Rattlesnake Poison Apparatus

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“Poison apparatus of rattlesnake. A, eye; Gc, poison-duct entering the poison-fang at +; Km, muscles of mastication partly cut through at *; Mc, masseter or constrictor muscle; Mc’, continuation of the constrictor muscle to the lower jaw; N, nasal opening; S, fibrous poison-sac; z, tongue; za, opening of the poison-duct; zf, pouch of mucous membrane enclosing the poison-fangs.” -Parker, 1900


Parker, T. Jeffrey A Manual of Zoology (New York, NY: The MacMillan Company, 1900)


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