DKS MOIXKS ACADEMY OF SCIKNVK. 4<) 



lUnio sparsus, Lea. 



(Tram. Am. I'hil. S<.<-., :.M Series, Vol. VIII. PI. XXV. Fig. :,s., 

 Ilolston river. 



I Unio spams, Lea. 



(Jour. Ara.l. Nat. Sri. Fhihi.,:.'ml Series, Vol. VI, PI. XLV11, Fig. 11!).) 

 Kentucky, east Tennessee, and northwest Georgia, in Whitfield county, 

 Swamp creek tlic last named being the locality of the original specimens. 



;: I'nio spatiilatus, Lea. 



(Trans. Am. Phil. Soc., 2nd Series, Vol. X, PL VIII, Fig. 23.) 



Western New York to central Iowa; to Wisconsin, Minnesota and Michigan. 

 This species usually occurs abundantly. 



* Unio sphaericus, Lea. 



(Jour. Acad. Nat. Sci. Phila., 2nd Series, Vol. VI, PI. LI, Fijr. 1:52.) 

 Alabama and Cahawba rivers, Alabama, to Indian Territory and south to 

 Trinity river, Texas. See under U. pustulosus, Lea. 



t Unio stewardsonii, Lea. 



(Trans. Am. Phil. Soc., 2nd Series, Vol. X, PI. XXIII, Fig. 38.) 

 'Chattanooga," Cumberland, and Hoi ston rivers, Tennesssee, and Tennessee 

 river, north Alabama. This is a member of the group of perplcxus, which see. 



f Unio stonensis, Lea. 



(Trans. Am. Phil. Soc., 2nd Scrios, Vol. VIII, PI. VIII, Fig. 5.) 

 " Stone's river, Tennessee; " a tributary to the Cumberland. 



+ Unio suberoceus, Conrad. 



(Figured ?) 

 "Canadian river. Arkansas." No further information has been accessible. 



t Unio snbg-lobatus. Lea. 



(Observations on the <J<MMIS [Jtilo, Vol. XIII, PI. I, Fir. y.i 



Centra] and east TeniK-see, and north Alabama. This is a member of the 

 i-ltcimx s:nnj. and synonymous with U. glubatiix, which see. 



CATALOGUK 41. 



