. Annual report of the Regents. New York State Museum; Science. REPORT OP THE STATE PALEONTOLOGIST 1901 579^ .J This process of dichotomous branching and of the develop- ment of one of the resulting branches into a denticulate branch is repeated with absolute regularity. The result is the forma- tion of four zigzag-shaped principal stems, lying in the diagonals of the rectangle, and of two alternating series of denticulate branches on each of these stems. Fig. 10, 11 are reproductions of more advanced stages which differ from the younger ones principally in the length attained by the denticula

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. Annual report of the Regents. New York State Museum; Science. REPORT OP THE STATE PALEONTOLOGIST 1901 579^ .J This process of dichotomous branching and of the develop- ment of one of the resulting branches into a denticulate branch is repeated with absolute regularity. The result is the forma- tion of four zigzag-shaped principal stems, lying in the diagonals of the rectangle, and of two alternating series of denticulate branches on each of these stems. Fig. 10, 11 are reproductions of more advanced stages which differ from the younger ones principally in the length attained by the denticulate branches. Both specimens bear 24 such. 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; University of the State of New York. Board of Regents. Albany : J. B. Lyon, State Printer

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Keywords: ., bookauthorne, bookcentury1800, bookdecade1880, booksubjectscience