TRANSACTIONS OF WAGNER 

 I2 5 8 



TERTIARY FAUNA OF FLORIDA 



This shell has a hinge recalling that of Venus mercenaria and is a strictly 

 Brazilian species, confused by Deshayes with one from West Columbia, on 

 the Pacific coast. It was called Chione purpurascens by Gray in 1838. La- 

 marck himself noted the peculiarity of the hinge, which does not seem to have 

 been referred to since. 



Amiantis callosa Conrad. 



Cytherea callosa Conrad, Journ. Acad. Nat. Sci., vii., p. 252, 1837. 

 Venus callosa Sowerby, Thes. Conch., ii., p. 712, pi. cliv., figs. 44, 45, 1853. 

 Dosinia callosa Carpenter, P. Z. S., 1856, p. 216. 

 Amiantis callosa Carpenter, Ann. Mag. N. Hist., 3d Ser., xv., p. 178, 1865 ; Suppl. Rep. 



Brit. Assoc., p. 640, 1864; Gabb, Pal. Cal. r ii., p. 96, 1869. 

 Dione nobilis Reeve, P. Z. S., 1849, p. 126; Conch. Icon., xiv., Dione, pi. iv., fig. 15, 1863. 



Pleistocene of Southern and Lower California, at San Pedro, San Diego, 

 Todos Santos Bay, etc. ; living from Santa Barbara to the Gulf of California. 



This splendid shell is one of the most characteristic types of the Southern 

 Calif ornian coast. It varies in relative length, the short suborbicular form 

 being Reeve's Dione nobilis; the more elongated shell is that originally de- 

 scribed from a young specimen by Conrad. This reference to it is included 

 here, as it is the only representative on our coast of the genus to which it 

 belongs. 



Genus MBBETRIX Lamarck. 

 Meretrix Lamarck, Prodrome, p. 85, 1799 (Venus meretrix Linne) ; Syst. des An. s. 



Vert, p. 122, 1801 ; Bosc, Hist. Nat. Coq., iii., p. 42, 1801 ; Froriep's Dumeril, Zool. 



Anal., p. 169, 1806; Blainville, Man. Mai., p. 556, 1825; Gray, P. Z. S., 1847, P- 183; 



Deshayes, Cat. Conch. Brit. Mus., pp. 4, 34, 1853; Morch, Cat. Yoldi, ii., pp. 25, 28, 



1853; H. and A. Adams, Gen. Rec. Moll., ii., p. 423, 1857; Romer, Krit. Unters., p. 



14, 1857 ; Mon. Venus, i., p. 25, 1865 ; Fischer, Man. de Conchyl., p. 1079, 1887. 

 Citherea Roissy (as of Lam.), Moll., vi., pp. 329, 336, 1805 (Venus meretrix L.). 

 Cytherea Roissy, op. cit., p. 339, 1805 (C. lusoria Lamarck) ; Lamarck, Ann. du Museum, 



vii., p. 133, 1806: An. s. Vert., v., p. 561, 1818; Brown, Zool. Textb., p. 449, 1833; 



Gray, Analyst, viii., p. 303, 1838; Morch, Yoldi Cat., ii., p. 25 (in syn.), 1853; 



Romer, Krit. Unters., p. 14, 1857; Stoliczka, Cret. Pel. India, p. 150, 1871; Tryon, 



Syst. Conch., iii., p. 177, 1884: not Cytkerea Bolten ^^^ 



Cytheraa Def ranee, Diet. Sci. Nat., ---ii., p. 4. Sowerby, Theb. iT- onc h-> ii-, P- 611, 



1851. 

 Nympha Morch, Cat. Yoldi, ii., p. 25, 1853, as of Martini (non-binomul) in I'erz., 1774; 



not Nympha Fitzinger, Rcptilia, 1826, or Kraust-. Lepidoptcra, 



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