NO. 1205. svxorsis OF TUI-: \.u.trtES-STMPsnN. 713 



of many shades. Animal not differing especially from that of closely 

 related groups. * 



t UNIO BUCKLEYI Lea. 



* Uniobuckleyi, LEA, Desc. of 12 Uniones, 1843 (no pagination); *Tr. Ani. Phil. Soc., 



IX, 1845 ?, p. 276, pi. xxxix, tig. 2; *Obs., IV, 1848, p. 34, pi. xxxix, fig. 2. 

 * CONRAD, Pr. Ac. Nat. Sci. Phila., VI, 1853, p. 245.* H. and A. ADAMS, Gen. 

 Rec. Moll., II, 1857, p. 493.* KUSTER, Conch. Cab. T'nio, 1861, p. 177, pi. LVI, 

 fig. 2. *SOWERBY, Conch. Icon., XVI, 1866, pi. xxxiv, fig. 175. *B. H. 

 WRIGHT, Check List, 1888.* B. H. and S. H. WRIGHT, Conch. Ex., II, 1888, 

 p. 95. *P.ETEL, Conch. Sam., Ill, 1890, p. 146. * SIMPSON, Pr. U. S. Nat. 

 Mus., XV, 1892, p. 417, pi. LVIII, figs. 6, 7; LIX, figs. 1, 2; LX, fig. 2. 



* Margaron ( Unio) buckleyi LEA, Syn., 1852, p. 30; 1870, p. 48. 



*t Unio buddianus LEA,* Desc. of 12 Unioues, 1843; Tr. Ain. Phil. Soc., IX, 1845,? 

 p. 277, pi. XL, fig. 5; *Obs., IV, 1848, p. 35, pi. XL. tig. 5. * CONRAD, Pr. Ac. 

 Nat. Sci. Phila., VI, 1853, p. 245.* H. and A. ADAMS, Gen. Rec. Moll., II, 1857, 

 p. 492. * KUSTER, Conch. Cab. Unio, 1861, p. 249, pi. LXXXIV, fig. 1.* REEVE, 

 Conch. Icon., XVI, 1865, pi. xx, fig. 88. * B. H. and S. H. WRIGHT, Conch. Ex., 

 II, 1888, p. 95. *B. H. WRIGHT, Check List, 1888.* P.ETEL, Conch. Sam., Ill, 

 1890, p. 146. 



* Margaron ( Unio) buddianits LEA, Syn., 1852, p. 32; 1870, p. 52. 



*t Unio dalli B. H. WRIGHT, 3 Pr. Ac. N. Sci. Phila., 1888, p. 119, pi. vi, fig. 1. 

 *B. H.WRIGHT, Check List, 1888. 



t UNIO BUCKLEYI var. ORCUTTIl' S. H. Wright. 



* Unio orcuttii S. H. WRIGHT, West. Am. Sci., IV, 1888, p. 60, 3 tigs.< 

 Florida. 



tUNIO JAYENSIS Lea. 



* Unio jatjensis LEA, Tr. Am. Phil. Soc., VI, 1838, p. 28, pi ix, fig. 23; s *Obs., II. 



1838, p. 28, pi. ix, fig. 23. *TROSCHEL, Arch, fiir Xaturg., V, 1839, Pt. 2, p. 

 235. * HANLEY, Test. Moll., 1842, p. 206; * Biv. Shells, 1843, p. 206, pl.xxn, 

 fig. 53. ^CATLOW and REEVE, Conch. Norn., 1845, p. 60. ^CONRAD, Pr. Ac. 

 N. Sci. Phila., VI, 1853, p. 251.* H. and A. ADAMS, Gen. Rec. Moll., II, 1857, 

 p 491. * CHENU, 111. Conch., 1858, pi. xxn, tigs. 4, 4a, 4fe. * SOWERBY, Conch. 



1 The relationship between the Buckleyi, Crassidens, Complanatus, Downiei and Fish- 

 erianus groups is very close. That of Crassidens is characterized by inflated shells 

 with a strong posterior ridge, and wrinkles on the posterior slope; of Buckleyi by a 

 less developed ridge, the absence of strong wrinkles, and a rich, warm texture 

 of shell; of Complanatus by trapezoidal, not greatly inflated shells of dull texture. 

 The species of the Fisherianus gronp have elongated, generally compressed, thin 

 shells, pointed behind, and of the Downiei assemblage solid, inflated shells. But 

 there are many species that are quite negative in characters, and others that com- 

 bine the features of two or more groups, that can not be satisfactorily placed. 



2 The type is a large, badly eroded shell, apparently a little injured at the upper, 

 anterior part, and is truncated a little there. 



3 The type is a small, old shell, which has become rough and arcuate. 



"Credited to Manatee River, Florida, Simpson and Miakka Lake, Florida, New- 

 comb, by Mr. Wright. I have never found it in the Manatee River, but obtained it 

 in abundance in Miakka Lake. 



"'Although the type is very different from that of U. luckleyi the two species ap- 

 proach BO closely that there are specimens which I can not name. 



