. Bulletin - New York State Museum. Science. Spirifer cymindis var. sparsa presents us chiefly with a series of internal casts in which there are some differences of expression, noted in particular in the fol- lowing enumeration: 1 Size. The shells are of medium size, uniformly approaching S. arduennensis and S. cymindis in dimensions. Dif- ferences in size and age are expressed on the internal cast by a clearer definition in the younger and thinner shelled examples. 2 Outline and contour. The marginal outline is subtriangular, the hinge being long and sometimes extended at the angles, the. Pl
. Bulletin - New York State Museum. Science. Spirifer cymindis var. sparsa presents us chiefly with a series of internal casts in which there are some differences of expression, noted in particular in the fol- lowing enumeration: 1 Size. The shells are of medium size, uniformly approaching S. arduennensis and S. cymindis in dimensions. Dif- ferences in size and age are expressed on the internal cast by a clearer definition in the younger and thinner shelled examples. 2 Outline and contour. The marginal outline is subtriangular, the hinge being long and sometimes extended at the angles, the. 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; New York State Museum. Albany : New York State Education Dept
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
