Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . e; a slight groove on the pos-terior submargin; raised radiating lines extend fromthe angle of the larger furrow to the posterior extre-mity, which is direct and slightly retuse; basal marginretuse posteriorly; epidermis glabrous, with faint fili-form brown rays; within purple or rose colour; car-dinal teeth very large and prominent, double in eachvalve. SYNONYME. U. sowerbianus, Lea. Trans. Amer. Phil. Soc., new series, p. 68, pi. x. fig. 28. OBSERVATIONS. The fine specimen of
Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . e; a slight groove on the pos-terior submargin; raised radiating lines extend fromthe angle of the larger furrow to the posterior extre-mity, which is direct and slightly retuse; basal marginretuse posteriorly; epidermis glabrous, with faint fili-form brown rays; within purple or rose colour; car-dinal teeth very large and prominent, double in eachvalve. SYNONYME. U. sowerbianus, Lea. Trans. Amer. Phil. Soc., new series, p. 68, pi. x. fig. 28. OBSERVATIONS. The fine specimen of this beautiful and very distinctspecies which I have figured, was kindly loaned forthe purpose by Mr. Featherstonhaugh, who procuredit from Cumberland river, Tennessee. I found onein the summer of 1833 on the bank of Elk river,Alabama, and judging from Mr. Leas figure of thepilcus, I supposed it to be that species.* The speci-men is in the cabinet of Mr. Poulson. The Sowerbianus is remarkable for its highly po-lished epidermis and raised lines on the posterior side. * New Fresh Water Shells, p. 69, ?% v^ /
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Keywords: ., bookcentury1800, bookdecade183, booksubjectmollusks, bookyear1836
