. 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. Chonetes hemispherica. Chonetes AECUATA (). Shell semicircular, greatest width being along the hinge-line, which terminates in short, slightly depressed, triangular ears, extending a little beyond the body of the shell : dorsal valve profoundly concave, corresponding very nearly with the curva- ture of the opposite valve : ventral valve ventricose, forming an elevated arch
. 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. Chonetes hemispherica. Chonetes AECUATA (). Shell semicircular, greatest width being along the hinge-line, which terminates in short, slightly depressed, triangular ears, extending a little beyond the body of the shell : dorsal valve profoundly concave, corresponding very nearly with the curva- ture of the opposite valve : ventral valve ventricose, forming an elevated arch from beak to front, sometimes having a faint depression in the middle from near the umbo to the anterior margin ; umbonal region prominent; beak incurved, and rising a little above the hinge-line. Surface marked by numerous fine regular striae, which increase both by bifurcation and im- plantation, and are crossed by very fine obscure concentric 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
