phonautograph (fonatograf)

[ ous internally and with radiating ribs, without hinge IMG:content-0043.jpg:[blocks in formation] Pholadomya candida (left valve). teeth, and with an external ligament. The living species are few, and are found only in very deep water, but in former ages they were very numerous. Pholas (fō'las), n. [NL. (Linnæus, 1758), φωλαδ- ), lurking in a hole, a mollusk that makes holes in stones ( Litho dom us ); cf. φωλεῖν, lurk in a hole, φωλεύς , a hole, lurking-place.j 1. The typical genus of the family Pholadidæ and the subfamily Pholadinæ . It was formerly coextensive with the family, but has been variously subdivided. By recent writers it is restricted to species having the dorsal margin protected by two acce ory valves (see acce ory), anterior and posterior, and with umbonal proce es reflected over the beaks. The species are of some economical value, the Pholas dactylus , called piddock , being marketable and also used as bait in England. 2. [ l. c.] A species of the genus Pholas; a pholad; a piddock. See cut under piddock. Pholcidæ (fol'si-dē), n. pl. [NL. (C. Koch, 1850), in dark places and having either six or eight eyes. The male palpi are very peculiar. Pholcus (fol'kus), n. [NL. (Walckenaer, 1805), [Prop. * pholidite ,