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Books Books 1 - 3 of 3 on Shell medium size, equivalve or nearly so, valves suborbicular, height of the valves....
" Shell medium size, equivalve or nearly so, valves suborbicular, height of the valves being greater than their lengths from the anterior to the posterior side, very gibbous ; anterior and posterior sides rounded, and forming with the base about three-fourths... "
The University Geological Survey of Kansas - Page 450
1898 - 594 pages
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Proceedings of the Academy of Natural Sciences of Philadelphia, Volume 14

Natural history - 1863
...of a circle : cardinal border somewhat arched ; beak large, elevated, gibbous, distinctly involuted and directed obliquely forward, so as to bring its...surface of cast smooth, or marked by obscure concentric folds. (Right valve unknown.) Length from anterior to posterior margin, 5 inches; height, 5'50 inches...
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The Colorado Formation and Its Invertebrate Fauna, Volume 8, Issue 106

Timothy William Stanton - Geology, Stratigraphic - 1893 - 288 pages
...being broader than the other; cardinal margin comparatively short, and apparently a little arched; beak large, elevated, gibbous, distinctly incurved and...smooth, or marked by obscure concentric undulations. (Right valve unknown.) "Length from anterior to posterior margin, 5 inches; height, 5.50 inches ; convexity,...
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Reports, Volume 4

Kansas Geological Survey - Geology - 1898
...Bull. US Geol. Surv., p. 83, pi. xvn, ff. l and 2. Revised description : " Shell medium size, equivalve or nearly so, valves suborbicular, height of the valves...beak precludes the possibility of its belonging to /. umbonatus, as suggested by Stanton. ( See citation above.) Itioceramus tenu i rostrata s M. it H....
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