. Chordate morphology. Morphology (Animals); Chordata. mucous gland pigment cells Figure 8-12. Somewhat diagrammatic section of frog skin (Rona pip/ens).. 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 Jollie, Malcolm. New York, Reinhold

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