U.S. Geological Survey Professional Paper, Issue 142U.S. Government Printing Office, 1947 - Geology |
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Page 8
... hinge teeth , sepa- rated by a triangular chondrophore ; surface generally smooth or concentrically striated ; margins simple or crenulate ; adductor impressions subequal , two in number ; pallial line simple . Nucula is represented in ...
... hinge teeth , sepa- rated by a triangular chondrophore ; surface generally smooth or concentrically striated ; margins simple or crenulate ; adductor impressions subequal , two in number ; pallial line simple . Nucula is represented in ...
Page 9
... Hinge rather delicate . Teeth taxo- dont , arranged in two discrete series , the posterior including six in the type , the anterior three times as many . The half dozen umbonal teeth in the anterior series exceedingly small and crowded ...
... Hinge rather delicate . Teeth taxo- dont , arranged in two discrete series , the posterior including six in the type , the anterior three times as many . The half dozen umbonal teeth in the anterior series exceedingly small and crowded ...
Page 16
... hinge teeth . Posterior adductor scar much smaller , slightly sunken , elongated parallel to the dorsal margin . Pallial sinus very short , rather broad , ascending . Pallial line at a moderate distance from the basal margin . a ...
... hinge teeth . Posterior adductor scar much smaller , slightly sunken , elongated parallel to the dorsal margin . Pallial sinus very short , rather broad , ascending . Pallial line at a moderate distance from the basal margin . a ...
Page 18
... hinge margin also slightly raised . Concentric sculpture quite sharp and regular upon the escutcheon but more or less obsolete upon the lunule . Anterior dorsal margin not far from horizontal , merging Type : U. S. Nat . Mus . 352297 ...
... hinge margin also slightly raised . Concentric sculpture quite sharp and regular upon the escutcheon but more or less obsolete upon the lunule . Anterior dorsal margin not far from horizontal , merging Type : U. S. Nat . Mus . 352297 ...
Page 19
... hinge and exceedingly small and crowded near the chondrophore . Anterior adductor scar obscure , irregular in outline , placed directly within the distal extremity of the hinge . Posterior scar smaller but much more distinct , elongated ...
... hinge and exceedingly small and crowded near the chondrophore . Anterior adductor scar obscure , irregular in outline , placed directly within the distal extremity of the hinge . Posterior scar smaller but much more distinct , elongated ...
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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 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 Yellow River