Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . al near Louisville, whence Mr. Hyde has receivedit. UNIO BLANDINGIANUS. Plate XXIII.—Fig. 2. DESCRIPTION. Shell subtrapezoidal, rather thin, ventricose; ante-rior margin very obtusely rounded; ligament marginmuch elevated, slightly arcuate, angulated at tip, pos-terior margin long, oblique and rectilinear; extremitysubtruncated or obtusely rounded; beaks slightly ele-vated, eroded; umbonial slope rounded, very distantfrom the margin; epidermis finely wrinkled; withinpurplish, with gre
Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . al near Louisville, whence Mr. Hyde has receivedit. UNIO BLANDINGIANUS. Plate XXIII.—Fig. 2. DESCRIPTION. Shell subtrapezoidal, rather thin, ventricose; ante-rior margin very obtusely rounded; ligament marginmuch elevated, slightly arcuate, angulated at tip, pos-terior margin long, oblique and rectilinear; extremitysubtruncated or obtusely rounded; beaks slightly ele-vated, eroded; umbonial slope rounded, very distantfrom the margin; epidermis finely wrinkled; withinpurplish, with green stains; cardinal teeth small, singlein the right valve and compressed; widely bifid, andrather obtuse in the left; lateral teeth distant fromthe cardinal teeth, and arcuate; anterior muscularimpressions marginal. SYNONYME. U. blandingianus, Lea. Trans. Amer. Philos. Soc. new series, vol. v. p. 101, pi. xv. fig. A. N. S. No. 1859. OBSERVATIONS. A species allied to complanatus and declivis, butdiffering from both in the elevated ligament marginand inflated disks. The anterior lunule resembles U.
Size: 1974px × 1266px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade183, booksubjectmollusks, bookyear1836
