Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . \ v w lUnio clava, Lam, £.Unio cteetsus, 1 Wnifi reft* xm :. Ullifi /•? ?? ? UNIO REFLEXUS. Plate IV.—Fig. Shell suboval, thick anteriorly; middle of the diskswith a single row of distant elevated tubercles, aboutfour in number; umbo not very prominent, subme-dial; umbonial slope subcarinated; posterior sideslightly furrowed and emarginate at base; posteriorslope flattened, with transverse undulations; poste-rior extremity truncated; within white; cardinal teethla
Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . \ v w lUnio clava, Lam, £.Unio cteetsus, 1 Wnifi reft* xm :. Ullifi /•? ?? ? UNIO REFLEXUS. Plate IV.—Fig. Shell suboval, thick anteriorly; middle of the diskswith a single row of distant elevated tubercles, aboutfour in number; umbo not very prominent, subme-dial; umbonial slope subcarinated; posterior sideslightly furrowed and emarginate at base; posteriorslope flattened, with transverse undulations; poste-rior extremity truncated; within white; cardinal teethlarge, direct, much sulcated. Var. A. disks covered with small tubercles. Var. B. epidermis blackish, nacre purple. SYNONYMES. U. reflexus, Raf. Ann. gen. des Sc. Phys. vol. v. p. 40. Poulsons trans, p. 40. Say, Amer. Conch. No. 6. Ferussac, Mag. de cornutus, Barnes. Sillimans Journ. vol. vi. p. A. N. S. No. 1750. OBSERVATIONS. Allied to the U. flexaosas, but approaches nearestto U. gibbosus, Raf., yet may always be distinguish-ed from that species by its suboval outline, and theregularity and prominence of its tubercles. Th
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Keywords: ., bookcentury1800, bookdecade183, booksubjectmollusks, bookyear1836
