Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . s profound, and the central tubercles areobsolete: in outline it closely resembles U. obliqiiatus,but that species is always of a purple colour within,though the tint is sometimes pale. Inhabits the Wabash river, Indiana, and Detroitriver, Michigan. UXIO TERES. Plate Shell narrow—elliptical, subcylindrical. moderatelythick; umbo slightly prominent; summit obtuselyrounded; umbonial slope abruptly rounded, submar-ginal; posterior side produced, cuneiform: epidermisye
Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . s profound, and the central tubercles areobsolete: in outline it closely resembles U. obliqiiatus,but that species is always of a purple colour within,though the tint is sometimes pale. Inhabits the Wabash river, Indiana, and Detroitriver, Michigan. UXIO TERES. Plate Shell narrow—elliptical, subcylindrical. moderatelythick; umbo slightly prominent; summit obtuselyrounded; umbonial slope abruptly rounded, submar-ginal; posterior side produced, cuneiform: epidermisyellowish and polished, rarely rayed; within white orpale salmon colour; cardinal teeth double in eachvalve, subcompressed. vers* erect; lateral teeth distantfrom the cardinal teeth. SYNONYMES. U. teres, Raf. Ann. gen. des Sc. Phys. vol. v. p. 55. Poulsons trans, p. , Lea. Trans. Amer. Philos. Soc, new series, vol. iv. p. 91, pi. viii. fig. A. V. S. No. 1385. OBSERVATIONS. A well characterized species, approaching the rec-tus in outline, but is comparatively shorter and emi- 2,8. Unto t&reSj R af. 2,9
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Keywords: ., bookcentury1800, bookdecade183, booksubjectmollusks, bookyear1836
