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1285 



TERTIARY FAUNA OF FLORIDA 



Cyclinella cyclica Guppy. 



Dosinia cyclica Guppy, Quart. Journ. Geol. Soc., xxii., p. 582, pi. xxvi., fig. 15, 1866. 



Cyclina cyclica Gabb, Geol. St. Domingo, p. 250, 1873. 



Lucinopsis cyclicus Dall, Proc. U. S. Nat. Mus., xix., p. 329, 1896. 



Eocene of Trinidad at Manzanilla, Guppy, and probably of St. Domingo, 

 Gabb. 



This species has a subquadrate shape and differs from all the recent species 

 in having a close concentric sculpture of fine, sharp, somewhat elevated lines. 

 The lunule is large and lanceolate and the hinge typical. Guppy's types are in 

 the collection of the United States National Museum. 



Cyclinella gatunensis n. sp. 

 PLATE 52, FIGURE 18. 



Eocene of the Gatun beds on the line of the Panama Canal at Gatun, 

 Colombia; R. T. Hill. 



Shell thin, suborbicular, nearly equilateral, with inconspicuous beaks ; 

 moderately convex; sculptured with fine, concentric, scarcely elevated lines, 

 near the beaks and on the middle of the disk nearly smooth ; lunule elongate, 

 lanceolate, defined by an incised line, not impressed; interior inaccessible. 

 Height 44, breadth 43, diameter about 15 mm. 



This species differs from C. cyclica in form, in its finer and less elevated 

 sculpture, and in being a more thin and delicate shell. The lunule is also 

 narrower and proportionately smaller. 



Cyclinella tenuis Re"cluz. 



Dosinia (Artemis) tenuis Recluz, Journ. de Conchyl., iii., p. 250, pi. x., figs, i, i', 1852; 



iv., p. 415, 1853; Krebs, West Indian Mar. Shells, p. 99, 1864; not Artemis tenuis 



Sowerby, 1852. 



Cyclina tenuis Beau, Cat. Coq. Guadeloupe, p. 24, 1858. 



Dosinia tenuis Poulsen, Cat. West India Shells, p. 15, 1878. 



Lucinopsis tenuis Petit, Journ. de Conchyl., v., p. 155, 1856. 



Lucinopsis kroyeri Poulsen, Cat. West India Shells, p. 15, 1878; not of Philippi. 

 Lucinopsis gundlachi Dunker, in Arango, Fauna Mai. Cubana, p. 252, 1878. 

 Mysia tenuis Dall and Simpson, Moll, of Porto Rico, p. 487, 1901. 



Pliocene of the Caloosahatchie River, Florida, Dall; living (in about two 

 fathoms, sand) from Cedar Keys, West Florida, south through the West 

 Indies and southward to San Paulo, Brazil. 



