UNIO.— Plate LXXXIU. 



Specips 440. (Mn>. I,™.) 



UnIO COXCOLOR. I'll. Irshi' sii!i-l I iiilirii . iiiirqiiihiti'riili , 

 cnisiiii^riild, siihmilnvuxd. n/iriiccii-iiii/rexcrH/f coiico- 

 tore, Ifenigaln ; rosld iiiiiljonnU vi.j: jjiviiiiiiu/ci, ohtii- 

 ■ussime migulatd ; muri/ariiu ullid ; daidibus cardiim- 

 libiis crusniuscidis, crniis, uhtnxi ruiiipreish ; dcillibiis 

 hlleralUlM Xldjlinnjlx. nhlhi'iis, M'/,/; r/i\. 



The one-tinted L'mh. sIk 11 -oimu li,it I'liipiic, iii- 

 ('([uilatfral, tliirki-li, M>iiiL'«li;a vcnlricobi.-, of a uiii- 

 f'onii ilu-kv olivc colour, snionlli; mubonal rk\'j:e 



til .-^oii 



scarcely pr 



white ; prii 



pressed ; hi 



straiu'iit. 

 Lea, Proc. Ae. X. S. Phihul 



IJriio, vol viii. p. 1)3. j.l, 

 JM. Big Prairie Creek, AhilK, 

 Lea remarks that tiiis shell. 

 ovatiis of Courm]. has the oull 

 Bnn„l,,/aiii,s. aii.l rciiiili.ls uiu- 

 and has the beaks less raised, 



ect, obtusely eoiii- 

 iig, obli(|iie, nearly 



1 for the ppr- 

 the colour, u\ 



il.-o ol 

 ul uior 



Species 44L (Mus. Lea.) 

 Unio IIeermanm. J'ii. feild siMenui, de/iressa, iiiaqiii- 

 taferali, iirin'i--,i'l,'jiii'ilratd, puntki siibhiangidatn, ni- 

 tidd,fiiscu-/iiicsccicU' concolore, Icevi ; casta nmbonaU 

 prominuUi, roluridald, wfenie lain ; inarghie Viija- 

 mentali acclivi, Inmild ant nnlld ant aitgustkshiiii ; 

 maryarild nilidmimd, pnrpnraiin'nlc, snpenti', antcni, 

 palcide aitrontio-ritbrd ; dinlibim ca/'i/iiwlibns snb- 

 coidcis, creunlulis. 

 Heeumak's I'nio. Shell thinnish, depressed, ineiiuila- 



teral. siiuarish oval, somewhat biaiigidated behind, 

 of a uniform glossy yellowish-brown, smooth ; um- 

 bonal ridge rounded, little projecting, broad at its 

 termination ; ligauieutal edge rising, lunule cither 

 none or very iiarrou', nncre of a very brilliaiit pur- 

 plish hue, yet s.ihuou-coloured in the \unljonal ca- 

 vity; primary tcetli somewhat conical, crcnulated. 



Lea, Proc. Ac. k. S. Pliilad. 18(il, p. 39;i ; Obs. on 

 luio, vol. ix. p. 16. pi. SG. f. 2(53. 



TLab. Medina river, Texas. 



442. (Mus. Forshey.) 



() RlDUELIJ 



/iiiid,ilu-si>/u 



Vil. hst.i 



par 



ilidd, injiatd, ro- 



Inilii. rr.ldf iiurqiiitnhrali, f'lsco-oli- 

 i-aili(il((. Iiiri ; niiirij'nii' venlrali area- 

 alii, ciisid iiiiiliiiiKili iiiiiiiiliitii (-/ coiisjiiciid, hiHiild 

 iinllii, niiibuilihiia raldr ciiiiiinilibn.'i ; tiiitibns iiihutli 

 i-l roiifvrtiin plicati.% inanjnritd nlbd, drnlibn-s ciird'i- 

 naVibuH sidipi/nnnldulibiis, deiilibns lateralibns hilis. 

 rurnujalh. 



Riddell's Unio. Shell small, solid, inflated, squarish- 

 rounded, very inequilateral, olive-brown, indistinctly 

 rayed, smooth ; ventral edge arched, umbonal ridge 

 conspicuous and aiii;ular, no lunule, luuboes very 

 prominent, beak^ uilh minute and crowded folds, 

 nacre white, primary teeth subpyramidal, lateral 

 teeth broad and wrinkled. 



Lea, Proc. Ac. N. S. Philad. ISfil, p. 392; Obs. on 

 Unio, vol. ix. p. ;;o. pi. 27. f. 207. 



Ilab. Dallas in TeNa<. 



Deseril.e, 



single, but p. rfect i 



