lO 



Cincinnati Society of Natural Ilistoy. 



CATAIXXIUK OF THE UNIONIIXK OF THE MISSISSH'PI 



VALLEY, 

 I!v (;k(). \V. Hari'KR, a. M. 



Piiiicii):il of CinciiiiKiti Woodward High School. 



The following catalogue is intended to include cnily tliose si)c- 

 cies of bivalve shells which are found in the Mississippi river or 

 some of its numerous tributaries. As this region embraces a wide 

 scope of country it is possible that some of the species which ought 

 to appear may have been overlooked. The effort has been made 

 to eliminate all synonyms, which fact Avill explain the omission of 

 some names familiar to collectors. Many of these shells have a 

 wider range than indicated in this catalogue. 



For range and synonomy see catalogue of R. Ellsworth Call, 

 published by the Des Moines Academy of Sciences. Vlany of the 

 shells marked from Tennessee were collected by Prof. A. G. ^^'etn- 

 erby and myself, part in East Tennessee in the Powell and Clinch 

 rivers and others in Duck and Elk rivers of Middle Tennessee. As 

 these rivers are tributaries of the Tennessee, modified forms of all 

 these species are undoubtedly found throughout the course of the 

 Tennessee river. 



Most of those marked from Ohio have been collected from the 

 Ohio river, the two Miami rivers, Mill Creek and the Miami Canal, 

 and within a radius of not more than twenty miles from the city. 

 Shells not numbeied are desired in exchange for those numbered. 



FAMH.Y UNIONID.L. 



(FlivER Mussels.) 



Genus Unio. 

 Unio abacus. Ha Id... Ten n. 

 " aberti, Conrad, . Ark. 

 " acuens. Lea, ..Tenn. 

 " ajsopus. Green, . .()... 15 



" afifinis, Lea, La. 16 



" alatus. Say, O. 17 



" amcenus, Lea. .Tenn. 18 

 " andcrsohensis, Lea, " 

 " anodontoides. Lea, O. 

 " ai)])ressus, Lea,Tenn., 

 Ala 



Unio apiculatus, Say, . .T,a. 



" approximus. Lea, " 



" arkansensis, " Ark. 



" arquatus, Conrad, Lid. 



" arctatus, " Ala. 



" argenteus. Lea, Tenn. 



" arca;formis, " " 



" atrocostatus, " Ala. 



Unio barnesianus. Lea, Tenn 

 " bellulus, " " 



