TRANSACTIONS OF WAGNER 



^ TERTIARY FAUNA OF FLORIDA 



leaving the shell practically smooth. Though the shell has long been labelled 

 with Shuttleworth's name in collections, the first published description I have 

 met with is that of Mr. E. A. Smith, above referred to. Conrad's specific 

 name is preoccupied. The fossils agree exactly with the living specimens, 

 except that those from the Oligocene are usually somewhat smaller than the 

 full-grown recent shells. 



Barbatia (Fossularca ?) ovalina n. s. 

 Plate 32, Figure 18. 



Oligocene marl of Bowden, Jamaica; rare; Henderson and Simpson. 



Shell minute, solid, ovate, with rather inflated valves; beaks low in the 

 anterior fourth, prosogyrate ; cardinal area short, narrow, smooth, or longi- 

 tudinally striate, the part occupied by the ligament forming a small excavated 

 triangle with the apex at the beak in each valve ; surface nearly smooth, 

 sculpture of faint, irregular, concentric lines, crossed by still fainter sparse 

 radiations which are not pronounced enough to modify the surface; inner 

 margin of valves smooth ; muscular impressions large ; hinge short with 

 about three crowded anterior and four oblique posterior teeth, the two series 

 separated by a wide gap below the ligament. Lon. 3.2, alt. 2.5, diam. 2 mm. 



A single specimen of this curious little shell, with the form of a Nuatla, 

 the cardinal margin of a Liviopsis, and the teeth of an Area, was found in the 

 marl. It should, perhaps, be referred to Lissarca Smith. 



Section Ciiciillaria Conrad. 



Barbatia (Cucullaria) Aldrichi n. s. 



Plate 32, Figure 19. 



Claiborne sands, Claiborne, Alabama; Burns. 



Shell small, elongate, thin, somewhat pointed behind, rounded in front, 

 moderately convex, with low, prosogyrate beaks ; cardinal area very narrow 

 and elongated, widest in front of the beaks; surface evenly sculptured by fine 

 equal, flattish radial riblets, separated by narrower grooves and crossed by 

 irregularly spaced impressed lines ; inner margin of the valves smooth or 

 slightly fluted in harmony with the ribs, especially behind ; beaks in the 

 anterior fourth ; hinge-line about two-thirds the length of the shell ; hinge 

 -anteriorly with four oblique, rather close-set teeth, separated by a wide gap 

 from the posterior teeth, which are about six in number, smaller proximally, 

 and parallel with the hinge-line. Lon. 8.3, alt. 5, diam. 4 mm. 



