THE NAUTILUS. 



21 



Mahoning River, Cuyahoga River, Tuscarawas River. 



Anodonta. 



decora Lea, plana Lea ? 



subcylindracea Lea, subcylindracea Lea, subcylindracea Lea. 



edentula Lea, edentula Lea, edentula Lea. 



imbicilis Say (very ? ? 



rare), 

 I^avonia Lea, Vai'. pavonia Lea (typical) pavonia Var. 



Above the falls. 



complanata Lea, 



Hildrethiana Lea, 



(rare) 

 margiuata Say, 

 ruffosa Barues. 



Margaratana. 



complanata Lea, 

 (canal) 



marginata Say, 

 rugosa Barnes. 



deltoidea Lea. 

 complanata Lea. 

 dehiscens Lea (rare). 

 Hildrethiana Lea 



(rare). 

 marginata Say ? 

 ru£rosa Barnes. 



Unio. 

 alatus Lea, 

 circulus? Lea, 



circulus Lea, 



clavusLam (common), 



coccineiis Lea, coccineus Lea, 



cylindricus Say, 



fabalis Lea, 



gibbosus Barnes, 

 iris (rare), 



gibbosus Barnes, 



luteolus Lam., 



Novjeeboraci Lea, 

 luteolus Lam., 



alatus? Lea. 

 circulus Lea. 

 clavus Lam (rare), 

 coccineus Lea. 

 cylindricus Say. 



gibbosus Barnes. 



? ? 



irroratus Lea. 

 Novaeeboraci Lea. 

 luteolus Lam (rare). 



multiradiatus Lea, multiradiatus Lea, 



nasutus Say, 



occidens Lea, occidensLea (rare), 



(subovatus) 



parvus (reservoirs) parvus (reservoirs) 



Barnes, 



phaseolus Hild., 



occidens (common) 



? ? 

 perplexus Lea (rare). 



