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1403 



TERTIARY FAUNA OF FLORIDA r 



the inner margins are crenulate and the average diameter is about thirty-five 

 millimetres. 



A variety is entirely without foliations, the sulci obsolete, and the divaricate 

 sculpture stronger than usual. A specimen from the Caloosahatchie has smooth 

 internal margins and a diameter of fifty-five millimetres. 



The shell identified with the Indo-Pacific Chama ruderalis Lamarck by 

 Guppy (Paria Fauna, p. 153, 1877) from the Pliocene of Matura, Trinidad, 

 appears, though of rather small size, to be identical with this species. 



Chama macerophylla Gmelin. 

 Chama gryphoides (ex parte) Linne, Syst. Nat., ed. xii., p. 1139, 1767; Dillwyn, i., p. 



221, 1817. 

 Macerophylla, Flos Mads, etc., Chemnitz, Conch. Cab., vii., pp. 101, 149, pi. Hi., figs. 514- 



15, 1784- 



Chama macerophylla Gmelin, Syst. Nat., vi., p. 3304, 1792; Orbigny, Moll. Cubana, ii., p. 



363, 1853- 



Chama citrea Gmelin, op. cit., p. 3305, 1792. 

 Chama lazarus Lamarck, An. s. Vert., vi., p. 93, 1819; Deshayes, op. cit., ed. ii., vi., p. 579. 



1835 (not of Linne) ; Kurtz, Cat. Sh. N. and S. Car., p. 6, 1860. 

 Chama macrophylla Hanley, Descr. Cat. Rec. Biv. Shells, p. 226, 1843; Reeve, Conch. 



Icon., iv., pi. ii., fig. 6, pi. viii., fig. 6b, 1846-7; Arango, Fauna Mai. Cubana, p. 272, 



1878; Krebs, W. I. Mar. Sh., p. 117, 1864; Tryon, Am. Mar. Conch., p. 177, 1874. 

 Chama macerophylla var. purpurascens Poulsen, Cat., p. 15, 1878; and var. sulphurea, 



ibidem, not of Reeve, 1846. ^ 



Chama bicornis Krebs, W. I. Marine Sh., p. 117, in syn. (not of Linne), 1864. 

 Chama imbricata " Lmk.," Krebs, op. cit., p. 117 (not of Broderip) ; Arango, Fauna Mai. 



Cubana, p. 272, 1878. 

 f Chama sinuosa Broderip, Trans. Zool. Soc., i., p. 303, pi. xxxix., fig. ii, 1833; Reeve, 



Conch. Icon., iv., pi. Hi., fig. n, 1846. 



Pleistocene of Cuba, the Antilles, and Curasao, Orbigny and Lorie ; living 

 from Cape Hatteras, North Carolina, to and throughout the Antilles and south- 

 ward to the Abrolhos Islands on the east coast of Brazil. 



This well-known species was named from the fancied resemblance of the 

 foliations to the ramifications of mace, or, as anciently called, the " flower of 

 the nutmeg;" and hence the orthography macrophylla, due originally to an 

 error of the usually most accurate Hanley, is inadmissible. 



The species when best developed has flattish foliations with obsolete radial 

 striation upon them and is attached by the left valve. The living shell may 

 be purple, lemon yellow, or white, and the earlier foliations are semicylindrical. 



