. Chambers's encyclopedia; a dictionary of universal knowledge for the people. tly, 34 or 36A. D., just prior to the death of Tiberius. The appears upon the coins of Constantine, ,viz., 300 years after the death of Christ, who wasconsidered the P. by the monastic writers. It issupposed by the rabbins to be mentioned in Job andthe Psalms.—Job xxxix. 18; Psalms ciii. 5 ; Herod-otus, ii. 73 ; Achilles Tatius, iii. 25; Tacitus, An.\i. 28; Tselzes, Chil. v. 397 ; Lepsius, Einleit, ; Archceolorjia, vol. xxx. p. 256. PHCENIX. See Date Palm and Palms. PHOLAS, a genus of lamellibra
. Chambers's encyclopedia; a dictionary of universal knowledge for the people. tly, 34 or 36A. D., just prior to the death of Tiberius. The appears upon the coins of Constantine, ,viz., 300 years after the death of Christ, who wasconsidered the P. by the monastic writers. It issupposed by the rabbins to be mentioned in Job andthe Psalms.—Job xxxix. 18; Psalms ciii. 5 ; Herod-otus, ii. 73 ; Achilles Tatius, iii. 25; Tacitus, An.\i. 28; Tselzes, Chil. v. 397 ; Lepsius, Einleit, ; Archceolorjia, vol. xxx. p. 256. PHCENIX. See Date Palm and Palms. PHOLAS, a genus of lamellibranchiate molluscs,of the family Pholadidte. This family, to which theShip-worm {Teredo navalis) also belongs, has theshell gaping at both ends, tliin, white, very hard,sometimes with accessory valves ; the two principalvalves beset with calcareous inequalities, connectedby fine transverse parallel ridges, forming a kind ofrasp, used by the animal for boring a hole in rock,wood, or other substance, in which it lives. Theanimal itself is either club-shaped (as in Pliolas) or. A piece of rock bored by Pholades. worm-shaped (as in Teredo), with large long siphons,often united almost to the end, and a short species are natives of the American Thompsonii is very destructive to wharf tim-ber; Diplothyra Smithii is found in New York har-bour. How the pholades excavate the holes in whichthey live, sometimes in clay, but often in chalk, andeven in much harder rocks, has been the subject ofmuch dispute. It is said that they possess an acidsecretion which acts as a solvent. The shell is studdedwith projections, in regular rows, giving it the charac-ter of a rasp or file; and the P., fixing itself firmlyby its foot, which acts as a sucker, and working itselffrom side to side, makes use of the rasping power ofits shell to enlarge its hole as it has need, so that thehole is always very exactly accommodated to tlic sizeof the occupant. There are numerous fossil spec
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