146 



Bryant Wai^kdr 



SoMATOGYRUS suBSTRiATus Walker. 



Somatogyrus substriatns Walker, Naut., XIX, 1906, p. 97, pi. V, fig. 5. 



Type locality: Tennessee River, Florence, Ala. 



Somatogyrus tenni^sseknsis Walker. 



Somatogyrus tennesseensis Walker, Naut., XIX, 1906, p. 114, pi. V, hg. 8. 



Type locality : Shoal Creek, Florence, Ala. 



Somatogyrus trot his Doherty. 



Somatogyrus trothis Doherty, Ouar. J. of Con., I, 1878, p. 341, pi. IV, iig. i. 



Type locality: Ohio River, Campbell Co., Ky. 



Somatogyrus umiulicatus Walker. 



Somatogyrus umbilicatus Walker, Naut., XVII, 1904, p. 137, pi. V, hg. 5. 



Type locality : Coosa River, Wetumpka, Ala. 



Somatogyrus virginicus Walker. 



Somatogyrus znrginicus Walker, Naut., XVII, 1904, p. 141, pi. V, figs. 18-19. 



Type locality : Barnard's Ford, Rapidan River, Va. 



Somatogyrus walkkrtanus Aldrich. 



Somatogyrus 7valkerianus Aldrich, Naut., XVIII, 1905, p. 140, text-fig. 



Type locality: Conecut (Conecuh?) River, Escambia Co., Ala. 



Somatogyrus wiieELERi Walker. 



Somatogyrus ivhceleri Walker, Naut., XXIX, 191 5, p. 51, figs. 1-2. 

 Type locality : Ouachita River, Arkadelphia, Ark. 



Genus GILLIA Stimpson, 1865. 

 GlLLIA WETIIERBYI (Dall). 



Hydrobia ? rvctherbyi Dall, Pr. U. S. Nat. Mus., 1885, p. 258, pi. XVII. 



fig. 10. 

 f Amnicola nuttalUana Frauenfeld, Verb, der k. k. Zool.-bot. Ges. Wien., 



1863, p. 1029. 

 Type locality : Lake Eustis, Fla. 



Genus CEAPPIA Walker, 1909. 



Clappia Walker, Naut., XXII, 1909, p. 89. 

 Type : Clappia clappi Walker. 



CxAPPiA ci,Arpi Walker. 



Clappia clappi Walker, Naut., XXII, 1909, p. 89, pi. VI, figs, i, 4 and 7. 

 Type locality: Coosa River, Duncan's Riffle, Chilton Co., Ala. 



