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I 147 



TERTIARY FAUNA OF FLORIDA ' 



the anterior dorsal margin parallel with the base, the anterior end evenly 

 rounded ; posterior dorsal margin arcuate, declining, basal angle rounded ; 

 hinge feeble, the distal lamellae weak and low, the " hook" or subumbonal 

 lamella obscure, low, nearly parallel with the margin ; anterior adductor scar 

 high, narrow; posterior larger, lower, both with a few radial lines. Lon. 8.35, 

 alt. 4, diam. 2.2 mm. 



This is the most elongated species among those of our Tertiary and appears 

 to be rare. 



I Erycina Kurtzii Dall. 



Plate 25, Figure 12. 

 Scintilla Kurtsii Dall, Trans. Wagner Inst., iii., part iv., p. 920, pi. 25, fig. 12, i8g8. 



Pliocene marls of the Caloosahatchie River, Florida ; Dall. 



Shell small, thin, subquadrate, rather compressed, polished, nearly equi- 

 lateral ; beak very low, inconspicuous ; surface sculptured with incremental 

 lines and fine, sharp radial strise visible only with magnification ; hinge nearly 

 obsolete, the lamellae nearly merged with the dorsal margin and the " hook" 

 reduced to a minute angular projection; ends almost equal in length and 

 rotundity; adductor scars rather large, interior smooth. Lon. 8.5, alt. 5.2, 

 diam. 2.2 mm. 



This species resembles E. americaiia, and like it might perhaps be referred 

 to Pseudopythina. It retains some faint traces of the lateral teeth, which the 

 typical Pseudopythina does not. Than E. americana it is more equilateral and 

 differs from it and the other elongate-quadrate species in its fine radial sculp- 

 ture, which led to its reference in 1898, after a hasty exami;iation, to Scintilla 

 instead of its proper genus Erycina, which became evident after more careful 

 study. Only one right valve was obtained. It is named in honor of Lieutenant 

 J. D. Kurtz, the associate of Stimpson in the investigation of the shells of the 

 Carolina coast. The Lepton Kurtzii of the list of Waccamaw shells on page 

 2T0 (part ii.) is the shell above described under the name of Erycina caro- 

 linensis, and not the present species. 



Genus BORNIA Philippi. 



< Bornia Philippi, Moll. Sicil., i., p. 13, 1836. First species B. corbuloides Phil. (Bivona 



as Erycina), op. cit., p. 14, pi. i, fig. 15, 1836. 



< Kellia Philippi, Moll. Sicil., ii., p. 10, 1844, 



Erycina (sp.) Recluz, Revue Zool., vii., pp. 327, 333, 1844. 



