. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. Science. No. 109.] 65 ResemWes Spirifer keteroclitus of Von Buch, but has more plications and a wider foramen, whicli appears to be never quite closed as in that species. The area is also generally less extremely elevated in our shell. Geological position and locality. Oriskany sandstone, Cumberland, Md. Rhynchonella semiplicata (n. s.). Pal. Vol. iii, pi. 29, f. 1. Shell (in the young state) compr
. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. Science. No. 109.] 65 ResemWes Spirifer keteroclitus of Von Buch, but has more plications and a wider foramen, whicli appears to be never quite closed as in that species. The area is also generally less extremely elevated in our shell. Geological position and locality. Oriskany sandstone, Cumberland, Md. Rhynchonella semiplicata (n. s.). Pal. Vol. iii, pi. 29, f. 1. Shell (in the young state) compressed-ovate, becoming more gibbous and subtriangular : valves nearly equal; ventral valve slightly more gibbous, most prominent in the middle, and having towards the front a more or less defined mesial sinus, in 'which, there are from one to two plications, while from one to three lateral plications occupy the space on each side of the sinus; beak closely incurved over that of the opposite valve : dorsal valve depressed-convex, having from two to four rounded pli- cations on each side of the medial fold, whicli is itself bifid or trifid; plications strongly marked in front, and usually becoming obsolete near the middle of the valve. Surface having traces of extremely fine radiating striae, crossed by concentric undulations of growth. Geological position and locality. Pentamerus limestone of the Lowe Helderberg group, Albany and Schoharie HhTNCHONELLA 8£ [Senate No. 109.]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum. Albany, Regents of the University of the State of New York
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
