Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . en rays varying much in size; anteriorside not very short, margin regularly rounded; liga-ment margin straight, not declining; posterior ex-tremity angulated; umbonial slope undefined; beakswith flexuous undulations; within bluish-white; cardi-nal teeth oblique, lateral teeth slightly decurved pos-teriorly. SYNONYMES. U. siLiquoiDEus, Barnes. Sillimans Journ. vol. vi. p. inflatus, lb. p. A. N. S. No. 1055. OBSERVATIONS. The species which most resembles this appears tob
Monography of the family Unionidæ : or, Naiades of Lamarck (fresh water bivalve shells) of North America ... . en rays varying much in size; anteriorside not very short, margin regularly rounded; liga-ment margin straight, not declining; posterior ex-tremity angulated; umbonial slope undefined; beakswith flexuous undulations; within bluish-white; cardi-nal teeth oblique, lateral teeth slightly decurved pos-teriorly. SYNONYMES. U. siLiquoiDEus, Barnes. Sillimans Journ. vol. vi. p. inflatus, lb. p. A. N. S. No. 1055. OBSERVATIONS. The species which most resembles this appears tobe the radiatus, which for comparison we figure uponthe same plate. Young specimens differ constantlyfrom the radiatus in having a straw-coloured highlypolished epidermis, and much undulated beaks; aremore inflated, have the anterior side longer and themargin more regularly rounded. The sexual varie-ties are far more strongly marked, some specimenshaving almost the form of U. cariosus, whilst the ra-diatus offers comparatively slight differences of out-line. Old shells become thick and much inflated, and m.
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Keywords: ., bookcentury1800, bookdecade183, booksubjectmollusks, bookyear1836
