. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. FOSSILS. 601 hows it to Lc these maiks. Fig. 206. C. elongatus. cardinal line curving, with a scarcely defined ridge along the um- bonial slope; basal margin strongly rounded, sinuate on the postero- basal margin and regularly rounded, with a scarcely defined ridge extending down the slope just anterior to the clavicle. Surface finely striated concentrically,
. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. FOSSILS. 601 hows it to Lc these maiks. Fig. 206. C. elongatus. cardinal line curving, with a scarcely defined ridge along the um- bonial slope; basal margin strongly rounded, sinuate on the postero- basal margin and regularly rounded, with a scarcely defined ridge extending down the slope just anterior to the clavicle. Surface finely striated concentrically, a slightly curving clavicle extending from the cardinal line nearly two-thirds the u'::tanccto the anterior basal margin. This species differs from tlie preceding in the equal length and breadth, and consequent greater proportional height, in the sinuosity of the postero-basal margin, and more abruptly-rounded basal outline, and the curving forward of the beaks. Arisaig. Clidophoviis clongcvia^ Hall (Fig. 206). Shell sub-elliptical, length about twice tlu' height, beaks much nearer to the anterior end, wlrich is narrowly rouiuled; umbones rounded, prominent; a defined gradually widening extends from the umbo to the posterior basal margin, causing a straighten- ing or slight sinuosity in the edge of the shell; a defined ridge along the posterior slope between the sinus and the cardinal margin. Surface very finely striated. A slender clavicle extends from the anterior cardinal margin a little more than half-way io the base, and curving slightly forward. This species differs externally from all the others in the greater proportional length and in the rounded umbones. Tiie C. cuneatus of the same size is a stronger and proportionally higher shell, having a less defined sinus on liio posterior slope, and a much stronger clavicle. Arisaig, coll. J. W. D. Clidophorus semi-radiatus, Hall. Shell somewhat oval-ovate, length about one-third greater than the height. Surface
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
