Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . rect; lateral teeththick. OBSERVATIONS. On a passing glance this shell would certainly bemistaken for U. nasutus, but the thickness of the shell,the dilated anterior side, and thick, direct, lateralteeth, will sufficiently distinguish it. The disk pos-teriorly has several small plicae or undulations simi-lar to those of U. gray anas, Lea, but as only onespecimen can be examined this character may proveinconstant. In the cabinet of Mr. Phillips. I found it on theshore of Savannah river
Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . rect; lateral teeththick. OBSERVATIONS. On a passing glance this shell would certainly bemistaken for U. nasutus, but the thickness of the shell,the dilated anterior side, and thick, direct, lateralteeth, will sufficiently distinguish it. The disk pos-teriorly has several small plicae or undulations simi-lar to those of U. gray anas, Lea, but as only onespecimen can be examined this character may proveinconstant. In the cabinet of Mr. Phillips. I found it on theshore of Savannah river, at Augusta, and supposedit to be a variety of nasutus, but comparing it withthat species from South Carolina and Florida, it wasfound to differ materially, and to form a link betweenit and the rectus. UNIO LANCEOLATUS. Plate XIV.—Fig. Shell narrow-elliptical, thin, ventricose, yellowish,smooth and polished; disks slightly flattened; ante-rior side somewhat compressed, not very short, mar-gin regularly rounded; umbonial slope regularlyrounded, inflated; posterior side produced, extremity. :
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Keywords: ., bookcentury1800, bookdecade183, booksubjectmollusks, bookyear1836
