NO. 1205. SYNOPSIS OF THE NAIADES SIMPSON. 779 



Phila., IV, 1858, p. 65, pi. xi, fig. 47; * Obs., VI, 1858, p. 65, pi. xi, fig. 47. 

 *SOWERBY, Conch. Icon., XVI, 1868, pi. LXXVIII, fig. 405. *B. H. WKIGIIT, 

 Check List, 1888. *P.KTEL, Conch. Sain., Ill, 1890, p. 46. 



* Margaron ( Unio) llandianns LEA, Syn., 1870, p. 33. 



Western Georgia; Alabama in the Gulf drainage. 

 (Group of Quadrula pustulosa,.) 



Shell round quadrate, truncated behind, full and angled back of the 

 ligament; beaks high; beak sculpture a few coarse ridges which are 

 swollen at the somewhat rounded posterior ridge; surface generally 

 more or less pustulous but sometimes entirely smooth and in some 

 cases slightly corrugated; epidermis often having a broad, faint, green 

 ray; hinge strong; nacre white or purple. 



Animal with the marsupium occupying all four gills throughout; 

 inner gills the larger, free the whole or the greater part of their length 

 from the abdominal sac; branchial opening having clustered, often 

 branching, papilla?. 



f QUADRULA PUSTULOSA Lea. 



* Unio pustulosus LEA, Tr. Am. Phil. Soc., IV, 1831, p. 76, pi. vn, fig. 7; * Obs., I, 



1834, p. 86, pi. vn, fig. 7. * FERUSSAC, Guer. Mag., 1835, p. 28. * HANLEY, 

 Test. Moll., 1842, p. 180; * Biv. Shells, 1843, p. 180, pi. xxi, fig. 34. CATLOW 

 and REEVE, Conch. Nom., 1845, p. 63. * H. and A. ADAMS; Gen. Rec. Moll., II, 

 1857, p. 496. * CHENU, 111. Conch., 1858, pi. xxm, figs. 2, 2a, 26. * CALKINS, 

 Pr. Ottawa Acad. N. Sci., 1874, p. 44.* B. H. WRIGHT, Check List, 1888. 



* Margarita (Unio) pustulosus LEA, Syn., 1836, p. 15; 1838, p. 15. 



* Margaron (Unio) pustulosus LEA, Syn., 1852, p. 22; 1870, p. 33. 



* Quadrula pustulosa BAKER, Moll. Chicago, Pt. 1, 1898, p. 86, pi. xxv, fig. 2; 

 xxvin, fig. 13. 



* Unio verrucosa VALENCIENNES, Rec. Obs. Zool. Anat., II, 1833, p. 231, pi. LIII, 



fig. 2. 



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



*Unio prasinus CONRAD,' New F. W. Shells, 1834, p. 44, pi. in, fig. 1, p. 71. 



* FERUSSAC, Guer. Mag., 1835, p. 29. * MOLLER, Syn. Nov. Gen., 1836, p. 

 208. * CONRAD, Monog., IX, 1837, p. 79, pi. XLIV, fig. 2. "CiiENU, Bib. 

 Conch., Istser., Ill, 1845, p. 22, pi. m, fig. 1.* CONRAD, Pr. Ac. N. Sci. 

 Phila., VI, 1853, p. 255. * REEVE, Conch. Icon., XVI, 1864, pi. vn, figs. 26, 

 26a, 266.* B. H. WRIGHT, Check List, 1888. 



* Unio bvllatus var. prasinus P.-KTEL, Conch. Sam., Ill, 1890, p. 146. 



*Unio bullatus CONRAD, New F. W. Shells, 1834, p. 68; Monog., X, 1838, p. 82, 

 pi. XLV, fig. 2. * KUSTER, Conch. Cab. Unio, 1852, p. 47, pi. ix, fig. 3. 



* CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 245. * REEVE, Conch. Icon., 

 XVI, 1864, pi. xn, fig. 43.* P.ETEL, Conch. Sam., Ill, 1890, p. 146. 



*Unio dorfeiiillianus LEA, Tr. Am. Phil. Soc., VI, 1838, p. 73, pi. xvn, fig. 54; 

 *Obs., II, 1838, p. 73, pi. xvn, fig. 54. *TROSCHEL, Arch, fur Naturg., V, 

 1839, II, p. 237. * HANLEY, Test. Moll., 1842, p. 179; *Biv. Shells, 1843, p. 

 179, pi. xxm, fig. 10. * CATLOW and REEVE, Conch. Nom., 1845, p. 58. 



* CONRAD, Pr. Ac. N. Sci. Phila., VI, 1853, p. 248.* H. and A. ADAMS, Gen. 

 Rec. Moll., II, 1857, p. 497. *CHENU, 111. Conch., 1858, pi. xxv, figs. 5, 5a, 56. 



* REEVE, Conch. Icon., XVI, 1864, pi. x,fig. 38.* B. H. WRIGHT, Check List, 



1 A smooth form of pustulosus, according to the type in Philadelphia Academy. 



