Reports, Volume 5 |
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Page 18
... flattened , reticulated frond , with a large expanded basal portion attached to foreign objects . Zoœcial openings somewhat reniform , regularly arranged in rows . Horizon and localities . - Lower Carboniferous , Burlington limestone ...
... flattened , reticulated frond , with a large expanded basal portion attached to foreign objects . Zoœcial openings somewhat reniform , regularly arranged in rows . Horizon and localities . - Lower Carboniferous , Burlington limestone ...
Page 24
... flattened and compara- tively coarsely striated on the non - poriferous side , bifurcating at rather regular intervals of from 0.20 to 0.25 inch , the divi- sions diverging but slightly ; fenestrules oblong or about once and a half to ...
... flattened and compara- tively coarsely striated on the non - poriferous side , bifurcating at rather regular intervals of from 0.20 to 0.25 inch , the divi- sions diverging but slightly ; fenestrules oblong or about once and a half to ...
Page 47
... flattened posteriorly . Sur- face marked by numerous fine , radiating coste , and on the ventral side by a few scattered spines . Horizon and localities . - Upper Carboniferous , Coal Meas- ures : Calhoun ( Henry county ) , Kansas City ...
... flattened posteriorly . Sur- face marked by numerous fine , radiating coste , and on the ventral side by a few scattered spines . Horizon and localities . - Upper Carboniferous , Coal Meas- ures : Calhoun ( Henry county ) , Kansas City ...
Page 49
... flattened centrally , con- cave toward the margins . Surface marked by broad , concen- tric wrinkles , and obscure , interrupted radiating costæ , set with numerous short , stout spines , with fewer long ones inter- spersed . Horizon ...
... flattened centrally , con- cave toward the margins . Surface marked by broad , concen- tric wrinkles , and obscure , interrupted radiating costæ , set with numerous short , stout spines , with fewer long ones inter- spersed . Horizon ...
Page 50
... flattened more or less , carved toward the anterior margin . Surface of both valves marked by strong , rounded , radiating ribs , some of which bifurcate ; in the visceral region these are crossed by many concentric folds . Spines stout ...
... flattened more or less , carved toward the anterior margin . Surface of both valves marked by strong , rounded , radiating ribs , some of which bifurcate ; in the visceral region these are crossed by many concentric folds . Spines stout ...
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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