TRANSACTIONS OF WAGNER 

 1488 



TERTIARY FAUNA OF FLORIDA 



or posterior right cardinal or both of them, the hinge frequently reversed as 

 regards the valves ; inner margins crenate when fully developed or at resting 

 stages, but at other times smooth ; formula In^L?. Type Mactra triangularis 



R. i.oio.o 



Montagu. Mactrina Brown is synonymous. 



Section Microstagon Cossmann. 



Shell small, resembling Goodallia, the hinge usually with one or both lat- 

 erals obsolete, but a small right (usually anterior) cardinal present which is 

 not found in Goodallia proper. Formula L - IOI - (herouvalense) or L - IOI - 1 



R. oioi. R. oioi.o 



(pernitidum} . Type Goodallia herouvalensis Deshayes. Eocene of Paris. 



Of the Eocene species of Astarte, A. marylandica Clark, 1896, is a pre- 

 cursor of the species like A. obruta in the Miocene. A. castanella and A. plani- 

 marginata Whitfield, 1885, are represented only by internal casts and hardly 

 recognizable. A. Aldrichiana Harris from the figures has the aspect of a Cras- 

 sinella, but I have not seen specimens. A. triangulata O. Meyer, 1896, from 

 the Red Bluff beds of Wayne County, Mississippi, is small, triangular, and 

 with a very deeply impressed lunule. Other species named by Lea belong to 

 subdivisions of the Crassatellitidce, under which reference has already been 

 made to them. 



Astarte Wagneri n. sp. 

 PLATE 57, FIGURE 20. 



Oligocene of the Oak Grove sands, at Oak Grove, Santa Rosa County, 

 Florida; Burns. 



Shell small, subtrigonal, nearly equilateral, with high, pointed, convex, 

 prosogyrate beaks overhanging a very short cordate, deeply excavated lunule ; 

 escutcheon narrow, hardly defined ; sculpture of about fifteen low, rounded, 

 concentric waves with narrower interspaces, and fine, concentric striation more 

 or less obsolete ; hinge compressed by the deep lunule, otherwise normal ; inner 

 margins smooth; muscular impressions rather small, impressed. Height 10, 

 length u, diameter 4 mm. 



The most striking characteristic of this species is the deep and very short 

 lunule. 



Astarte symmetrica Conrad. 

 Astarte symmetrica Conrad, Journ. Acad. Nat. Sci. Phila., vii., p. 134, 1834; Fos. Medial 



Tert, p. 44, pi. xxi., fig. 7, 1840; Proc. Acad. Nat. Sci. Phila., xiv., p. 578, 1863; Meek, 



Checkl. Mioc. Fos. N. Am., p. 7, 1864; Whitfield, Mio. Moll. N. Jer., p. 54, pi. viii., 



figs, i, 2, 1895. 

 Astarte arata Conrad, Fos. Medial Tert., p. 42, pi. xx., fig. 8, 1840; Proc. Acad. Nat. Sci. 



Phila., xiv., p. 577, 1863. 



