. Natural history. Zoology. Fig. 9.— \Vhale-Louse (Cyamus ovalis). Nat, gize. Order II.—Thoracostraca. The present order agrees with the last in the number of segments, but is distinguished from it by having more or fewer of the thoracic segments united with the head by a common shell, or carapace, and there are usually two compound stalked eyes. We find no true parasites in this group, though some of them seek the society of other animals for the sake of food and shelter, as in the case of the small crab which takes up its residence in the shell of the Pinna. Sub-Order I.—Cumacea. Includes sm
. Natural history. Zoology. Fig. 9.— \Vhale-Louse (Cyamus ovalis). Nat, gize. Order II.—Thoracostraca. The present order agrees with the last in the number of segments, but is distinguished from it by having more or fewer of the thoracic segments united with the head by a common shell, or carapace, and there are usually two compound stalked eyes. We find no true parasites in this group, though some of them seek the society of other animals for the sake of food and shelter, as in the case of the small crab which takes up its residence in the shell of the Pinna. Sub-Order I.—Cumacea. Includes small marine species, with sessile eyes, and a long, slender abdomen. Sub-Order II.—Stomatopoda. This order is now restricted to the single (amilj S;£HilUdce, which are marine Crustacea resembling large prawns, three inches or more in length, with the cephalothorax slender, a large tail-fin, and the second pair of foot-jaws developed into an enor- mous claw, which has led to one of the com- mon species being called Squilla mantis (Eondel), on account of the shape and attitude of its legs very closely resembling the predaceous legs of the Mantidie among the Orthoptera. This species swims strongly, and is eaten in Italy, where it attains a length of six inches; in the British seas it does not exceed ^ inches in Fig. 10. —Squii, mantis, ^ Nat. 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 Lydekker, Richard, 1849-1915; Kirby, W. F. (William Forsell), 1844-1912; Woodward, Bernard Barham, 1853-1930; Kirkpatrick, R. (Randolph), b. 1863; Pocock, R. I. (Reginald Innes), 1863-1947; Sharpe, Richard Bowdler, 1847-1909; Garstang, Walter, 1868-1949; Bather, Francis Arthur, 1863-1934; Bernard, Henry Meyners. New York, D. Appleton and company
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