Ortmann : Unionid.t: of Western Pennsylvania. 181 



the more probable that Ham's shells were distinctly from this drain- 

 age system. 



W. B. Marshall published (Bulletin New York Museum, i, 1892, 

 pp. 3 et seq.) a list of Unionidse from New York. The species were 

 "from localities within the limits of the state of New York, or from 

 the Allegheny River at Warren, Pa., just south of the New York 

 boundary." It is much to be regretted that Marshall did not realize 

 the importance of indicating the exact localities, since his list covers 

 a territory which is of the greatest interest. We do not know which 

 species of this list were found in Warren County, Pennsylvania. 



I have myself collected the following species in Warren County 

 (Allegheny River, Connewango, and Brokenstraw Creeks) : 



Marshall's list. 

 Truncilla perplexa 7-angiana (Lea) = Unio perplexus Lea. 

 Micromya fabalis (Lea) = U.fabalis Lea. 



Lavipsilis ventricosa (Barnes) = U. occidens Lea and U. ven- 



tricosus Barnes. 

 " ventricosa ovata (Say) = U. ovatus Say. 

 " multiradiata (Lea) = U. multiradiatus Lea. 



" luteola (Lamarck) = U. luteolus Lamarck. 



" ligamentina (Lamarck) = U. ligamentinus Lamarck. 

 " recta (Lamarck) = U. rectus Lamarck. 



Ftychobranchusphaseolus{W\\Axt\\C)= U. phaseolus Hildreth. 

 Strophitus undulatus (Say) = Anodonta edentula Say and 



pavonia Lea. 

 Anodonta grandis Say = Anodonta lewisi Lea. 



Symphynota compressa Lea = U. pressus Lea. 



" costata (Rafinesque) = Margaritana rugosa Barnes. 



Alasmidonta viarginata Say = M. marginata Say. 



Quadrula coccinea (Conrad) ("without evidence that it in- 



habits New York "). 

 We see that all, except the last species, are in Marshall's list. But 

 in addition, the following western species are recorded from New York 

 state : 

 Unio alatus Say = Propter a alata (Say). 



♦' clavus Lamarck = Pleurobema clava (Lamarck). 

 Margaritana complanata Barnes = Sytnphynota complanata (Barnes). 

 Unio crassidens Lamarck. 



