﻿STROP n ITU s 351 



Stkoi'Iiitus connasaugaensis (Lea). 



Shell thin or scarcely subsolid, elongated, subrhomboid, often 

 narrower in front, subinflated, inequilateral, with full, mod- 

 erately high beaks, whose sculpture consists of a few very 

 strong ridges running parallel with the growth lines and some- 

 what interrupted at the posterior ridge ; posterior ridge full 

 but widely-rounded ; surface with irregular growth lines and 

 more or less developed concentric ridges ; epidermis yellowish- 

 green, with occasional feeble indications of rays, these being 

 mostly developed at the posterior end ; in each valve there is 

 an irregular, subcompressed tooth under or in front of the 

 beak ; laterals wanting ; beak cavities moderate ; muscle scars 

 rather large, slightly impressed ; nacre bluish, shaded with 

 flesh-color in older shells. 



Length 63, height 36, diam. 2}^ mm. 



Alabama River system. 



Connasauga River, Gilmer County, Georgia. 

 Margaritana connasaugaensis Lea, Pr. Ac. N. Sci. Phila., H, 



1857, p. 135; Jl. Ac. N. Sci. Phila., IV, 1859, P- 229, pi. 



xxxn, fig. 113; Obs., VTL 1859, p. 47, pi. xxxii, fig. 113. 

 MiWgaron (Margaritana) comiasaugaensis Lea, Syn., 1870, 



p. 69. 

 Unio connasaugheHsis Sowerby, Conch. Icon., X\'I, 1868, pi. 



Exxxviii, fig. 474. 

 Margaritana connesaugensis Ceessin, Conch. Cab. Ano., 1875, 



p. 269, pi. Lxxxi, figs. 7, 8. 

 Strophitns connasaHgaeiisis Simpson, Syn., 1900, p. 618. 



In the Synopsis I placed the Margaritana alahamensis of Lea 

 in the synonymy of the above. What little material I have 

 been able to examine of this group is puzzling, variable and 

 unsatisfactory. Lea has placed in his Margaritana holstonia 

 specimens, which I think are his M. alahamensis. 



Stropiiiti^s ai.abamensis (Lea). 



Shell subrhomboid, somewhat elong-ated, scarcely inflated, 

 inequilateral, thin to subsolid; beaks moderately full and ele- 

 vated, their sculpture consisting of a few strong ridges run- 



