. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 253 almost vertically-truncate posterior end; well-marked angular mnlto- nal ridge; strong, even, uniform, angular concentric striae. Found in the Encrinal limestone, at Section 5 (very rare); nine to twelve feet below the Encrinal limestone, at Section 7; twenty- five feet below the Encrinal lime- stone, in Idlewood Ravine; and in the Pleurodictyum beds, and the shales just above, and down to and in the Strophalosia bed, in Avery's ('reek, and on the Lake Fig. 100. CypricardeUa
. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 253 almost vertically-truncate posterior end; well-marked angular mnlto- nal ridge; strong, even, uniform, angular concentric striae. Found in the Encrinal limestone, at Section 5 (very rare); nine to twelve feet below the Encrinal limestone, at Section 7; twenty- five feet below the Encrinal lime- stone, in Idlewood Ravine; and in the Pleurodictyum beds, and the shales just above, and down to and in the Strophalosia bed, in Avery's ('reek, and on the Lake Fig. 100. CypricardeUa belli- striata. A specimen retaining both valves in conjunction if'roin Hall). Genus NDCULA. Lamarck. [Ety. : Nucula, a little nut.] (1801: Syst. An. Sans. Vert., p. 87.) ''Shell small, inequilateral, trigonal or transversely ellip- tical or sub-circular. Anterior or posterior extremity some- times produced, usually rounded. Beaks anterior or posterior to the middle of the length, often sub-central. Cardinal line arcuate. Escutcheon marked. Surface marked by concentric striae, which, in some species, are regular and rugose. Hinge furnished with a triangular, spoon-shaped cartilage-pit beneath the beaks, with a series of small trans- verse teeth on each side. There are two principal muscular impressions on each valve, with usually a smaller retractor scar adjacent, and also the cavity of the beaks often shows several pits for the attachment, of umbonal muscles. Pallia) line ; (Hall, Pal. N. Y., Vol. V., Pt, I., p. xxvi.) Nucula corbuliformis. Hall. (Fig. 169A.) (Pal. X. Y., Vol. V, Pt, I., p. 319, PI. XLVI.) Distinguishing Characters.— Broadly triangular, sub- ovate outline; length about one-fourth greater than height; longer, more pointed posterior end; broad and slightly in- curved beaks, from which the cardinal line declines in both. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colo
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectnaturalhistory, booky
