﻿ANODONTOIDES " 4^9 



Anodonta siibcylindrocca Clessin, Conch. Cab. Ano., 1873, p. 



92, pi. XXVI. fig-s. 6, 7. 



Many specimens resemble certain forms of StrophiUis eden- 

 tiihis so closely as to even deceive experts. Generally the shell 

 is thinner than in that species, though I have before me an 

 A. fenissacicnus bclonc-ing to the Lea collection from Cincin- 

 nati. Ohio, which is as solid as any Strophitns I have ever seen. 

 Usually the hinge of A. fenissacianiis does not show quite as 

 much of a development of teeth as does the S. cdcntulus, the 

 shell is more nearly elliptical, is more evenly rounded behind, 

 is straighter on the basal line and smoother than cdcntulus. 

 Finally the beak sculpture is not so strong and wide as it is in 

 the latter species. The character of the marsnpia is very dif- 

 ferent in the two genera. 



\'ar. buchancus.is (Lea). 



Shell smaller, more elongated and delicate than the type, 

 more disposed to be biang-ulate and widened behind. 

 Length /6, height 36, diam. 27 mm. 

 St. Lawrence System. 

 Type locality, r)uck Creek, O. 

 Anodonta buchoncnsis Lea, Tr. Am. Phil. Soc, Vl, 1838, p. 

 47, pi. XIV. fig. 43 ; Obs., IL 1838, p. 47- pl- ^^v, fig. 43-— 

 SowERP.v, Conch. Icon., XVE, 1869, pi. xxiv, fig. 92. 

 Margarita (Anodonta) huchanensis Lea, Syn., 1836, p. 54; 



T838, p. 32. 

 Margaron (Auodouta) huchanensis Lea, Syn., 1852, p. 51; 



1870, p. 82. 



Anodonta subcxlindracca Lea, Tr. Am. Phil. Soc. VL 1838, p. 



T06, pi. xxiv. fig. 117; Obs., IL 1838, p. 106, pi. XXIV, fig. 



„7._Wai,ton, Moll. Monroe Co., 1892, p. 17, pi. viii. fig. 3. 



Margarita (Anodonta) subcylindracca Lea, Syn., 1838, p. 32. 



Anodon subcylindracca De Kay, Zool. of N. Y., Pt. 5, 1843, 



p. 200, pi. xvT, fig. 229. 

 Margaron (Anodonta) subcylindracca Lea, Syn., 1852, p. 51 ; 

 1870, p. 82. 



