. Text book of zoology. Zoology. 1 B Fig. 89. Shell of a Eegular Sea-nrchin, Toxoptieustes Droebachiensis (young speoimen, enlarged), from above (A) and from below (B). The radii are dark, g genital plate, m madreporite, o ocular plate. In the middle of A is the anal area with the anus,— 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 Boas, J. E. V. (Johan Erik Vesti), 1855-1935; Boas, J. E. V. (Johan Erik Vesti), 18

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. Text book of zoology. Zoology. 1 B Fig. 89. Shell of a Eegular Sea-nrchin, Toxoptieustes Droebachiensis (young speoimen, enlarged), from above (A) and from below (B). The radii are dark, g genital plate, m madreporite, o ocular plate. In the middle of A is the anal area with the anus,— 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 Boas, J. E. V. (Johan Erik Vesti), 1855-1935; Boas, J. E. V. (Johan Erik Vesti), 1855-1935. Lehrbuch der Zoologie. London, Sampson Low, Marston

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896