U N I . 



Plate LXIX. 



Spei-ies 8o2. (Mus. Hauley.) 



Unio VerraUIANUS. Vn. tedCi chiujald, aiihcijlimlrncea, 

 hand pectdiariter iiifeiiiiUatcrali, fnxco-uUraci'd conco- 

 lore, 7'ugk confertin coiiceiitrii-ix (mmjh iiiiiiiisve nutein 

 irregularibm) aii/ice el iniperne orimiii, manjbie dor- 

 mli j)o.slice snirecto, vixque declivl, margine venfrciJi 

 return, lumdd satis magna, margaritu, albidd, detilUnis 

 cardbtalihus transversis, laciniatis. 



Verrau's Unio. Shell elongated, suboylindrical, not 

 particularly inequilateral, of an unit'ovm olivaceous 

 brown, with more or less irregular, close, concentric 

 wrinkles on the umbonal region and in front ; hinder 

 dorsal edge straightish, scarcely sloping ; ventral mar- 

 gin retuse, lunule rather large, nacre wlutish, cardi- 

 nal teeth transverse, jagged. 



Lea. Obs. on Unio, vol. vi. p. 21. pi. 27. f. 16. 



//,//-. Cape of Good Hope, S. Africa. 



\'ery closely allied to Caffer, but with coarser sculp- 

 ture. It is moderately large and strong, has the teeth 

 rather big than otherwise, and its pearl is generally stained 

 with olivaceous yellow on the hinder portion of the um- 

 l)ouul cavity. 



Species 3.53. (Mus. Taylor.) 



Unio Osbeckii. Uh. testd ohlongd, in inedio suln-entri- 

 co-td, jiosiice compressd, fiisco-olivaced concolore, nates 

 vfiisiis acutan porcis rudibus, nntice transver.iis, posiice 

 angularibus, corrugatd ; extremitaie posdcd atteuuutd, 

 aiigidatd, margine ventrali retmo, lumdd perangustd, 

 inconsplcud, margaritd albido-cepridi'scente, dnitibus 

 cardinaUbui traiisversis, di^ntibiis Inti'rurdiiis rah/e 

 elongatis. 



OsHECic's Unio. Shell oblong, subventricose in the 

 middle, compressed behind, of an uniform brownish 

 olive-colour, umbonal region adorned with coarse 

 raised wrinkles, the front ones transverse, the hinder 

 angular ; posterior extremity tapering, angular, ven- 

 tral uiargin retuse, bmule very narrow, obscure, nacre 

 bluish-white, cardinal teeth transverse, lateral teelii 

 Hiucli elongated. 



Pmi.ippi, Ab. >f. Conch, iii. ; Unio, pi. 3. f. 1. 

 Unio Bouglasia ? Gray. 



II, d.. China. 



lines are likewise visible upon the umbonal slope in the 

 vicinity of the ligament. The valves are not very thick, 

 the beaks are acute, rather prominent, anil much noduled. 

 The umboual ridge is rather angular at its commencement, 

 but eventually is obtuse. The nacre is irideseeut ))0ste- 

 riorlv, and the cavity beneath the umboesmueh excavated. 



Iieside< 



principal sculpture, some acutangular raise 



Species 83. (Fig. «, Mus. Kanley.) 



Unio perdix. Vn. tcdu magna, ovali, crassd, nitidd, 

 sidjventricosd, oUvaced, mncuHs jjiillis reinotis postici 

 sparsim radiatd, subleevigald, rugis increini'idi anticP 

 subplicatd ; latere antico liaud breri, subangusto, ad 

 extremitatem rotundato ; exlrenutaie podicd obtuse 

 subbiangulatd, margine ventrali siibarcnato, ninboiiibns 

 latis, hiniild avgustd ; margaritd albd, deidihii^ car- 

 dinalibus magnix, eininentibiix. 



The partridge Unio. Shell large, oval, thick, glossy, 

 subventricose, olivaceous, with a few distant dusky, 

 radiating spots on the posterior half, nearly smooth, 

 but with plicifovm wrinkles of growth in front ; an- 

 terior side not short, somewhat narrow, rouiuled a1 

 its extremity ; posterior end bluntly subbiangulated. 

 ventral margin subareuated, umboes broad, lunule 

 narrow, nacre white, cardinal teeth large, prominent. 



Lea, Trans. Anier. Ph. Soc. vol. v. p. .5. pi. 11. f. 31. 

 Unio pectorosus, Conrad. 



Hab. Elk river, near its junction with the Tennessee. 



This is not the species erroneously so named in Plali- 

 XVIII. 



Species 3.54. (JIus. Hanley.) 



Unio clava. Un. testd ponderosd, subrtwrnljoideo-cnnei- 

 formi, antici truncatd satisqne tnmidd, postici altenii- 

 ald, compressd, fused concolore, Irrvi, natihus valde 

 eminentibiis, hinuld permagnd, margaritd albido-ceern- 

 lescente, dentibus cardinalibus magnis, pyrumidalibus. 



The club Unio. Shell very heavy, of a somewhat rhom- 

 l)oidal wedge-shape, truncated and soiuewluit inflated 

 in front, gradually compressed and tapering behind, 

 of an unilbrm dirty brown, smooth, beaks very pro- 

 minent, lunule very large, nacre bluish-white, cardinal 

 teeth large, pyramidal. 



Lamaiu-k, Anini. sans vert., vol. vi. pt. 1. p. 71. 



