SUPPLEMENT TO ISAAC LEA'S PAPER ON TJNIONID^. 61 



straight; anterior cicatrices distinct, large and deeply impressed; posterior cicatrices 

 confluent, large and well impressed ; dorsal cicatrices placed above the cavity of 

 the beaks; cavity of the shell wide and somewhat deep; cavity of the beaks shallow 

 and rounded ; nacre sahnon colored and very iridescent. 



Remarks. — Among the numerous Unionidw received by Mr. Wheatley from 

 North Carolina were five of this species, which I believe has not been before 

 described. It is nearest in outline to U. Savannahensis (nobis), but differs in being 

 not so oblong, in having a remarkably polished epidermis, giving it the appearance 

 of having been varnished. All these fine specimens have a more or less tint of 

 salmon color. Other specimens may be found to be purple or white. None of the 

 beaks were perfect enough to exhibit undulations at the tips. 



ScHizosTOMA Lewisii. PI. 21, fig. 16. 



Testa crebrissime striata, subcylindracea, subtenui, luteo-fusca, imperforata; spira conica, plicata; 

 suturis valde irapressis; anfractibus instar septenis, ultimo grand!; fissura obliqua brevique ; 

 apertura grandi, rhomboidea, intus vittata ; labro crenulato, sinuoso ; columella alba, incrassata 

 et contorta. 



Shell closely striate, subcylindrical, rather thin, yellowish-brown, imperforate ; 

 spire conical, folded ; sutures very much impressed ; whorls about seven, the last 

 one large ; fissure oblique and short ; aperture large, rhomboidal, banded within 

 outer tip crenulate and sinuous ; columella white, thickened and twisted. 

 Proc. Acad. Nat. Sci., 1869, p. 125. 



Hab. — Coosa River, Alabama, Dr. E. E,. Schowalter. 



My cabinet and cabinets of Dr. Schowalter, C. M. Wheatley, Dr. Hartman and 

 Dr. Lewis. 

 Diam. -5, Length '9 inch. 



Remarks. — A fine suite of different ages was sent to me by Dr. Schowalter. 

 There can be no doubt as to its being an undescribed species. At first view it 

 would be mistaken for Goniohasis impressa (nobis), but the well-indented cut at 

 once distinguished it. It differs also, slightly, in having the strise rather coarser 

 and the length being less. The colored bands are very nearly the same. In the 

 young the ground is yellow with five well-defined brown bands inside, and the 

 folds are rather close and not much raised. I have great pleasure in naming it 

 after James Lewis, M.D., who has done so much to make our fresh-water Molluscs 

 known. Aperture about half the length of the shell. 



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