U.S. Geological Survey Professional Paper, Issue 142U.S. Government Printing Office, 1947 - Geology |
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Page 21
... margin sharply elevated toward the umbones but flattening distally . Escut- cheon persisting the entire length of ... inner margin of the hinge , thus interrupting the dental series . Anterior and pos- terior series discrepant ...
... margin sharply elevated toward the umbones but flattening distally . Escut- cheon persisting the entire length of ... inner margin of the hinge , thus interrupting the dental series . Anterior and pos- terior series discrepant ...
Page 26
... margin terminating in an angle , narrow cardinal area , having minute close angulated lines ; cardinal teeth very ... inner margin entire . Type : Academy of Natural Sciences of Philadelphia . Type locality : " Cliffs of Calvert ...
... margin terminating in an angle , narrow cardinal area , having minute close angulated lines ; cardinal teeth very ... inner margin entire . Type : Academy of Natural Sciences of Philadelphia . Type locality : " Cliffs of Calvert ...
Page 29
... inner margin of the valve deeply fluted . Longi- tude 18 , height 11 , diameter 9 millimeters . This little shell looks a good deal like the young of Anadara aresta Dall but has the beaks less central , less prominent , and distinctly ...
... inner margin of the valve deeply fluted . Longi- tude 18 , height 11 , diameter 9 millimeters . This little shell looks a good deal like the young of Anadara aresta Dall but has the beaks less central , less prominent , and distinctly ...
Page 32
... Inner margins fluted in harmony with the external sculpture . Cardinal area ... margin , finely serrate ; the teeth not far from 50 , arranged in two series ... margin , whereas in the adult they converge slightly posteriorly ...
... Inner margins fluted in harmony with the external sculpture . Cardinal area ... margin , finely serrate ; the teeth not far from 50 , arranged in two series ... margin , whereas in the adult they converge slightly posteriorly ...
Page 49
... inner face of the disk is smooth . Pseudamussium differs from the other ... Margin sharply elevated along the groove and out- lined by an obscure thread ... margin shagreened with an exceedingly fine concentric lamination and ...
... inner face of the disk is smooth . Pseudamussium differs from the other ... Margin sharply elevated along the groove and out- lined by an obscure thread ... margin shagreened with an exceedingly fine concentric lamination and ...
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Common terms and phrases
acute adult altitude angulated anteriorly Apertural view arcuate axial sculpture Baileys Ferry base body whorl Calhoun County canal cardinal Chipola formation Chipola River chipolana conch Conrad constricted costals Dall denticles Dimensions dorsal margin elevated fauna feebly FIGURE flattened front Gardner genus grooves height hinge holotype incremental Inner margin labrum later whorls latitude left valve less Liberty County ligament lirae lirate lunule Maury maximum diameter mile below Baileys millimeters Miocene moderately narrow Oak Grove Oak Grove sand obliquely obscure obtuse Occurrence Okaloosa County Outer lip outline pallial line paratype penult periphery pillar Plate posterior fasciole posterior margin posteriorly prominent protoconch radial ribs right valve sharply Shell Bluff Shell small Shoal River formation sinus slender slightly smooth specimens spiral sculpture spire striated subsp suture Trans Type locality U. S. Nat umbones valve cotype varix view of holotype volutions Wagner Free Inst Walton County