NO. 120&. SYNOPSIS OF THE NAIADES SIMPSON. 795 



t QUADRULA TUBERCULATA Rafinesque. 1 



* Obliquaria (Rotundaria) tuberculata RAFINESQUE, Ann. Gen. Sci. Brux., V, 1820, 



p. 103.* CHENU, Bib. Conch., 1st ser., Ill, 1845, p. 20. 



* Rotundaria tuberculata AGASSIZ, Arch, fiir Naturg., 1, 1852, p. 48. 



*Unio tuberculatus CONRAD, New F. W. Shells, 1834, p. 72. *SAY, Am. Conch., 

 VI, 1834.* FEKUSSAC, Guer. Mag., 1835, p. 28.* CONRAD, Monog., V, 1836, 

 p. 43, pi. xxn. * KUSTER. Conch. Cab.Unio, 1852, p. 45, pi. ix, fig. 1. * REEVE, 

 Conch. Icon., XVI, 1864, pi. in, figs. 9, 12. 



* Unio verrucosus BARNES, Am. Jl. Sci., VI, 1823, p. 123, pi. v, fig. 6. * SHORT and 



EATON, Transylvania JL, 1831, p. 75. *HANLEY, Test. Moll., 1842, p. 180; 

 * Biv. Shells, 1843, p. 180, pi. xxi, fig. 24. * CATLOW and REEVE, Conch. Norn., 

 1845, p. 65. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, p. 496. * CALKINS, 

 Pr. Ottawa Acad. Sci., 1874, p. 46.* B. H. WRIGHT, Check List, 1888. 

 *P,ETEL, Conch. Sam., Ill, 1890, p. 171. 



* Margarita ( Unio) verrucosus LEA, Syn., 1836, p. 16; 1838, p. 15. 



* Hargaron ( Unio) verrucosus LEA, Syn., 1852, p. 22; 1870, p. 34. 



* Unio verrucosus purpureus HILDRETH, Am. Jl. Sci., XIV, 1828, p. 281. 



* Nya verrucosa EATON, Zool. Text Book, 1826, p. 216. 



* Quadrula verrucosa BAKER, Moll. Chicago, Pt. 1, 1898, p. 85, pi. xxm. 



* Unio tuberculosa VALENCIENNES, Rec. Obs. Zool. Anat., II, 1833, p. 232. 



Mississippi drainage generally; southern Michigan ; San Saba County, 

 central Texas. 



tQUADRULA GRANIFERA Lea.- 



* Unio graniferus LEA, Tr. Am. Phil. Soc., VI, 1838, p. 69, pi. xix, fig. 60; * Obs., II, 



1838, p.69, pi. xix, fig. 60. *TROSCHEL, Arch, fiir Naturg., V, 1839, Pt. 2, p. 

 237. *HANLKY, Test. Moll., 1842, p. 180; *Biv. Shells, 1843, p. 180, pi. xxm, 

 fig. 11. * CATLOW and REEVE, Conch. Nom., 1845, p. 59. * CONRAD, Pr. Ac. 

 N. Sci. Phila., VI, 1853, p. 250. *H. and A. ADAMS, Gen. Rec. Moll., II, 1857, 

 p. 496. * CHENU, 111. Conch., 1858, pi. xxv, figs. 3, 3a, 36. * KUSTER, Conch. 

 Cab.Unio, 1861, p. 212, pi. LXX, fig. 4.* REEVE, Conch. Icon,, XVI, 1864, 

 pi. ix, fig. 34. *B. H. WRIGHT, Check List, 1888. *P,ETEL, Couch. Sam., 

 Ill, 1890, p. 154. 



^Margarita ( Unio) graniferus LEA, Syn., 1838, p. 15. 



*Margaron ( Unio) graniferus LEA, Syn., 1852, p. 22; 1870, p. 34. 



tQUADRULA GRANIFERA var. PUS ILL A Simpson.* 



Ohio, Cumberland, and Tennessee river systems; northwest to Iowa. 



1 Rafinesque's description is plainly that of one of the pustulous Unioues of the 

 Ohio, and the statement that it is truncated posteriorly, Avants nodules anteriorly, 

 is three or more inches long, and has a violet nacre makes it certain that it is the 

 rerrucosus of Barnes. 



"This form has been considered by many merely at best a variety of the tuberculata, 

 and I have so regarded it. It has always a smaller and generally a more inflated 

 shell, higher beaks, and usually a smoother, more olive-colored epidermis than the 

 latter. Its nacre is ordinarily more copper colored than that of tuberculata. I believe 

 with Mr. Wetherby that it is a valid species. 



3 A greatly dwarfed inflated form from the Green River at Mammoth Cave, Ken- 

 tucky, may bear the above name. 



