DES MOINES ACADEMY OF SCIENCE. ;jf> 



t I'nio losoiH'rianiis, Lea. 



(Tnins. Am Phil. Soc.. 2nd Ser., Vol. VIII, PI. VIII. Pig. ;.,' 



The type of this species came from the Holston river, east Tennessee. It 

 ranges from Ashcville, North Carolina, to near Tuscumbia, Alabama. See 

 under U. chant*. Lea. 



* Unio ligaiiieiitimis, Lamarck. 



(American Conehology, P,. Vil I, as U. crassus. Say. Am. Jour, of Sci and Arts, N 

 Series, Vol. VI, PI. XI, Fig. 20 As U. carinatu^ Barnes.) 



This species has a wide distribution and is the type of a rather large 

 group. The extremes of distribution, noted thus far, are western New York 

 to North Alabama; to south-western Kansas ; north to St. Paul, Minnesota. In 

 almost every considerable stream throughout this vast range ft is a very common 

 shell. A very peculiar dwarfed form occurs abundantly in the Holston river, 

 Tennessee, and in the Tennessee river, Muscle Shoals, Alabama. It is also ex- 

 tra-Iimital, being found at Racine, Wisconsin, in streams flowing into Lake Mich- 

 igan, and hence in the Atlantic drainage. Among the forms belonging to tiie 

 group of which this species is the type are U. pictus, 77. menkianus, U. linds- 

 leyi, U. clarkianus, U. biting ulatus, U. punvtatus, U. pulcher, U. interrup- 

 tus, 77. upsoni, and 77. psrdix, some of which do not appear to be far enough 

 removed from one another to take specific rank. 



* Unio limlsleyi, Say. 



(Jour. Acad. Xat. Sci. Phi'.a.. 2nd Series, Vol. IV, PI. LV1II, Fig. 176.) 

 "Tennessee," See under 77. ligament-inus, Lamarck. 



\ Unio Hngneformis, Lea. 



(Jour. Acad. Nat. Sci. Ph'hi.. 2nd Series, Vol. L V, PL LVI, Fig-. 170.) 



French Broad river, Tennessee, and Chattahoochee river, Georgia. It is very 

 close to 77. tener, Lea, forming a member of the same group. 



Unio lunnlatiis, Pratt. 



(Prop. Davenp rt Ac id. Nat. Sci., Vol. I, PI. XXXI, Fig. 1.) 



This form was described from the Mississippi river, at Davenpert, Iowa. It 

 groups with 77. lachrymo&us, and is, perhaps, synonymous. 



* Unio luteolus, Lamarck. 



(Nat. Hist, of NLW York, Vol. V, Part I, Moll t. sea. Pi. XX, Fijr. 241. Also. 

 in Am. .Jour, of Sc:. and Arts, 1st Series. Vo'. VI, PI. XIII. Fir. 15. As t*. .sfhV/t/oi- 

 deus, Harnes. 



CATALOGUE 27. 



