VI, 1836, p. 50, pi. xxvir, fig. 2. 



Unio pernbliquus CONRAD, Cover of Monog., VIII, 1837. 



*Unio pectittis CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 255; Jl. Ac. N. Sci. 

 Phila., 1854, p. 297, pi. xxvn, fig. 4. 



TRUNCILLA SULCATA var. DELICATA Simpson.' 



Ohio River drainage; the variety in the Detroit River and southern 

 Michigan. 



(Group of Trun cilia liaysiana.) 



Shell shining, round-oval; posterior part of both male and female 

 distinctly radially sculptured. 



tTRUNCILLA HAYSIANA Lea. 



* Unio haysianns LEA, Tr. Am. Phil. Soc., V, 1833, p. 35, pi. in, fig. 7 ; *Qbs., I, 1834, 



p. 147, pi. in, fig. 7. *HAXLEY, Test. Moll., 1842, p. 188; *Biv. Shells, 1843, p. 

 188. *CATLOW and REEVE, Conch. Nom., 1845, p. 59. *COXRAD, Pr. Ac. N. 

 Sci. Phila., VI, 1853, p. 250. *KUSTER, Conch. Cab. Unio, 1856, p. 209, pi. i.xix, 

 fig. 4. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 495. *REEVE, Conch. 

 Icon., XVI, 1864, pi. xv, fig. 62. *P.ETEL, Conch. Sam., Ill, 1890, p. 154. 



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

 *Margaron ( Unio) hat/statins LEA, Syn. 1852, p. 26; 1870, p. 41. 

 *ScaJenaria haysiana AGASSIZ, Arch, fiir Naturg. I, 1852, p. 48. 



* Unio sowerbyanus LEA, Tr. Am. Phil. Soc., V, 1839, p. 68, pi. x, fig. 28; 2 *Obs. I, 



1834, p. 180, pi. x, fig. 28. "FERUSSiC, Guer. Mag., 1835, p. 29. * CONRAD, 



'Mr. Bryant Walker has sent me specimens of a form which I refer to this species 

 that are smaller and in every way more delicate. I propose the above varietal 

 name for it. 



2 Male of T. liaysiana. Unio Juu/aiciniis and U. sowerbyanus were published in the 

 same paper, the former having precedence. 



