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1520 



TERTIARY FAUNA OF FLORIDA 



Lower horizon at Claiborne Bluff, Claiborne, Alabama, and in various lower 

 Claibornian localities in Texas ; Harris. 



This species is abundant though crushed in the clays at the bottom of Clai- 

 borne Bluff, and the probabilities seem in favor of its being the same as Lea's 

 species described from a fragment carrying the chondrophore from this locality. 

 Another species described from similarly inadequate material is P. complicates 

 Meyer from the Jacksonian. P. Butleriana Aldrich, of the Wood's Bluff horizon 

 in Mississippi, is not very far removed from P. Collardi. Mr. Aldrich has 

 received a chondrophore of late Oligocene age from the sands of Oak Grove, 

 Santa Rosa County, Florida. It is not suitable for naming, but the presence 

 of the genus in that horizon is worth noting. 



Periploma peralta Conrad. 



Periploma alta Conrad, Proc. Acad. Nat. Sci. Phila., xiv., pp. 572, 585, 1863; Am. Journ. 



Conch., ii., p. 70, pi. iv., fig. 10, 1866; Meek, Checkl. Miocene Fos. N. Am., p. n, 



1864 ; Whitfield, Mioc. Moll. N. J., p. 85, pi. xvi., figs. 7, 8, 1895 ; not P. alta C. B. 



Adams, as Anatina, 1852. 

 Periploma peralta Conrad, Am. Journ. Conch., iii., p. 188, 1867 ; new name for P. alta, 



preoccupied. 



Older Miocene of Shiloh, Cumberland County, New Jersey, and Cove 

 Point, Maryland. 



This large orbicular species recalls some of the recent forms now living on 

 the Panama coast and in California. It is rarely well preserved. I am at a 

 loss to understand why Professor Whitfield in this connection refers to Raeta 

 alta Conrad, a member of the Mactridce from the Tertiary of North Carolina, 

 since the two shells are not in the least alike. 



Periploma angulifera Philippi. 

 PLATE 57, FIGURE 15. 



Periploma angulifera Philippi, Zeitschrift fur Malak. for 1847, p. 73; Dall, Bull. U. S. 

 Nat. Mus. No. 37, p. 64, 1889. 



Pliocene marl of Shell Creek, near Charlotte Harbor, Florida, Willcox ; 

 living from St. Simon's Island, Georgia, south and west to the Gulf of Mexico, 

 the Florida Keys, Texas, and the coast of Honduras. 



This well-known species is marked by the very short posterior end with a 

 sharp keel ending in a projecting angle on the lower posterior border of the 

 right valve. As no good figure of it is easily available, one is supplied here. 



