12 2 Bryant Wai^ker 



Subfamily RHODACMEIN^ Walker, 1917. 



Genus RHODACMEA Walker, 1917. 



Subgenus RHODACMEA s. s. 



RhodacmEa FiLOSA (Conrad). 



Ancylus filosus Conrad, New F. W. Shells, 1834, p. 57; Haldeman, Mon., 

 1844, p. 10, pi. I, fig. 9; Binney, L. and F. W. Shells, II, 1865, p. 147, 

 fig. 248; Walker, Naut., XVIII, p. 75, pi. 6, figs. 7-8. 



Acroloxns filosus Tryon, Mon., 1870, p. 232. 



Type locality: Black Warrior River, south of Blount Springs. 



RhodacmEa CAHAwisKNSis Walker. 



Ancylus filosus Walker, Naut., XVIII, 1904, p. yS, pi. VI, figs. 1-6. 

 Rhodacmea cahazvhensis iWalker, Naut., XXXI, 1917, p. 7, pi. I, figs. 4-6. 

 Type locality : Cahawba River, Gurnee, Shelby Co., Ala. 



Rhodacmea elatior (Anthony). 



Ancylus elatior Anthony, Ann. N. Y. Lye. Nat. Hist., VI, 1855, p. 158, pi. 

 V, fig. 20; Binney, L. and F. W. Shells, II, 1865, p. 140, fig. 234; 

 Walker, Naut., XVIII, 1904, p. 78, pi. V, figs. 10-12. 



Type locality: Green River, Ky. 



Rhodacmea hinkleyi 'Walker. 



Ancylus rhodaceus "Walker," Hinkley, Naut., XX, 1906, p. 40, not de- 

 scribed. 

 Ancylus hinkleyi Walker, Naut., XXI, 1908, p. 139, pi. IX, figs. 11-13. 

 Type locality : Ohio River, Golconda, Ills. 



Section RHODOCEPHALA Walker, 191 7. 



Rhodacmea rhodacme Walker. 



Rhodacmea rhodacme Walker, Naut., XXXI, 1917, p. 8, pi. I, figs, i, 2 and 8. 



Type locality : Coosa River, Williamsville, Shelby Co., Ala. 



Rhodacmea gwatkiniana Walker. 



Rhodacmea gwatkiniana Walker, Naut., XXXI, 1917, p. 9, pi. I, figs. 3, 7 



and 9. 

 Type locality : Coosa River, Butting Ram Shoals, Coosa Co., Ala. 



