U N 10 



Sjjecies 32. (Mus. Cuming.) 



Unio NODULOSUS. Uii. tesld eloni/ato-ovalti, aiitice Lre- 

 vissimd, postlce compresse alatd, ad umbones et ad 

 aream posilcam rude corrmjatd, in medio pfomi.^ci/e 

 verrticoso-nodulosd ; oUvaceo-nigrd, sericed. 



The knotted Unio. Shell elongately ovate, anteriorlv 

 very short, posteriorly compressly winged, at the 



umboes and on the posterior 



in the niidille promiscuously 



black, silky. 

 Mya nodidosa, Wood, Gen. Conch. 



4; Ind. Test. pi. 2. f. 2 'J. 



Unio Hodithsiis, Lea. 

 JIai. China. 



A beautiful silky- 

 duced wing-like lor 

 of the genus. 



wart- 



dely « 

 jduled 



olive- 

 f. 1 to 



ntca spc 

 (lislincl 



Species 3a. (Mus. Cuming.) 



Unio lachrymosus. Uu. testa quadrato-OEatd, mbtra- 

 pezoided, in medio concavo-impreHsd, Iceviyatd, deiiide 

 acute angidatd, pustice compresse triiiinild, lateribus 

 ambobus copiose mimiie tuberculatis ; hitesceute, cie- 

 ri'.leo-viridi tinctd et varieyatd. 



The lachrymose Unio. Shell squarely ovate, some- 

 what trapezoid, in the middle concavely impressed, 

 smooth, then sharply ^mulnl, ]Ki>tcriorly compressly 

 truncated, both siih- iopi,,ii-l\ minutely tnbercled ; 

 yellowish, stained ami \:in. -^itt d with bluc-grecn. 



Lea, Trans. Amer. Phil. Soc. vol. iii. pi. G. f. 8 ; Obs. 

 vol. i. p. 14. 



Ilah. North America. 



and very neatly 

 dropping like t 



.culpt 



Species 34. (JIus. Cuming.) 



Unio GUANIFERCS. JJu. iesid subroliuidd. /mslich i.indav 

 compresse Imncatd, medio el jju-t/ice /iibcrrii/iilo-jio- 

 didusd, uodidis s/iarus ,• rnr.sir„/r-,jlifami, intii.-: 

 ciipreo-piirjiuruscente. 



The grained Unio. Shell nearly round, posteriorly 

 moderately compressly truncated, in the middle and 

 on the posterior side, tubercularly nodnled, nodules 



Species 3."i. [M\\&. Cuiiiiiig.) 



Unio VERPLICATUS. Vh. ti-.da sidjlriynno-oratd, j/os/ici- 

 expaiisd, superne subahila, uhliiine mile corrmjuto- 

 plicatd, plicis ad htiis poxfirniii radiunlihus : iiitfiixe 

 olivaceo-uiyrd. 



The mucu-plaITED Uxio. Shell somewh.-it triangnhu-ly 

 ovate, posteriorly expanded, slightly winged at the 

 upper part, oblicpiely rudely wrinkle-plaited, plaits 

 on the posterior side radiating ; dark olive-black. 



Conrad, Anthony, MS. in Mus. CnmiLig. 



Ilab. North America. 



rap. 



ightiv 



There ap] 



rred, 



in this species an indication to become 



