U N I 



Plate XC[. 



Species 4'Jl. (Copied from Lea.) 



Unio Oeiextalis. Uii. tosid crasunscuhi, di'pirssa, oh- 

 longo-elougaid, inccquilaleraU, lam, n'ltidd, liitni, 

 zatiis iHcremeuii angmik ftisco-mriiUliiis jiirtii, costd 

 nmhonali angidatd; ared pOHticd dorsali. /iris hiiiis 

 rudiaiUibiis, et radiis angustis ornatd ; nnlibus ri.v 

 ewi/ieii/iims, ad apices minute mididatis ; iiiargnnld 

 aihd • dentibus cardinalibiis compirssis hiiffivjiie ; la- 

 mellis laieralibm prodiwtis. 

 The OniENTAL Unio. Shell tliickisli, depressed, elou- 

 gnted-oblong, inequilateral, smooth, shining, dirty 

 yellow, painted with narrow green-brown zones of 

 increase ; umbonal ridge angular, hinder dorsal area 

 with two raised lines, and narrow rays ; beaks 

 scarcely projecting, with small undulations at their 

 tips; nacre white; primary teeth long and com- 

 pressed ; lateral lamellae produced. 

 Lea, Trans. Amer. Phil. Soc. ser. 2. vol. viii. (Obs. on 

 Unio, vol. iii. p. 59), pi. 18. f. 38. 

 U. producliis, Mousson, teste Philippi. 

 Ilah. .lava? 



As often happens, the figure and description do not 

 quite coincide. It is said to be yellow inclining to green- 

 ish-brown, with two yelloto rays on the posterior dorsal 

 area. U. prodiictus is described as of a uniform green- 

 ish-brown. 



Species 492. (Copied from Lea.) 



Unio Uutto.manus. Uii. tedd crassiiiscula, mbdepressd, 

 vulde inteqidlaierali, subeylindraced, in/erne relusd, 

 postice attemudd et siihbiaHgulaid , fused, incompiciu' 

 radiald (ill tnbidd niitem color videtur fusco-lidescens, 

 liiu'is nri'idibiis rnditd/is), area podlcd dorsali hdd el 

 jiliiiiiiliitd, iiiargarild alhd ; deiilibiis cnrdiiiaHbits per- 

 piiri'is ; lamdlis lideralibiis prodifclis, fennibiis, hand 

 riirra/ix. 



Dittiin's Umo. Shell thieki.sh, somewhat depressed, 

 very inequilateral, subcylindraceous, indented below, 

 alteiuKili'd and subbiangular behind, dark brown 

 with indistinct rays (in the Plate the colour seems 

 yellow-brown with the linear rays dark green), hinder 

 dorsal area broad and flattened, nacre white ; primary 

 teeth very small ; lateral lamellee produced, thin, not 

 curved. 



Lea, Trans. Am 



Unio, Noi. i 



Hab. Savannah, 



Allied to lulliculahis. 



Species 493. (Co|: 

 Unio follicvlatls. Uh. I 



d from Lea.) 



ti! ■iubl ir-i, drpr 



medio 



rriiii),.wbn/li,„l 



rnhh' 



ur.i.n/ale 



iiiferm relusd, pusliri' \i''iili'm,i'ii:!,ilii , ^ii^i'^thj,, 

 fiisco-nigresei'ide ; iiiiii''i's n.r r.,i: .in:! 'c. s, „/,//•./,(/■ 

 srppius purpurea ; dfiililiii\ <-:iri!niiilili:'y, purris. In 

 lis ; lamellis laleralibiis Uiiigis, paiiliilum ciircatis. 



The saddle-bagged Unio. Shell thinnish, deprcs: 

 (especially in the middle), subcylindraceous, very 

 equilateral, indented below, subbiangular behind, i 

 seulptnred, blackish-brown ; beaks scarcely proje 

 ing, nacre usually purple ; primary teeth small a 

 lobed ; lateral lamelhT long and very slightly curvi 



Lea, Trans. Amer. Phil. Soc. ser. 3. vol. vi. (Obs. 

 Unio, vol. ii. p. 38), pi. 1 1 . f . 33. 



JLab. Savannah river, Georgia, Anun-ica. 



Allied to Sliepardiaiins, and not inqirobably a you 

 variety. 



Species 494. (Coiiied from Lea.) 



Unio DaRIENSIS. Uu. teslii r,-,/vA//,x.-,-//, ni.i'unihderaH, 

 ublovgd, iii/enii' hand retu^^: . ,i,i!ir',' rn:,r.irii-tli-pri'\.-i.!. 

 postice iiijluld et biniiyiihild, licci, J'ii\i:o-lulcscenle, 

 obsolete radiatd ; eusld nmliuiiati elevatd, satis iicale 

 subcarinatu, posliir phmehilii -, untibns promiuidis. 

 plauidatis, viargaritii idhu ; liiMeilis lidrrulibus pro- 

 ductis. 



The Unio of DaKIEN. Shell thicki^h, inequilateral, nb- 

 long, not iiuleiited below, concavcly depressed iu 

 front, inflated and biangular behind, smooth, yellow- 

 ish-brown, obsoletely rayed ; umbonal ridge elevated, 

 rather sharply subcarinated, flattened behind ; beaks 

 rather prominent, flattened, nacre white; lateral la- 

 melliE produced. 



Lea, Trans. Amer. Phil. Soc. ser. 3. vol. viii. (Obs. on 

 Unio, vol. iii. p. 84). pi. 36. f. 61. 



Hab. Near Darien, Georgia, .Vmeriea. 



September, 1868. 



