. Annual report. New York State Museum; Science; Science. SOME NEW DEVONIC EOSSILS 259 side and each of the large ones bears a slight furrow along its flat top. The median fold is relatively narrow and not highly ele- vated. The shell is short-hinged and rotund in form. The sur- face is covered with close concentric fimbriate lines which bend backward at the middle of each sulcated rib. I have seen but a single dorsal valve of this interesting species but its differential characters are very distinct. Lower Devonic. Edmunds Hill, Chapman Plantation, Me. Spirifer macropleuroides nov. The Chapma
. Annual report. New York State Museum; Science; Science. SOME NEW DEVONIC EOSSILS 259 side and each of the large ones bears a slight furrow along its flat top. The median fold is relatively narrow and not highly ele- vated. The shell is short-hinged and rotund in form. The sur- face is covered with close concentric fimbriate lines which bend backward at the middle of each sulcated rib. I have seen but a single dorsal valve of this interesting species but its differential characters are very distinct. Lower Devonic. Edmunds Hill, Chapman Plantation, Me. Spirifer macropleuroides nov. The Chapman Plantation fauna carries a representative of the Radiati or group of Spirifer plicatellusina species which has the aspect of a small Sp. macropleura Conrad,1 an ex- treme expression of the form presented by S. togatus Barrande and variety subsinuata A. Roemer2; the first from the New Scotland Helderbergian of New York and the others from the low- est Devonic of the Hartz and Bohemia. In S. macropleuroides the shell is more sharply plicate than in the others, the plications being two or three in number. 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 : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
