744 PROCEEDINGS OF THE XATTONAL MUSEUM. VOL.XXII, 



fUNIO ARATUS Lea. 



I'nio uratus LEA, Disc. 12 Uniones, 1843; *Tr. Am. Phil. Soc., IX, 1845, p. 282, pi. 

 XLII, fig. 12 ; * Obs., IV, 1848, p. 40, pi. XLII, fig. 12.* H. and A. ADAMS, Gen. 

 Rec. Moll., II, 1857, p. 493. * SOWERIJY, Concb. Icon., XVI, 1868, pi. LXIV, fig. 

 320. *B. H. WRIGHT, Check List, 1888. * P/ETEL, Conch. Sam.. 111,1890, 

 p. 144. 



* Margaron ( Unio) aratus LKA, Syu., 1852, p. 28 ; 1870, p. 35. 



Central America. 



fUNIO GRANADENSIS Lea. 



* Unio granadensis LEA, Pr. Ac. N. Sci. Phila., XII, 1868, p. 95; *J1. Ac. N. Sci. 



Phila., VI, 1868, p. 293, pi. XLII, fig. 103; * Obs., XII, 1869, p. 53, pi. XLII, fig. 

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



* Margaron ( Unio) granadensis LEA, Syn., 1870, p. 35. 



Lake Nicaragua. 



The following species are of Rafinesque, but 1 am utterly unable to 

 make anything out of them : 



Unio dilatata, elliptica, fasciata, fragilis, levigata, nervosa, viridis, 

 zonata, all in Monograph, 1820; also Unio bicolor, calendis, castaneus, 

 cMoris, diapkamis, fontinalis, fulvus, lasmabrachys, montanus, pallens, 

 platioluS) rivularis, rimosus, teneltws, venus, all in Continuation of 

 Monograph, 1831. 



Other indeterminate Unionidmof Kafinesque are: Amblema antrosa, 

 costata, gibbosa, olivaria, rubra, torulosa; Lasmonos fragilis; Obovaria 

 obovalis, pachostea; Obliquaria triangularis, attenuata, atroviolacea, 

 bidlata, cliffordiana, cuprea, cyplila, ellipsaria, fasciolaris, flava,flexuosa, 

 lateralis, lineolata, nodulata, obliquaia, pusilla, quadrula, sintoxia, sin- 

 uata, subrotunda, all in Monograph, 1820. Bariosta diploderma, pon- 

 derosus, mttatis; Epilobasma biloba; Toxolasma cinerescens, cyclips, 

 flexm, in Continuation of Monograph, 1831. 



The following are also indeterminate and spurious Unios : 



Unio tahetianus CATLOW and REEVE, Conch. Nom., 1845, p. 64. Is probably U. 



taitianus Lea. 



Unio largillierti PHILIPPI, Menke's Zeits., 1847, p. 94. 

 Unio musicus SPENGLER, Skriv. Nat. Selsk., Ill, 1793, p. 67. 

 Unio radula SAY, N. Harm. Diss., 1829, p. 323. 

 Unio plomlarius VILLA, Disp. Couch. Terr. Fluv., 1841, p. 62. 

 Unio pequottianus LINSLEY, Am. Jl. Sci., 1845, p. 277. 

 Unio iridescens CONRAD, Cov. of Monog. No. 11. 

 Unio angusta LAMARCK, An. sans. Vert., VI, 1819, p. 80. 

 Unio conus SPENGLKR, Skriv. Nat. Selsk., 1792. 

 Unio delpUnus SPENGLER, Skriv. Nat. Selsk., 1793, p. 63. 

 Unio doumcti LETOURNEUX and BOURGNIGNAT, Prod. Mai. Tunis., p. 163. 

 Unio distortits BEAN, Ann. and Mag., 1836, p. 376, fig. 53. 

 Unio iiber CONRAD, Am. Jl. Conch., II, p. 279. 

 Mya olorata SOLANDER, Portland Cat., p. 100. 



