. Elements of zoölogy. Zoology. FlG. 108.—Horseshoe crab. A, Limulus Mo/uccanus, dorsal view. B, Limulus rotundicauda, ventral view (after Milne-Edwards) : a, ante- rior ; &, middle division of the body ; c, telson ; d, subfrontal area; e, antennules ; f, antenna ; g, operculum ; k, breathing appendages. domen forms a long, sharp spine. The cephalo-thorax is broad, shaped like a horse's foot; the feet are arranged about the mouth. The abdomen bears six pairs of broad swimming feet, the second pair having upon their under side a set of about one hundred respiratory leaves or plates. The you
. Elements of zoölogy. Zoology. FlG. 108.—Horseshoe crab. A, Limulus Mo/uccanus, dorsal view. B, Limulus rotundicauda, ventral view (after Milne-Edwards) : a, ante- rior ; &, middle division of the body ; c, telson ; d, subfrontal area; e, antennules ; f, antenna ; g, operculum ; k, breathing appendages. domen forms a long, sharp spine. The cephalo-thorax is broad, shaped like a horse's foot; the feet are arranged about the mouth. The abdomen bears six pairs of broad swimming feet, the second pair having upon their under side a set of about one hundred respiratory leaves or plates. The young resemble the extinct trilobites, to which they are allied. Some of the extinct forms, as Fig. 109, attained a length of nine feet. Value of Crustaceans.—They are all valuable scavengers. The crab, lobster, and shrimp fisheries give employment to thousands of persons. The cocoanut-husks that the great Birgos tears up to line its nest are used by the Malays in basket and mat making. Concretions. 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 Holder, Charles Frederick, 1851-1915; Holder, Joseph Bassett, 1824-1888, joint author. New York : D. Appleton and company
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
