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Volume 58, 1928
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Subgenus Loboplax Pilsbry 1893.

Pilsbry Naut. 1893, vol. 3, p. 32. Type Chiton violaceus, Quoy and Gaimard.

Having multifissate tail-valve, broad insertion-plate at tail, teeth sharp, great extension of girdle which is naked.

Note.—Ashby points out in Trans. Roy. Soc. S. Austr. vol. 45, 1920, p. 289, that Dall's genus Macandrellus falls, as it was founded on Acanthochiton costatus Ad. and Ang. as type, and that species is a true Notoplax.

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Notoplax (Loboplax) violaceus.

Chiton violaceus Quoy and Gaimard, Voy. Astrol. 3, p. 403, 1835.

Chiton violaceus Gould., U.S. Expl. Exped. Moll., p. 331, fig. 420.

Not Chiton violaceus Reeve, Conch. Icon., fig. 41.

Chiton porphyreticus Reeve, Conch. Icon., vol. 10, fig. 56, 1847.

Phacellopleura porphyretica, Cp.M.S.

Loboplax violaceus Pilsbry, Man. Conch. vol. 40, p. 39, figs. 67–73; Proc. Mal. Soc. Lon., 2, p. 193.

Acanthochites violaceus Wissel (l.c.) 20, 616, pl. 21, fig. 30; pl. 23, figs. 31–32 (anatomy).

Loboplax violaceus Thiele (l.c.), pp. 37–39.

Macandrellus violaceus Iredale, Trans. N.Z. Inst. vol. 47, 1914, p. 425.

Acanthochiton violaceus Ashby, Trans. Roy. Soc. S. Austr. vol. 46, 1922, p. 578.

Ashby in “Acan. Chitons of N.Z.” gives photographs of one of Quoy and Gaimard's co-types. In Ashby collection.

Notoplax (Loboplax) violaceous var. papilio.

Chiton violaceus var. papilio Quoy and Gaimard, Voy. Astrol., p. 520.

Acanthochiton violaceus var. Papilio Ashby (l.c.), p. 578.

Loboplax violaceus var. papilio Ashby, in “Acanthoid Chitons of N.Z.” (l.c.)

Type in Mus. d'Hist. Nat. Paris.

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