Reports, Volume 5 |
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Page 38
... convex , wider in front than back of the middle , margins regularly rounding , rather sharply on the posterior border ; umbo rather prominent ; beak small . Horizon and localities . - Upper Carboniferous , Coal Meas- Clinton ( Henry ...
... convex , wider in front than back of the middle , margins regularly rounding , rather sharply on the posterior border ; umbo rather prominent ; beak small . Horizon and localities . - Upper Carboniferous , Coal Meas- Clinton ( Henry ...
Page 50
... convex , strongly incurved , with a broad , rounded , mesial sinus ; beak prominent , closely incurved ; ears well defined . Dorsal valve . flattened more or less , carved toward the anterior margin . Surface of both valves marked by ...
... convex , strongly incurved , with a broad , rounded , mesial sinus ; beak prominent , closely incurved ; ears well defined . Dorsal valve . flattened more or less , carved toward the anterior margin . Surface of both valves marked by ...
Page 54
... convex , much smaller , with mesial sinus of the ventral valve very marked . Horizon and localities . - Upper Carboniferous , Upper Coal Measures : Kansas City . Chonetes lævis KEYES . Plate xxxvii , figs . 5a 54 BRACHIOPODS .
... convex , much smaller , with mesial sinus of the ventral valve very marked . Horizon and localities . - Upper Carboniferous , Upper Coal Measures : Kansas City . Chonetes lævis KEYES . Plate xxxvii , figs . 5a 54 BRACHIOPODS .
Page 55
... convex , with a broad , very shallow median depression , which is often wanting en- tirely ; beak not prominent , appressed ; cardinal area rather narrow but well defined centrally , becoming linear toward the extremities ; foramen ...
... convex , with a broad , very shallow median depression , which is often wanting en- tirely ; beak not prominent , appressed ; cardinal area rather narrow but well defined centrally , becoming linear toward the extremities ; foramen ...
Page 56
... convex , with the mesial sinus broad yet shallow ; beak small , extending but slightly over the hinge area ; cardinal margig provided with from seven to ten spines on each side of the beak . Area narrow , with a wide foramen which is ...
... convex , with the mesial sinus broad yet shallow ; beak small , extending but slightly over the hinge area ; cardinal margig provided with from seven to ten spines on each side of the beak . Area narrow , with a wide foramen which is ...
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Common terms and phrases
13th Ann Actinocrinus Allorisma aperture Athyris Aviculopecten Batocrinus beak Bellerophon Burlington limestone Capulus carbonaria cardinal Chonetes Conularia convex Cooper county costæ crinoid Dorsal valve Dyas in Nebraska Edmondia Fenestella figs flattened gasteropod Geinitz genus Geology Iowa Hall Henry county hinge-line Horizon and localities Horizon and localities.-Lower Horizon and localities.-Upper Illinois incurved Indiana John & Worthen Kansas City Kaskaskia Kaskaskia limestone Keokuk limestone Kinderhook lines of growth localities.-Lower Carboniferous localities.-Upper Carboniferous Louis Acad Lower Carboniferous Macrochilus margin McChesney Meek & Worthen mesial Missouri missouriensis Myalina Naticopsis Nautilus Nebraska Norwood & Pratten occidentalis Orthis Orthoceras Phila Plate Platyceras Platycrinus Pleurotomaria Polypora posterior Proc Productus prominent radiating Rhynchonella ridge rounded Saint Louis limestone Shumard Silurian sinus Soleniscus species specimens Sphærodoma spire Spirifer Spirifera Straparollus striæ Strophomena Surface marked Swallow Terebratula Trans U. S. Geol Ulrich Upper Coal Measures Ventral valve VIII volutions whorls