U N I . 



Plate XXX [\. 



Species 313. (Mus. Cuming.) 



UniO ZICZAC. Uii. ledn ova/a, leevi, siibcomp rensd , inliis 

 albido-siihcmriileu, exliis obscure olivacea, viridi ra- 

 diiifd, radils amjnhdim strigatis, latere autico brevi. 

 lata, rotimdo, luedio paiilo 'injhtio, latere postico ehm- 

 rjato siibaiigidato, ob/i/ji'e tninrato, marffine dorsali 

 declh-i. 



The zigzag Unio. Shell ovate, sinnotli, subcoinpressrd. 

 hluish-white, obscurely olive witliout, rayed witli 

 green, rays angularly striped, anterior side short, 

 wide, round, middle a little inflated, posterior side 

 elongate, with a slight angle, obliquely truncated, 

 dorsal margin sloping. 



Lea, Unio, vol. i. p. :>i. t. 12. f. 19. 



Bab. South Carolina. 



The ligzag markings upon the il 

 cause it to resemble U. duiinrif)iri,ii 

 shell, and is not pointed or beake 



ttalte 

 It i 



obliquely truncated. 



Species 214. (Mus. Cuming.) 



Unio donaciformis. Un. testa s/ibovali, snb'wjlatd. iii- 

 tiis albd, exlus l/soigatd, luted, olivaceo radiald, radiis 

 aiujidathm strigatis, latere autico rotundo, hreviusculo, 

 medio inflaio, latere postico cuneiformi, siibrostrato, 

 biaiigulato, marghie superiori perobliquo. 



The donaciform Unio. Shell suboval, somewhat in- 

 flated, white within, smooth, yellowish and olive- 

 rayed without, rays angularly striped, anterior side 

 rounded, rather short, middle inflated, posterior side 

 cuneiform, subrostrated, biangulated, upper margin 

 very obli(pic. 



Lea, Unio, vol. i. ]>. 1). t. t. f. ?,. 



Hnb. Eiver Ohio. 



Marked with a pretty zigzag pattern, with the ijc)>lcrior 

 side wedge-shaped, 



Species 315. (Mus. Cuming.) 

 1 xio GR.\CIL1S. Un. testa magna, irijlatu, tenia, subalnld, 

 hevi(j<itd, concentriee undulatd, int/is rosescenti, deiili- 

 liiix liiiiiiniformibus, extus luted, postice utiifasciatd, 

 lalerr autico brevi, subacuminato, angusto, medio sub- 

 iiijliitd, latere postico infiato, lata, ehngato, teriiiiiio 

 xiiljrohiiido, margiae dorsali elevato, cunealo. 

 The graceful Unio. Shell large, inflated 



alatrd, smooth, eoucrutrioally utidulatrd. n,.,- 

 within, teeth laniiuirurui, yellou willioul, nil 

 band behind, anterior side short, -ub.u uiui 

 narrow, middle slightly inflated, pii^irrior sli 

 flatcd, wide, elongate, the end rather round, 

 margin ek-vated, cnneate. 

 Barnes, Sillinian's American .lournal of Science. 



Unio fnujUiti, Snainson ? 

 Ilab. River Ohio. 



A fine large shell, with the external appearance 

 Aniiddi. It is of a delicate pinky tint within. The 

 cuticle is generally of a light yellowish colour, v 

 dark-green l)a,ud behind the posterior angle. 



of an 

 outer 

 ith a 



sub- 



fuscn 

 fi, ri) 

 ijiihild 



Specie, -iU;. (Mus. Cuming.) 



Unio Vanvxi'.mk.nsis. I'//, testa obtmigd, solidd, 

 nigrescent I, iiiliis piirjinred, latere antico bre 

 tundo, mediii iiijlaln, Inlere postico oblongu, binii 

 mnrgine veidrati siibcoiicavo, termino Iniiii-iihi 

 gine durso-Iaterali declivi, viargiiic dnrsnii revli 



Vanu.xem's Unio. Shell oblong, solid, blaeki-h- 

 purple within, anterior side short, round, mid 

 fiated, posterior side olilong, biangular, venlri 

 gin slightly concave, the end truncated, d(irv(], 

 margin sloping, dorsal margin rather straight. 



Lea, Uido, vol. ii. pi. 2. f. 31. 



llah. Rivi'r Cumberhnid, Tennessee. 



Species 217. (Mus. Cuming.) 

 Unio stramineus. Un. ti-sld ocnli, subcompressd, teimi, 

 concentric!^ sublirntii. inlns ulhii, extus pallide luted, 

 postice lineis viridis rmUnlii, latere autico brevi, laio, 

 subrotundo, medio inflali', laU-re postico elongato, mnr- 

 gine dorsali eleralu, cinieatn, margine dorso-laferali 

 ryine postico-renlrali ele- 



declivi, termino triuicalu, mi 

 vato. 

 The straw-coi.ouueu Unio. 



hell oval, rnthrr eoi 

 ightly wrinkled, »li 

 , nuiiated with -re 

 lines at the back, anterior side short, wide, mnn.li- 

 inflated in the middle, posterior siili' long, diir-al ni: 

 gill elevated, cuneale, dorso-lateral margin >U<\)\] 

 the end truncated, postico-veiitral niaigin raised. 

 Conrad, Sillinian's .Vmeriean Journal of Science. 

 flab. River .\labama. 



.May, 18G0. 



