TRANSACTIONS OF WAGNER 

 1494 



TERTIARY FAUNA OF FLORIDA 



Astarte (Aslitarotha) cuneiformis Conrad. 

 Astartc cuneiformis Conrad, Fos. Medial Tert., p. 42, pi. xx., fig. 9, 1840: Free. Acad. 



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

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



Sci. Phila., viii., p. 184, 1842 ; Bull. Nat'l Inst. No. 2, p. 181, 1842 ; Fos. Medial Tert., 



p. 67, pi. xxxvii., fig. 7, 1845 ; Proc. Acad. Nat. Sci. Phila., xiv., p. 578, 1863 ; Meek, 



Checkl. Inv. Fos. Miocene, p. 7, 1864. 

 ? Astarte planulata Conrad, Bull. Nat. Inst., ii., p. 187, 1842 ; Proc. Acad. Nat. Sci. Phila., 



p. 578, 1863; Meek, Checkl. Inv. Fos. Miocene, p. 7, 1864 (a nude name, nowhere 



defined) . 



Miocene of Plum Point, Maryland, upper and lower la_vers, and various 

 localities within a mile of Plum Point. 



More elongated and inequilateral than the A. per plana and with a shorter 

 lunule. The sculpture is very variable, the type has the umbones rippled and 

 the remainder of the disk smooth and rather fiat ; the variety obesa Dall is 

 thicker and more convex, with the umbones not flattened and the whole surface 

 perfectly smooth; the variety calvertensis Glenn is compressed like the type, 

 but finely concentrically striated all over. 



The Pliocene, being an epoch of relatively high sea temperature in which 

 the subtropical fauna made inroads on the territor}' previously occupied by the 

 cooler-water Miocene, has few Astartes and they are of small or deep-water 

 types. 



Astarte meridionalis Gabb. 

 Astarte meridionalis Gabb, Journ. Acad. Nat. Sci. Phila., 2d Ser., viii., p. ^76, pi. xlvii., 



fig. 78, 1881. 



Pliocene clays of Limon, Costa Rica, Gabb. 



Three millimetres long, concentrically ribbed, trigonal, and pointed behind. 



Astarte opulentora n. sp. 

 Plate 57, Figure ii. 



Pliocene clays of the Tehuantepec Railway, seventy and one hLmdred and 

 twenty-four kilometres west of Atlantic terminus ; J. W. Spencer. 



Shell small, rounded, wide and rounded behind, shorter and more pointed 

 in front ; beaks small, low, usually eroded ; lunule short, lanceolate, slightly 

 impressed ; escutcheon longer, narrow, bordered by a low keel externally ; 

 valves moderately convex, rounded below, scLtlptured with small, subequal, 

 low, concentric ribs and channels, which are less distinct near the posterior 

 margin ; hinge normal ; hinge-plate narrow, inner margins sharply crenu- 

 lated. Height lo.o, length 12.5, diameter 6.5 mm. 



