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Libros Libros 1 - 6 de 6 sobre ... rounded and presenting a strong convex elevation, neck furrow extending all across,...
" ... rounded and presenting a strong convex elevation, neck furrow extending all across, three pairs of glabella furrows represented by small but distinct and obtuse indentations in the sides. Fixed cheeks rather strongly convex. Eyes of moderate size,... "
Second Contribution to the Studies on the Cambrian Faunas of North America - Página 213
por Charles Doolittle Walcott - 1886 - 369 páginas
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Report on the Geology of Vermont: Descriptive, Theoretical ..., Tema 2

Vermont. State Geologist, Edward Hitchcock, Albert David Hager, Charles Henry Hitchcock, Leo Lesquereux, Elkanah Billings - 1861
...line drawn |'j|across the head at about one-third the length of the glabella from of && samebehind would pass through them, and they are distant from...some evidence of a spine on the neck segment. The pygidium found in the same fragment of stone with one of the specimens of the glabella of this species...
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Report on the Economical Geology, Physical Geography and Scenery of Vermont

Albert David Hager - 1862 - 252 páginas
...distinct and obtuse indentations in the sides. Fixed cheeks, rather strongly convex. Eyes of moderate size, semicircular ; a line drawn across the head at about one-third the length of the glabella from of the samebehind would pass through them, and they are distant from the side of the glabella about...
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Palaeozoic Fossils, Volumen1

1865
...strongly convex. Eyes of moderate size, semicircular ; a line drawn across the head at about one third the length of the glabella from behind would pass...about the width of the neck segment. The front of the bead is surrounded by a narrow border which appears to be flat ; there appears to be some evidence...
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Palæozoic Fossils ...

Geological Survey of Canada - 1865
...strongly convex. Eyes of moderate size, semicircular ; a line drawn across the head at about one third the length of the glabella from behind would pass...about the width of the neck segment. The front of the head is surrounded by a narrow border which appears to be flat ; there appears to be some evidence...
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Cambrian Geology and Paleontology ...: Cambrian and Ozarkian trilobites ...

Charles Doolittle Walcott, Charles Elmer Resser - 1916
...distinct and obtuse indentations in the sides. Fixed cheeks rather strongly convex. Eyes of moderate size, semicircular ; a line drawn across the head...about the width of the neck segment. The front of the head is surrounded by a narrow border which appears to be flat; there appears to be some evidence of...
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Smithsonian Miscellaneous Collections, Volumen64

1916 - 75 páginas
...distinct and obtuse indentations in the sides. Fixed cheeks rather strongly convex. Eyes of moderate size, semicircular ; a line drawn across the head...about the width of the neck segment. The front of the head is surrounded by a narrow border which appears to be flat; there appears to be some evidence of...
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