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TERTIARY FAUNA OF FLORIDA 



Astarte radians Conrad, Fos. Medial Tert., p. 77, pi. xliii., fig. 13, 1845. 



Astarte flabella Conrad, Proc. Acad. Nat. Sci. Phila., Hi., p. 24, pi. i., fig. 3, 1846. 



Actinobolus (Pteromeris) abbreviata Conrad, Proc. Acad. Nat. Sci. Phila. for 1862, p. 578, 



1863. 



Actinobolus (Pteromeris) radians Conrad, loc. cit., p. 578, 1863. 

 Venericardia (Pteromeris) abbreviata Meek, Checkl. Miocene Fos. N. Am., p. 7, 1864. 

 Venericardia (Pteromeris) radians Meek, loc. cit., p. 7. 

 Venericardia obliqua Bush, Trans. Conn. Acad., vi., p. 478, 1885. 

 Venericardia (Pteromeris) perplana Dall, Proc. Acad. Nat. Sci. Phila. for 1902, p. 705, 



1903. 



Miocene of Magnolia and the Natural Well, Duplin County, North Caro- 

 lina ; Pliocene of the Waccamaw district, South Carolina, and of the Caloosa- 

 hatchie and Shell Creek, Florida; Pleistocene of south Florida; recent from 

 Cape Hatteras, North Carolina, southward to Florida and the Gulf of Mexico 

 from near low water to fifty-four fathoms. 



Variety abbreviata Conrad. 



Miocene of the York River, Virginia ; of Magnolia and the Natural Well, 

 Duplin County, North Carolina; of Darlington, South Carolina; Pliocene of 

 the Waccamaw district, South Carolina, and of Shell Creek, Florida. 



Conrad after describing the Duplin County fossil as a Cardita transferred 

 it to Astarte, and as there was an Astarte perplana already he changed the 

 specific name to radians. A year later he named recent specimens from Tampa 

 Bay Astarte flabella. A shorter, more feebly sculptured form from the York- 

 town and Duplin Miocene he named Cardita abbreviata. This is the ruling 

 form in the older beds but intergrades with typical perplana, which later gradu- 

 ally supplants it, and so far I have seen no specimens of the variety among 

 the recent shells. 



Genus CALYPTOGENA Dall. 

 Calyptogena Dall, Proc. U. S. Nat. Mus., xiv., p. 189, 1891 ; xvii., p. 713, 1895. Type C. 



pacifica Dall. 



The characteristics of this genus have been elucidated under the summary 

 of the family (p. 1410). 



Calyptogena pacifica Dall. 



Calyptogena pacifica Dall, Proc. U. S. Nat. Mus., xiv., p. 189, 1891 ; xvii., p. 713, pi- xxv., 

 figs. 4, 5, 1895. 

 Pliocene of Los Angeles, California, Cooper; recent, in Clarence Strait, 



