30 CATALOGUE FAMILY UNION ID J 



* Unio forsheyi, Lea. 



(Jour. Phila. Acad. Nat. Sci., 2d Series, Veil. V PI, LX, Fig. 182.) 

 Indian Territory to Texas ; east to Big Prairie creek, Alabama. See under 17. 

 lachrymosus, Lea, with which the species groups. 



* Unio fragosns, Conrad. 



(Mongraph of Unio, PI. VI, Fig. 2.) 



Ranges from the Ohio river to Fall river, Elk county, Kansas. The species 

 is often received as U. asperrimuf, Lea, to which it bears a close resemblance. 

 It groups with U. lachrymosus, Lea. 



f Unio fucatns, Lea. 



(Jour. Acad. Nat. Sci. Phila., PL LIX, Fig. 178.) 



"North Alabama," the original locality; Elk river, a tributary to the Tennes- 

 see, but whether in the Alabama portion of its course is not known. Belongs 

 to the group of which U. iris is the type. 



t Unio fnlgidns, Lea. 



(Trans. Am. Phil. Soc., 2nd Series, Vol. X, PL IV, Fig. 10.) 



This species, a member of the tumescens group, was described from the Red 

 river, at Alexandria, Louisiana, the only locality yet known. 



t Unio gibber, Lea. 



(Trans. Am. Phil. Soc., Vol. VI, PL X, Fig. 30.) 



Caney Fork, Tennessee, a tributary to the Cumberland. Is this more than a 

 variety of U. crassidens, Lamarck ? 



* Unio gibbosns, Barnes. 



(Am. Jour, of Sci. and Arts, 1st Series, Vol. VI, PL XI, Fig. 12.) 

 Ottawa river, Canada; central New York, Mohawk river; south to Bluestone 

 river, Virginia, and Tuscumbia, Alabama; Kansas; north to Minnesota. See 

 under U. arctior, Lea. The species is frequently received bearing the name of 

 U. rectus, Lamarck, from which it is readily to be distinguished by the coarse 

 character of the undulations on the umbones. 



CATALOGUE 2:2. 



