U N I 



Species 313. (Miw. S,,uii-l.y.l 

 L'NIO SfOIUNA'lL-s. T'l,. tr^tii uniln-rijluiil nirm. inigiisia, 



dkurimth ruguhl, iiil»>> imUnn »//„/»y/,7/, ,ln,iihi,>i 

 parvis ; latere poslirn jimihicfn, huirijhiihun ilursnli el 

 hitemli arcuiifiiii (leelinhut, trn,iiiio iienmiiiuli), i.uir- 

 (jhie venlrali rvct'iMciilo ; lulere imtieo hreci, siihro- 

 tiDiilo, ambotdbiis pleiiia. 

 The sculptueed Unio. Shell oviite-cvlimJricul, narrow, 

 tumid, blaokish, wrinkled with tubercles and tiibercu- 

 lateJ diverging ribs, within pale-snlinon, with small 

 teeth ; posterior side produced, dorsal and lateral mar- 

 tcius sloped in a curve, end acuminated, ventral margin 

 ratlier straii^ht ; anterior side short, rather rounded, 



l.KA, (Jl)s. on Uiiiii 

 II„h. ^iani. 



I. 13. 



Species 31-I-. (Mus. Sowerby.) 



I'nio oiilENS. Uil. lestd elonijatn, suhoviitii, tenni, mih- 

 roiiipresM, pailldi' virkll, ohlique (iiitire el mei/io 

 fiHciis (jldiqiii^ et piist n,i,j,iln„i J)iM-},i hit,i, niiliuhi, 

 iiitwi alhida, tlenliljus tniiiiljiis ; lulrre po>^tii-o oljln/ne 

 uiiijnlnto, margiue dormli hrevi, redo, nwri/ine lateral i 

 obliqiio, termino acmiiinato, maryiiw veiitruli bijluli) ; 

 latere aiitico mhproducto, itiarylne dorsnli recto, cii- 

 iieato, imboidl/iin teniiiter llrato-undaths. 



Thk kising sun Unio. Shell elongated, subovate, tliin, 

 subcompressed. pale green, rayed witli obli()ue bands 

 in the front and n-iitiv, :iii,l ,me bn.ad WVm<.\ \\\r 

 angle, white uillim, teeth thin; posterior side ol)- 

 iitpiely angular, dorsal margin short, straight, lateral 

 margin oblique, end acuminated, ventral margin in- 

 flated ; anterior side somewhat produced, dorsal mar- 

 gin straight, cuueate. umbues tiurlv uudidatilv 

 rhlged. 



Le.\, Obs. on Unio, vol. i. p. S.'i. pi. (!. t'. 1. 



Ilah. lliver Ohio. 



The tine linear character of the undulations on the uni- 

 boes, and the elongated, depressed form, distinguish this 

 shell sufficiently from I'ldo pielontiii. 



Species 315. i.Mus. llanley.) 



Unio PrEVOSTI.AXUS. I'n. tenlii vompresm, Huhoratd. 

 olivficed, fasciU viridllmx irreijiil(ird)iis iiilerriiptis 

 niitire teniiibiis poatici liilioribiia nnliiild, inlits e,erii- 

 led, deidibua aiiticls tenidbiis, ponticis iinllix : liiU-re 

 pontirii lalo, e.vpauso, obloiii/o, mari/iiie dorsah siiii- 

 arciiato, lerm'mo mdjrotmido, iiianjhie ceiilrali iiiflato. 

 uiedio (UHjiistato, iiiiiboidbiis roiripreasis, ciipreis, Ireci- 

 i/ath ; latere antico aiigudato, brecimcnlo, rotiuidu. 



I'revost's Unio. Shell compressed, subovate, olive, 

 rayed with green, irregular, interrupted bauds, which 

 are auteriorly thin, posteriorly wide, inside blue, with 

 thin anterior and no posterior teeth ; posterior side 

 broad, expandeil, oblong, dorsal margin slightly 

 arched, end rather round, ventral margin inflated, 

 middle narrow, uiiibors copper-coloured, smooth ; 

 anterior side narrow, rather shm-t, round. 



Lea, Obs. on Unio, vol. v. p. ;2.J. pi. I'.i. f. 31. 



Uab. Entowah river, Georgia. 



Species 31 G. (Mus. Sowerby.) 



UXIO PICTIS. I'll, teiild redd, diUuujn-eUi piled, solldd, 

 liihiidd, hvdijald, uiiliir. cniirnilnn) rei/ald, ob.ieiui' 

 Htramiued, radiis ijblii/id.i luterniptis pktd, iiitiis aii- 

 iice crassd, nlbd, postice tenni iridescei/ti, deittibii>! 

 .iolidii ; latere poslieo eluiit/ato, termino aciiiiiiiinto, 

 margiue ventrali cequaliter couoexo, umbonihits Ueri- 

 biis, Iiaud proiidiientibiis ; latere antico rotundato. 



The i'aisted Unio. Shell straight, oblong-elliptical, 

 solid, tumid, smooth, concentrically wrinkled in 

 front, dull straw-colour, painted with oblique inter- 

 rupted rays, inside tliick in front, white, thin iri- 

 descent posteriorly, teeth solid; posterior sicli- 

 lengthened, end acuminated, ventral margin equally 

 convex, umboes smooth, uot prominent; anterior 

 side rounded. 



Lea, Obs. MH Unin. vol. i. p. ISo. pi. 11. f. 32. 



IM. ILirprth ruvr, Tmiiessce. 



Species 317. (:\Lis. Taylor.) 

 UxiO OCUHAfErs. I'n. Ie,ld omtd. leiini, liijlatd. he, 



.lauuarv, ISGS. 



