DES MO INKS ACADEMY OF SCIENCE. 55 



I I'nio validns. Lea. 



>b--t>rvatii>i]s on the (ienus fiiio. Vol. XIII, PI. 1. Fig. :.'.) 



Huck river, Tennessee. Nothing more is recorded of this species, which ap- 

 pears to be close to 7'. />i;//>iy<j.si.v, Lea. 



I Unio vaiiiixeinii, Lea. 



(Trans. Am. Phil. Soc., Vol. VI, PI. XI, Fig-. 31, as U. vanuxemensis.) 

 Cumberland river. Tennessee. 



t Unio varicosus, Lea. 



(Trans. Am. Phil. Soc., Vol. IV, Pi. XI, Fig-. 20.) 

 Ohio river, Cincinnati, Ohio. Local, and rather rare. 



* Unio ventricosiis, Barnes. 



(Am. .lour. ..I 1 Sci. and Arts, 1st Series, Vol. VI, PI. XIII, Fig. 14.) 

 Senvca river. New York, to Kansas river, at Topeka; north to Wisconsin and 

 Michigan. The species has been doubtfully credited to Lake Champlain. See 

 under U. occldens, Lea. 



$ Unio veiiii&tus, Lea, 



< I'rans. Am. Phil. Soc., Vol. VI, PI. II., Fig. 4.) 



" Potosi, Missouri.'' in a tributary to the Mississippi. Very closely resem- 

 bles the young of U. Uynmentluus, Lamarck. 



"" Unio vernieosiis, Barnes. 



(Am. Jour, of Sci. and Arts, 1st Series, Vol. VI, PI. V, Figs. tin. fib. 



Ne\\ river, Virginia, to Tusciunbia, Alabama; to Iowa; to Michigan. Fre- 

 quently confounded by collectors with U. cratiifernx, but from which it is en- 

 tirely distinct, though grouping with it. 



f Unio vircsrens, Lea. 



(Jou \ Acini. Nat. Sri. Pbila. Vol. IV, PI. LV, Fig. Ifiti.i 

 sprinir creek and Tennessee river, north Alabama. A member of the group 



Unio wiirdii, Lea. 



(Jour. Ac.i<l. Xat. Sei. Phila., 2d Series, Vol. V, PJ. XXI V. Kig. :^'>.) 

 Kane's from \\Y-t Virginia to central Iowa. The s]iecies is dose to V. met,- 

 iK'rni*. into \vlii<-li it ai)])ears to graduate. It groups with U. cy/iinlrii'ii*. 

 Say. 



CATALOGfE 47. 



