U NIO. 



Plate XXXI V, 



Species 175. (ilus. Ciiniiiiij.) 



Ukio BucKLEYi. Un. testa svhovatd, mbcuviprensa, la- 

 vigaiu, inttis luteo-rubescenle, exttis iiigrcucenle, latere 

 atilicu brevi, subrotiindo, latere poitico producto, per- 

 oblique truncato, biaiignlato, viarifme veiitrtdi medio 

 Inflato, versus anyidum posticimi. leviter excavate, mar- 

 gine terminali inter arigulos truncato. 



IU'ckley's Unio. Shell subovate, subcompressed, smoolb, 

 reddish-yellow within, blackish without, anterior side 

 short, rather round, posterior side produced, very 

 obliijuely truncated, biangulated, ventral margin in- 

 flated iu the middle, and lightly excavated towards 

 tlie posterior angle, terminal margin truncated be- 

 tween the angles. 



Ij'EK, Unio iv. p. 34. pi. xxxix. f. 3. 



llab. Lake George and Lake Munroe, Florida ; S. B. 

 Buckley. 



A very neat, obliciuclv-truncated species. 



Species 1711. (Mus. Cuming.) 



Unto discrepans. Uu. testa oblotigd, vulde eoiupresnd, 

 fii/tire sulcata, postice leevigatd, iiitus alba, fxtiis luteo- 

 viridesreiite, lineatim radiatd, latere aiiiico brevi, sub- 

 rutundo, latere postiro eloiigato, obscure biaiigulatu, 

 inter angulos truncato, margine dorsali rrctiuscido, 

 inurgine laterali declivi, ti/argine ventrali rectu. 



Tme discuep.\nt Unio. Shell oblong, much com- 

 pressed, sulcated in front, smooth at the back, white 

 within, yellowish-green without, rayed with lines, 

 anterior side short, rather round, posterior side elon- 

 gate, obscurely biangulated, truncated between the 

 angles, dorsal margin rather straight, lateral margin 

 sloping, ventral margin straight. 



Lea, Unio viii. p. 22. pi. Iv. f. 165. 



Ilab. North Alabama ; Prof. Tuomey. 

 A very compressed, oblong, small species. 



Species 177. (Mus. Cuming.) 



U.N'IO INVOLIJTA. Un. tedd ovaii, sulaqvilati rail, iiijhin, 

 tenia, leevigatd, intus albu-iridescente, nius tiridi. 



aiitice xiihrohiiido, postice prudueto (iciiiiiiiiiit<i, Innbri- 

 nibiis mtlulis, Inbrrrnlif.-ris. 



The INVulLTlL Unio. SIk-U .vM, sube<|Ullat.ial. in- 

 flated, thin, snioolh, iniksccnt-whilr witlun, gn-m 

 without, rounded in front, produced and acinmnated 

 posteriorly, umboes inflated, tuberculati d. 



Benson, MS. Hanlcy, Bivalve Shells .\pp. p. :i'<4 i. xxni. 

 f. 20. 



Hub. Assam. 



Very light, bright-green, ventricose and acumiiia(ed at 



the end. 



Species WS. (Mus. Cuming.) 

 Unio coaRCTAtus. Un. testa oblongu, trapezuided, coin- 

 pressd, angiistd, solidd, leevigatd, intus pallide ou- 

 rinitid sen purpurea, exlus oliraced-nigrirante, Uitt-rr 

 antico brevi, roliindo, lalvre postien eliinijuln. nldiqiii 

 angidato, post angubnn depres.so insideidn, ii„djundiiii 

 rugalis. 

 The straightened Unio. Shell oblong, trapezoidal, 

 compressed, narrow, solid, smooth, within pale-orangt 

 or purple, without blackish-olive, anterior side short 

 rounded, jiosterior side elongated, obliquely angulate<l 

 with a groove behind the angle, undjocs wrinkled. 

 Lamarck, Anim. sans verl. 

 i U. coinplanalns. Lea. etc. 



Hab. United States. 



The synonymy of this si)eeies has be.'n much ronluM-,1 

 with that of Lea's Siiinphi/nvta romplonala. 



Species 179. (Mus. Cundng.) 

 Unio VMBKANS. Un. Irsid subetliptied, siibventricosd. sub- 

 eequdalerali, irregnlaritrr ingatd, intus purpurea', e.v- 

 tus olivaced-nigrescenti, latere antico breviitsculo, au- 

 gnstu, rotunda, latere postico obscure angidato, ad 

 niargiueni terniinidevi subacnniinato, margine ventrali 

 valde in/latu. 

 The DaRKENINc. Vm". ^M\ sub.lliplieal, subv.niri- 

 cose, subr<|uilaleral, ii ngularly-ridged, purpi,' with- 

 in, blacki^l.-.>lue »illl.iUt, 



side ra 

 seurelv 



