Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . redis from the Scioto river, and was presented by Blanding. 60UNIO ELLIPSIFORMIS. Plate XXXIV.—Fig. 1. DESCRIPTION. Shell elliptical, slightly ventricose, produced pos-teriorly, moderately thick; disks slightly contractedanteriorly; umbonial slope rounded; beaks slightlyprominent, approximate, simple; basal margin dilatedposteriorly to the middle; within bluish; cardinal teeththick, direct. OBSERVATIONS. This species I have seen only in the cabinet of Phillips, who
Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . redis from the Scioto river, and was presented by Blanding. 60UNIO ELLIPSIFORMIS. Plate XXXIV.—Fig. 1. DESCRIPTION. Shell elliptical, slightly ventricose, produced pos-teriorly, moderately thick; disks slightly contractedanteriorly; umbonial slope rounded; beaks slightlyprominent, approximate, simple; basal margin dilatedposteriorly to the middle; within bluish; cardinal teeththick, direct. OBSERVATIONS. This species I have seen only in the cabinet of Phillips, who received it from Michigan. It isvery similar in outline to U. Henosus, but the short,thick, direct teeth, simple beaks, and bluish nacre,form a very distinctive character. UNIO LIENOSUS. Plate XXXIV.—Fig. 2. DESCRIPTION. Shell elliptical, inflated, slightly furrowed or con-tracted from beak to base; substance of the shellthickened towards the base; posterior dorsal andposterior basal margin rounded, extremity subangu-lated; beaks pointed, approximate, slightly prominent, 34 ? ?? ? t^— ~7>.
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Keywords: ., bookcentury1800, bookdecade183, booksubjectmollusks, bookyear1836
