. Bulletin - New York State Museum. Science. ^ ( ,1 •^ /. Fig. 25 Bythotrephis gracilis; showing varieties, a B. gracilis; & B. gracilis var. intermedia; c B. gracilis var. crassa Found in the shaly partings separating the thin beds of the lower Clinton limestone at Niagara. Bythotrephis lesquereuxi Grote & Pitt (Fig. ) (1876. Buifalo soc. nat. sci. Bid. 3:88, 4:20, fig. 6) Distinguishing characters. Flattened, erect stem; sim- ple, sparingly dichotomous branches, 3-4 mm thick, gradually widening to near- ly I cm at the very obtuse or round truncate point; Fig. 26 Bythotrephislesaue

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. Bulletin - New York State Museum. Science. ^ ( ,1 •^ /. Fig. 25 Bythotrephis gracilis; showing varieties, a B. gracilis; & B. gracilis var. intermedia; c B. gracilis var. crassa Found in the shaly partings separating the thin beds of the lower Clinton limestone at Niagara. Bythotrephis lesquereuxi Grote & Pitt (Fig. ) (1876. Buifalo soc. nat. sci. Bid. 3:88, 4:20, fig. 6) Distinguishing characters. Flattened, erect stem; sim- ple, sparingly dichotomous branches, 3-4 mm thick, gradually widening to near- ly I cm at the very obtuse or round truncate point; Fig. 26 Bythotrephislesauereuxl. 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