. Animal biology; Human biology. Parts II & III of First course in biology. Biology. FIG. 273 b.— SIDE VIEW, showing poison fangs ; also tongue (forked, harmless).. FIG. 274. — VIPER'S HEAD, showing poison sac at base of 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 Bailey, L. H. (Liberty Hyde), 1858-1954. New York, The Macmillan Co.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1910