Preliminary Report On the Paleontology of the Black Hills
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If a larger number of the New York species were ex- amined, however, it is possible that the resemblance might be much greater than at present supposed.
Formation and locality. In the plant beds of the Potsdam formation (probably Upper Potsdam or Calciferous). Head of Bed Water Valley, Black Hills, Dakota.
MOLLUSCOIDA.
BRACHIOPODA.
LlNGULEPIS CUNEOL. US, n. Sp. Plate 2, figs. 5 and 6.
Shells small, rather below the medium size, triangularly ovate in out" line, or sometimes subcuneate ; ventral ...valve triangularly ovate, with a sharp somewhat pointed beak, the width and length about as three and four, and the point of greatest length near the lower third of the length of the valve; cardinal slopes abrupt, scarcely convex; basal line rounded at the sides but nearly straight in the middle ; surface of the valve strongly convex, becoming almost subangular in the upper part dorsal valve much shorter, proportionally, than the ventral, the length but little exceeding the width ; sides and base more rounded and the beak truncate ; surface distinctly convex.
What to read after Preliminary Report On the Paleontology of the Black Hills?
You can find similar books in the "Read Also" column, or choose other free books by Whitfield, Robert Parr, 1828-1910 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
If a larger number of the New York species were ex- amined, however, it is possible that the resemblance might be much greater than at present supposed.
Formation and locality. In the plant beds of the Potsdam formation (probably Upper Potsdam or Calciferous). Head of Bed Water Valley, Black Hills, Dakota.
MOLLUSCOIDA.
BRACHIOPODA.
LlNGULEPIS CUNEOL. US, n. Sp. Plate 2, figs. 5 and 6.
Shells small, rather below the medium size, triangularly ovate in out" line, or sometimes subcuneate ; ventral ...valve triangularly ovate, with a sharp somewhat pointed beak, the width and length about as three and four, and the point of greatest length near the lower third of the length of the valve; cardinal slopes abrupt, scarcely convex; basal line rounded at the sides but nearly straight in the middle ; surface of the valve strongly convex, becoming almost subangular in the upper part dorsal valve much shorter, proportionally, than the ventral, the length but little exceeding the width ; sides and base more rounded and the beak truncate ; surface distinctly convex.
What to read after Preliminary Report On the Paleontology of the Black Hills?
You can find similar books in the "Read Also" column, or choose other free books by Whitfield, Robert Parr, 1828-1910 to read onlineMoreLess
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