UN 10 



I'l^. 4/. 

 ■II. U. nodifenis, Conrail, i 

 r. ScJioolcraflensk, clescri 



uodiileil vavifty of 

 iit PI. I. Sp. 3. 



Species 48. (Mas. Cuming.) 



Umo INTEKMEDU'S. U)i. testu ■Vibquadrato-ovaiti, de- 

 pressiuscidci, jjostici Jlexitoso-conlractd, concenlrict: 

 pUcato-Hniid, verritcosn, verrncis ad aream pusticum 

 pUcatu-radiantibus ; aurantio-liitfscente, viridi pj-ofme 

 punctata. 



■J'UE INTERMEDIATE Uxio. Shell somewluit squarely 

 ovate, ratlier depresseol, po,l(riiuly ilcxuously con- 

 tracted, concentrically plicalil\ liJ-vd, warted, warts 

 on the posterior area pliiati ly i.idi.iiinL; ; orange- 

 yellow, profusely dotted with green. 



CoNKAD, Anthony, MS. in Mus. Cuming. 



l£ab. North America. 



A prettily painted species, conspicuous 

 tracted on the posterior side. 



flexuously con- 



Sper 



'J. (Mus. Cuming. I 

 Uu. testa oblique 



The 



u Tavoyensis. Un. testa oblique ovald, postice 

 declici-dilatatd et obtuse angulaid, acute midato-cor- 

 rugatd, rugis versus marginem. ventralem evanidis ; 

 sordide oliraced. 



Tavoy Unio. Shell obliquely ovate, posteriorly 

 slopingly dilated and obtusely angled, sharply zigzag 

 wrinkled, wrinkles fading towards the ventral mar- 

 gin ; dull olive. 

 UouLD, Pro. Nat. Hist. Soe. Boston, 1843, vol. i. p. 138. 



Otia, Conch, p. 189. 

 Hab. Tavoy, Burmah ; llev. F. Mason. 



This eastern Unio, it will be seen, 

 type from the American species. 



totally ditferent 



Fig. ol>. 

 The normal form of U. cicati-irosus, of 

 teristic produced variety is given at I'l. \' 



Species 51. (JIus. Cuming.) 

 Unio NODELATUS. Uu. testa su/mrbicu/ari, pox/ici- quu- 



drato-alatd, tuberculato-uodulatu. midiilis ai/iplis, pnii- 



cis, hitescente-olivaced. 

 The noddled Unio. Shell nearly r>rliicular, posteriorly 



squarely winged, tuberculurly noduled, uodulr~ large, 



few ; yellowish-olive. 

 Rafinesque, Mon. Coq. de la riv. Ohio, Ami. Oen. Se. 



Phys. Brux. 1820, vol. v. p. 287. 

 Ilab. North America. 



Quadrately winged on the posterior side with llir 

 nodules few and large. 



Species 52. (JIus. Cuming.) 



Unio states. Un. testa snbtrigond, c 



Jhruosi rolundato-angulatd, delude tru. 



rerrucatd ; virescente-olivacea . 



The stirkup Unio. Sliell somewhat tria 



posteriorly flexuously rotundately angle 



cated, obscurely warted ; greenish-olive 



Lea, Trans. Araer."phil. Soe. 1830, Obs. \ 



pi. 7. f. 8. 

 Ilab. Alabama, North America. 



A shell of solid growth, contracted and U 

 on the posterior side. 



ssn. po.s 

 ',td, oby, 



This remarkably lobed shell i 

 of which the female is given al I'l 



de U.JIe. 



