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TERTIARY FAUNA OF FLORIDA 



Blunter, with the patulation of the base more posterior and less enrolled 

 than P. dodona, which, also, does not attain so large a size. I have not been 

 able to find any distinctive characters between the fossils and the recent shell 

 called P. carolinensis by Miss Bush. It should not be confounded with Pando- 

 rina arenosa Moller, which is a Lyonsia. 



Pandora (Clidiophora) crassidens Conrad. 

 Pandora crassidens 'Conrad, Fos. Medial Tert, p. 2, pi. i., fig. 2, 1838; Proc. Acad. Nat. 



Sci. Phila., xiv., p. 572, 1863 ; Meek, Checkl. Miocene Fos. N. Am., p. 12, 1864. 

 Pandora crassa Conrad, Am. Journ. Conch., iii., p. 269, 1867 (lapsus}. 



Miocene of the York River, Virginia, Harris ; of the Nansemond River 

 near Suffolk, Virginia, Burns ; of the Natural Well, Duplin County, North 

 Carolina ; and of the upper bed at Alum Bluff, Calhoun County, Florida. 



This is the precursor of the P. Gouldiana Dall of Massachusetts Bay, but 

 is a larger and coarser shell, with larger teeth on the hinge and more arcuate 

 laterally. The development of the hinge in these Miocene Clidiophoras is less 

 clean-cut and distinct than in the recent type. The fossils are obviously less 

 different from Pandora s. s. than the recent shells are, and it is not always easy 

 to decide in which of the two subgenera a given species should be placed, as 

 the additional teeth are not distinct. 



Pandora (Clidiophora) trilineata Say. 



Pandora trilineata Say, Journ. Acad. Nat. Sci. Phila., ii., p. 261, 1822; American Conch., 

 pi. ii., 1830 ; Conrad in Morton, Synops. Org. Rem., App., p. 3, 1834 ; Bull. Nat. Inst., 

 ii., p. 190, 1842; Tuomey and Holmes, Pleioc. Fos. S. Car., p. 76, pi. xx., fig. 13, 



Pandora nasuta Sowerby, Sp. Conch., figs. 18, 19, 1830; Reeve, Conch. Icon., xix., Pan- 



dora, pi. iii., fig. 18, 1874. 



" Pandora tabacea Meuschen" of several authors. 



Not P. trilineata of New England writers to 1870, which is P. Gouldiana Dall. 

 Clidiophora tabacea var., Carpenter, P. Z. S., 1864, p. 597. 

 Clidiophora nasuta Carpenter, op. cit., p. 597. 

 Pandora (Clidiophora) trilineata Dall, Bull. Mus. Comp. Zool., xii., No. 6, p. 312, 1886; 



Bull. U. S. Nat. Mus. No. 37, p. 68, 1889; Proc. U. S. Nat. Mus., xxiv., p. 511, pi. 



xxxi., fig. 4, 1902. 

 Pandora (Clidiophora) iloridana (Dall MS.) olim, Bull. Mus. Comp. Zool., xii., p. 312, 



1889. 



Miocene of the Darlington district, South Carolina, Tuomey and Holmes, 

 and of Wilmington, North Carolina, Burns ; Pliocene of Mrs. Purdy's marl- 



