. Elements of zoölogy. Zoology. 8o CRABS AND INSECTS. " casting hairs " (Fig. 84). The soft-shelled crab is a re- sult of the casting. They also have the faculty of throw- ing off their limbs and renewing them again. Development. — The young of most crustaceans pass through many changes before assuming the parent form.* The eggs resemble at first minute currants (Fig. 86), that attach themselves by glutinous threads to the appendages * The Australian Dromia is an exception, the young leaving the egg in the adult form, and clinging to the mother. A similar case is seen in the fresh-wa
. Elements of zoölogy. Zoology. 8o CRABS AND INSECTS. " casting hairs " (Fig. 84). The soft-shelled crab is a re- sult of the casting. They also have the faculty of throw- ing off their limbs and renewing them again. Development. — The young of most crustaceans pass through many changes before assuming the parent form.* The eggs resemble at first minute currants (Fig. 86), that attach themselves by glutinous threads to the appendages * The Australian Dromia is an exception, the young leaving the egg in the adult form, and clinging to the mother. A similar case is seen in the fresh-water cray-fish (Fig. 85), Astacus fltiviatilis; the young of some crustaceans (Balanus) appear at first in the Nauplius form, with three pairs of Fig. 85.—Astacus fluviatilis. A, two recently hatched cray-fish attached to one of the swimmerets of the mother; e c, ruptured egg-cases ; B, chela of a recently hatched cray-fish, x 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
