Transactions of the Academy of Science of Saint LouisAcademy of Science of St. Louis, 1856 - Science "Celebration of the fiftieth anniversary of the first meeting," in v. 16 |
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Page 87
... dorsal side rather gradual and symmetrical to the very hinge - line- the posterior wing not being divided from the body of the shell . Ventral margin , in the middle rather straight and nearly par- allel with the dorsal ; posterior ...
... dorsal side rather gradual and symmetrical to the very hinge - line- the posterior wing not being divided from the body of the shell . Ventral margin , in the middle rather straight and nearly par- allel with the dorsal ; posterior ...
Page 98
... dorsal slope there is another sim- ilar but less prominent ridge . The greatest convexity is near the middle of the valve , upon the umbonal ridge . Surface marked by fine , concentric lines of growth . Remarks . This species resembles ...
... dorsal slope there is another sim- ilar but less prominent ridge . The greatest convexity is near the middle of the valve , upon the umbonal ridge . Surface marked by fine , concentric lines of growth . Remarks . This species resembles ...
Page 99
... dorsal slope is marked by two additional subangular ridges radiating from the beak , one just at the dorsal margin and another midway between the dorsal margin and the umbonal ridge . The dorsal margin is sharply inflected to form a ...
... dorsal slope is marked by two additional subangular ridges radiating from the beak , one just at the dorsal margin and another midway between the dorsal margin and the umbonal ridge . The dorsal margin is sharply inflected to form a ...
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Common terms and phrases
Académie des Sciences Academy of Science active membership Agaricocrinus angle aperture APPERTAINING TO HUMAN ball discharge Batocrinus beak brachial valve branches Burlington canaliculus Carboniferous Carlinville caruncle caudex Chonetes Chonopectus sandstone Chouteau Coll concave conjunctiva convex crown curve density developed Devonian diameter Dolatocrinus dorsal Edmondia excretory duct exposure fauna fossils gaseous genus Geological Gesellschaft GLANDS APPERTAINING glandular heat hinge-line HUMAN EYE illustrated Keokuk Kinderhook lacrymal sac length light limestone lines of growth lobules Louis lower eyelid mass Meibomian glands Michigan collection Missouri nearly nebula negative Nipher oblique outer palpebral pedicle pedicle valve plants plate Platycrinus posterior margin Prairie present pressure radiating radius Remarks rhizomes root rounded sebaceous glands shell side slope Société Society solar solar nebula species stars stems striae Surface marked tap-root temperature tion tissue track transverse type specimen umbonal ridge upper eyelid ventral margin Verein vertical volutions