NO. 1205. SYNOPSIS OF THE NAIADES— STilPSOK 713 



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

 related groups. ^ 



tUNIO BUCKLEYI Lea. 



* Uniobuckleyi,IjF.A,Desc. of 12Unioues, 1843 (no pagination) ; *Tr. Am. Phil. Soc, 



IX, 1845 % p. 276, pi. XXXIX, iig. 2 ; * Obs., IV, 1848, p. 34, pi. xxxix, fig. 2.— 

 * Conrad, Pr. Ac. Nat. Sci. PMla., VI, 1853, p. 245.—* H. and A. Adams, Gen. 

 Kec. Moll., II, 1857, p. 493.—* Kuster, Concli. Cab. Unio, 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. 



* Mar gar on ( Unio) huckleyi Lea, Syn., 1852, p. 30; 1870, p. 48. 



"iUnio hiiddianus Lea,^ Desc. of 12 Unioues, 1843; Tr. Am. Phil. Soc, IX, 1845, 1 

 p. 277, pi. XL, fig. 5; *Obs., IV, 1848, p. 35, pi. XL, fig. 5. — *(Jonrad, 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. lxxxi v, 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^tel, Conch. Sam., Ill, 

 1890, p. 146. 



* Margaron ( Unio) huddianus Lea, Syn., 1852, p. 32 ; 1870, p. 52. 



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

 *B. H. Wright, Check List, 



t UNIO BUCKLEYI var. ORCUTTII S. H. Wright. 

 * Unio orcuttii S. H. Wright, West. Am. Sci., IV, 1888, p. 60, 3 figs.* 

 Florida. 



t UNIO JAYENSIS Lea. 



*Uniojayensis Lea, Tr. Am. Phil. Soc, VI, 1838, p. 28, pi ix, fig. 23;-^ *Obs., IL 

 1838, p. 28, pi. IX, fig. 23.—* Troschel, Arch, fiir Naturg., V, 1839, Pt. 2, p. 

 235.— * Hanley, Test. Moll., 1842, p. 206; *Biv. Shells, 1843, p. 206, pl.xxii, 

 fig.53. — *Catlow and Reeve, Couch. Nom., 1845, p. 60. — ^Conrad, Pr. Ac. 

 N. Sci. Phila., VI, 1853, p. 251.— *1-I. and A. Adams, Gen. Rec. Moll., II, 1857, 

 p 491.—* Chenu, 111. Conch., 1858, pi. xxii, figs. 4, 4a, 4&. — * Sowerby, Conch. 



'The relationship between the Bucldeyi, Crassidens, Complanatus, Bowniei&n& i^/sfi- 

 enami<.5 groups is very close. That of Crassidens is characterized by inflated shells 

 with a strong posterior ridge, and wrinkles on the j)osterior slope; of BucMeyi 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 group have elongated, generally compressed, thin 

 shells, pointed hehind, 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. 



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

 anterior part, and is truncated a little there. 



^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. huckleyi the two species ap-. 

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



