FREE INSTITUTE OF SCIENCE 



1489 



TERTIARY FAUNA OF FLORIDA ^ 



Miocene of Maryland, on St. Mar3''s River, and of Virginia at Petersburg 

 and three miles south of City Point on the James River. 



This is a species with rude, half-obsolete, concentric sculpture often nearly 

 smooth and of a rounded trigonal, subequilateral form. The variety arata Con- 

 rad differs only by having more elevated and pointed beaks, by which the 

 lunule and escutcheon are somewhat elongated. 



Astarte vicina Say. 

 Astarte vicina Say, Journ. Acad. Nat. Sci. Phila., iv., p. 151, pi. ix., fig. 6, 1824 ; Morton, 

 Synops. Org. Rem., App., p. 3, 1834; Conrad, Fos. Medial Tert., p. 41, 1840; Proc. 

 Acad. Nat. Sci. Phila., xiv., p. 578, 1863; Meek, Checkl. Inv. Fos. Mioc. N. Am., 

 p. 7, 1864. 



Miocene of Maryland at Plum Point and its vicinity, and of Virginia at 

 Grove Wharf on the James River. 



This species appears to be rare and for that reason seems to have been 

 misunderstood, especially as Say's figure is rather rude. He contrasted it with 

 undulata and emphasized the deep lunule. It is separated from the whole im- 

 dulata group by its unflattened umbones ; it is nearest to A. exaltata Conrad, 

 which, however, never reaches the size noted by Say for A. vicina, is more 

 rounded behind, less elongate, and with proportionately higher umbones. The 

 inner margins of A. vicina are crenate at resting-stages, but many of the speci- 

 mens have no crenations. The lunule is smooth and deeply excavated. 



Astarte exaltata Conrad. 

 Astarte exaltata Conrad, Proc. Acad. Nat. Sci. Phila., i., p. 29, 1841 ; Journ. Acad. Nat. 

 Sci. Phila., viii., p. 185, 1842 ; Fos. Medial Tert., p. 66, pi. xxxvii., fig. 6, 1845 ; Proc. 

 Acad. Nat. Sci. Phila., xiv., p. 578, 1863 ; Meek, Checkl. Inv. Fos. Miocene, p. 7, 

 1864. 



Miocene of Maryland, at Calvert Cliffs and Plum Point and vicinity ; of 

 Virginia, at various localities on the York River ; and in the phosphatized 

 Miocene limestone of the Ashley River, South Carolina; Harris, Burns, and 

 Ball. 



A small, high species, with a very much impressed lunule and pointed, 

 concentrically sculptured beaks, the concentric sculpture obsolete towards the 

 ventral margins. 



Astarte Ooheni Conrad. 

 Astarte Coheni Conrad, Fos. Medial Tert., p. 43, pi. xxi., fig. S, 1840; Proc. Acad. Nat. 



Sci. Phila., xiv., p. 578, 1863 ; Meek, Checkl. Inv. Fos. Miocene, p. 7, 1864. 



