FREE INSTITUTE OF SCIENCE 



1 143 



TERTIARY FAUNA OF FLORIDA 



Hinge like Pseudopythina, one cardinal in each valve; resilium long, nar- 

 row ; valves truncate behind. This is regarded by Bernard as probably the 

 fry of a Lucinoicl shell. 



Lutetina Velain, of the same publication, is from Bernard's recent figures * 

 referable to the vicinity of Neolepton, where it may perhaps form a separate 

 section. Without his figures it could not be identified. 



For the proper determination of these minute exotic forms it is generally 

 unsafe to depend upon anything but the actual specimens, as experience has 

 repeatedly shown the incapacity of many draughtsmen to clearly delineate 

 objects whose characters are so minute and unfamiliar as the hinges of these 

 little shells. I am therefore obliged to omit any characterization of several 

 such forms. 



A few American Eocene species of Erycina have been described. From 

 the Claibornian are Erycina Whitfieldi Meyer (Ala. Bull., p. 82, pi. I, fig. 20, 

 1886) and a form which Cossmann (Notes Compl., p. 12, 1894) has indicated 

 as (a flatter, more equilateral, and more oblong) variety Meyeri. From the 

 Jacksonian Meyer has described E. Zitteli (Ber. Senckenb. Nat. Ges., 1887, 

 p. n, pi. 2, fig. 8) and a form which he refers to E. Whitfieldi, but which if 

 his figure is reliable is more likely to be a variety of E. Zitteli or even a distinct 

 species. Ncccromya quadrata Gabb (Geol. St. Dom., p. 247, 1873, and Proc. 

 Acad. Nat. Sci. Phila. for 1872, p. 274, pi. 10, figs. 4 a-b, 1873) is a typical 

 Erycina, as I have determined from an examination of the types. It is found 

 in the Oligocene of St. Domingo and Bowden, Jamaica. To these we are now 

 enabled to add the following species : f 



Erycina plicatula n. sp. 

 PLATE 44, FIGURES 7, 12. 



Eocene of the Claiborne sands at Claiborne, Alabama. 



Shell compressed, ovate, inequilateral, the anterior side longer; beaks low, 

 pointed, somewhat prosoccelous ; surface near the beaks faintly concentrically 

 striate or smooth ; about half-way to the margin from the umbo the sculpture 

 grows stronger, consisting of fine, low, rather sharp plications, not always 

 continuous nor in exact harmony with the incremental lines ; anterior dorsal 



* Bull. Mus. d'Hist. Nat., 1898, No. 2, p. 79. 



t Several tmdescribed species are in the collections of the Maryland Geological 

 Survey from the Miocene. 



