U.S. Geological Survey Professional Paper, Issue 142U.S. Government Printing Office, 1947 - Geology |
From inside the book
Page 9
... flattened but not depressed . A subcutaneous radial sculpture developed , usually obsolete in the umbonal region but fine and regular toward the base , where the sulci number about 12 to the millimeter and are separated by flat ...
... flattened but not depressed . A subcutaneous radial sculpture developed , usually obsolete in the umbonal region but fine and regular toward the base , where the sulci number about 12 to the millimeter and are separated by flat ...
Page 11
... flattened : The other characters - general outline , umbones , lunule , escutcheon , dentition , and muscle and mantle scars - vary but little . The Shoal River forms as a rule are larger than those from the Chipola and , on the whole ...
... flattened : The other characters - general outline , umbones , lunule , escutcheon , dentition , and muscle and mantle scars - vary but little . The Shoal River forms as a rule are larger than those from the Chipola and , on the whole ...
Page 41
... flattened . Ostrea trigonalis Conrad . Outline narrowly ovate , usually elongated , not radi- ally plicate ; ligament area usually high , narrow , and medially excavated Ostrea normalis Dall . Ostrea pauciplicata Dall Plate X , Figures ...
... flattened . Ostrea trigonalis Conrad . Outline narrowly ovate , usually elongated , not radi- ally plicate ; ligament area usually high , narrow , and medially excavated Ostrea normalis Dall . Ostrea pauciplicata Dall Plate X , Figures ...
Page 42
... flattened and subcircular to broadly ovate in outline , the left a little more convex as a rule than the right and a little broader . Left valve strongly plicate , the right vari- able , in some individuals similar in sculpture to the ...
... flattened and subcircular to broadly ovate in outline , the left a little more convex as a rule than the right and a little broader . Left valve strongly plicate , the right vari- able , in some individuals similar in sculpture to the ...
Page 49
... flattened toward the umbones . Left valve flattened . Umbones acute , rising a little above the hinge line . Anterior dorsal margins acutely angulated , slightly more produced than the obtusely angulated posterior margins . Surface of ...
... flattened toward the umbones . Left valve flattened . Umbones acute , rising a little above the hinge line . Anterior dorsal margins acutely angulated , slightly more produced than the obtusely angulated posterior margins . Surface of ...
Other editions - View all
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