. Beginners zoology. Zoology. -A Sea Ukchin crawling up tlie glass front wall of an aquarium (showiijj; mouth spines and tube feet).. — A Sea Urchin with spines removed, the limy plates showing the knobs on which the spines 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 Coleman, Walter M. Toronto : Macmillan

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Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921