TRANSACTIONS OF WAGNER 

 1032 



TERTIARY FAUNA OF FLORIDA 



distant rather irregular elevated lines ; interior with the upper part of the 

 pallial sinus connecting the adductors and wholly confluent in the pallial line 

 below. Lon. 7, alt. 5, diam. 3 mm. 



This little shell differs from T. Gouldii Hanley by its flexuous posterior 

 end and less regular form. From T. martinicensis d'Orbigny, which is nearly 

 allied, T. suberis differs by its blunter posterior end, less sculptured surface, 

 and wholly confluent pallial sinus below. 



The species associated under the name of Angulus in our later Tertiary 

 are very puzzling. There are about as many forms in the Miocene and Plio- 

 cene as there are in the recent fauna of the coast, and in most cases it may be 

 surmised that the recent forms are the descendants of the fossil ones. The 

 resemblance in many cases is so close that a hasty examination would result 

 in their being united under one name, as I myself did when making provi- 

 sional identification of part of the material here treated. More thorough study 

 has shown that a certain amount of constant difference separates a number 

 of the older forms from their recent representatives, and these have been 

 consequently regarded as distinct in the final arrangement. 



Tellina (Angulus) dupliniana n. sp. 

 PLATE 46, FIGURE 17. 



Miocene of Wilmington, of the Natural Well and Magnolia, Duplin 

 County, North Carolina; of Plum Point, Maryland; and of York River, 

 Virginia; Pliocene of the Waccamaw beds at Mrs. Guion's marl pit, Wacca- 

 maw River, South Carolina; Burns, Harris, and C. W. Johnson. 



Shell small, solid, rather convex, inequilateral, dorsal margins rectilinear, 

 diverging at an angle of about one hundred and eight degrees, anterior end 

 longer, rounded evenly into the base, which is nearly parallel with the anterior 

 dorsal margin ; posterior end much shorter, pointed, the terminal angle slightly 

 decumbent and the basal margin in front of it slightly incurved; beaks in- 

 conspicuous, hinge normal, the right adjacent lateral short and the anterior 

 hinge-margin in front of it grooved for the edge of the opposite valve ; middle 

 of the disk smooth, the beaks, posterior dorsal area, and the portions of the 

 disk near the basal margin more or less concentrically striated ; interior with 

 the pallial sinus rising to a small angle under the umbo, then descending in a 

 somewhat wavy line to a point on the pallial line considerably short of the 

 anterior adductor scar ; in the left valve the sinus is not angulated above and 

 extends somewhat nearer the adductor ; the interior is marked with some 



