FREE INSTITUTE OF SCIENCE 



IOIQ 



TERTIARY FAUNA OF FLORIDA 



Tellina strophia n. sp. 

 PLATE 47, FIGURE n. 



(3ligocene of the Chipola River, at Macdonald's farm, Calhoun County, 

 Florida ; Burns. 



Shell elongate, subequilateral, slender, with inconspicuous beaks, rostrate, 

 and sharply sculptured, with low, elevated, close-set concentric lamellae, which 

 become sparser and more prominent on the posterior part of the shell, espe- 

 cially on the rostrum ; posterior dorsal area with two radial folds separated 

 by a shallow sulcus, the upper fold obscure ; lunule very narrow, moderately 

 impressed ; rostrum of the left valve ending in a narrow sharp point ; teeth 

 normal, small ; in the left valve obscure ; pallial sinus elongate, two-thirds 

 confluent below, rounded behind. Lon. 27, alt. II, diam. 5 mm., but probably 

 reaching a size one-third greater, judging by fragments collected. 



This shell recalls T. cuiningii, though smaller and more delicate. 



Tellina segregata n. sp. 

 PLATE 37, FIGURES 7, 8. 



Oligocene of the silex beds at Ballast Point, Tampa Bay, Florida ; Dall. 



Shell small, subovate, subequilateral, beaks low ; anterior end rounded, base 

 evenly arched, posterior end feebly rostrate, obliquely truncate with two radial 

 folds separated by a sulcus ; lunule extremely narrow, impressed, smooth, the 

 escutcheon slightly larger, similar but represented only on the left valve; disk 

 almost compressed, surface finely radially striated, the concentric sculpture of 

 fine, elevated threads, which on the anterior half have a tendency to segregate 

 themselves in groups of four, separated by wider interspaces; near the base, 

 however, the threads become crowded ; as the threads pass backward one after 

 another in each group fails, arid the posterior half therefore shows much 

 sparser threading and wider interspaces, while the persistent threads tend to 

 become lamellose ; the interior of the silicified type of this species is inacces- 

 sible. Lon. 17, alt. 10, diam. 4 mm. 



This species appears to belong to the same group as T. chipolana, but the 

 character of the sculpture is quite different. 



Tellina (Macaliopsis?) merula n. sp. 



PLATE 46, FIGURE 4. 



Oligocene of the Tampa silex beds at Ballast Point. 



Shell small, plump, subovate, anterior end longer, evenly rounded, base 

 convexly arcuate, posterior end slightly flexed, hardly folded; obliquely 



