. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. narrow, ounded; posterior curved, straight concen- FOSSILS. 608 Tliis shell resembles the T. machceriformis^ but tlio anterior end is proportionally longer and more regularly round, the posterior narrower and more attenuated, and the convexity of the shell much greater. It is much smaller and proportionally more elongated than the T. nasula of the "JV
. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. narrow, ounded; posterior curved, straight concen- FOSSILS. 608 Tliis shell resembles the T. machceriformis^ but tlio anterior end is proportionally longer and more regularly round, the posterior narrower and more attenuated, and the convexity of the shell much greater. It is much smaller and proportionally more elongated than the T. nasula of the "JVcnton limestone. Arisaig, coll. J. W. D. Tellinomya angustata, Hall. Shell elongate, narrow elliptical, more than twice as long as wide, beaks fully one-third from the anterior end. The anterior and posterior ends similar and equally rounded ; basal margin regularly curved without indentation or sinuosity. Sur- face evenly convex and very finely concentrically striated. Arisaig, coll. J. W. D. Leptodomus (Sanguinolites) aratus, Hall. Shell rhomboid-ovate, ventricose, beaks at the anterior third of the valve, incurved and pointed forward, umbones gibbous, a slight depression from the umbo directly to the base of the shell, leaving a slight impression in the central margin; posterior slope sub-angular, the angle not defined ; anterior slope with a defined angular ridge which borders a large cordiform lunette; anterior 8haii)]y rounded; basal margin nearly parallel with the hinge-line, curving upwards at the posterior extremity, and somewhat obliquely truncated from the cardinal line. Cardinal line straight posteriorly, with a wide and deep ligamcntal area. Surface marked by strong unequal ridges and furrows parallel to the bi. d margin, which become obsolescent on the posterior car- dinal slope. It is scarcely possible to refer any fossil with satisfaction to the genera Sanguinolites or Leptodomus of M'Coy, since the grouping of .species under these names appears to us to co
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
