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631 

 TERTIARY FAUNA OF FLORIDA 



A single specimen of this interesting shell was obtained, adding a new 

 group to the list of Eocene forms found in the Claibornian. The hinge is 

 somewhat like that of Area {Ciiciillaria) Caillati Deshayes, but wants the 

 central vertical denticles. The form is more like that of A. gracilis Desh., 

 but wider and more regular. 



Barbatia (Cucullaria) taeniata n. s. 

 Plate 25, Figure i, la. 



Pliocene marls of the Caloosahatchie and Shell Creek, Florida, Dall and 

 Willcox, and of the Croatan beds of North Carolina, at Mrs. Guion's marl 

 pit, C. W. Johnson. 



Shell thin, elongated, arcuate, mesially compressed, in general inflated ; 

 the beaks near the anterior fifth; anterior end rounded, short; posterior 

 higher, produced, and bent down ; base receding mesially ; cardinal area short 

 and wide in front of the beaks, long and narrow behind them, in front smooth 

 or longitudinally striated, behind with a few oblique grooves ; sculpture of 

 small, flat, radial ribs arranged in pairs with narrower interspaces, and between 

 every set of two pairs and the next a wider interspace, as if the ribs were 

 quadripartite; these ribs cover all the shell, more sparsely on the posterior 

 dorsal slope, and are crossed at wide but not perfectly regular intervals b)' 

 narrow, flat, concentric ridges ; inner margin of the valves smooth, except 

 when modified by the external ribbing; hinge two-thirds as long as the shell, 

 with four rather large oblique anterior teeth separated by a wide edentulous 

 gap from a row of about twenty short vertical teeth, which merge into a 

 group of six or seven oblique posterior teeth, becoming larger distally; the 

 extreme distal teeth in full-grown specimens sometimes break up into irregu- 

 lar granules. Length of adult shell 52, of hinge-line 29, alt. of shell 23, 

 diam. 21 mm. 



Subgenus NOETIA Gray. 



Area (Noetia) limula Conrad. 

 Plate 31, Figures 14, \\b. 

 Area Ihimhi Conr., Eos. Tert. Form., p. 15, pi. I, fig. i, 1832. New Berne, North 

 Carolina. 



Miocene : North Carolina, at Wilmington, New Berne ; Virginia, at 

 various points on the York and James Rivers ; also in Maryland and South 

 Carolina, and at Heislerville, Cumberland County, New Jersey. Pliocene : 

 De Leon Springs, Florida, Wright; in the marls of the Caloosahatchie and 



