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1515 



TERTIARY FAUNA OF FLORIDA 



the whole length from the anterior end, small, pointed, recurved above a small, 

 impressed but not circumscribed, lunular area; posterior dorsal slope straight, 

 base gently arcuate, the posterior end pointed, with a ver}' short terminal trun- 

 cation ; surface concentrically striate, finely granulosa, with four faint, dis- 

 tant, radial threads on the posterior part of the left valve and a shallow sulca- 

 tion just below the dorsal border extending from the umbo to the posterior end 

 of the shell ; hinge normal, margins entire, interior slightly pearly, the pallial 

 sinus attaining the posterior third of the shell. Length 7, height 3, diameter 

 2 mm. 



Two valves, one much smaller than the other, the left valve apparently 

 adult, were obtained from the marl. While the posterior end is not absolutely 

 pointed, it is so nearly so as to justify the name given to the species, which is 

 much more acute than any hitherto recorded. 



Family PANDORIDyE. 



Genus PANDORA Hwass. 

 <^Pandora Hwass, in Chemnitz, Conchyl. Cab., xi., p. 211, 1795; first species Tellina. 



inaquivalvis Linne. 

 := Pandora Bruguiere, Encyc. Meth., livr. ii., pi. ccl., 1797; Lamarck, Prodrome, p. 88, 



1799; Schumacher, Essai, pp. 39, 114. 1817; Carpenter, P. Z. S., 1864, p. 201. 

 Calopodiiim Bohen, Mus. Bolten, ist ed., p. 166, 1798; 2d ed., p. 116, 1819. Tellina 



incequivalvis Linne. 

 Pandorina Scacchi, Cat. Conchyl., p. 6, 1836; not of Detken's reprint, 1857; nor of 



Bory St. Vincent, 1824. 

 Trutina Brown, 111. Conch. Gt. Brit., e.xpl. pi. xiii., fig. 5, 1827; 2d ed., p. 104, pi. xlvii., 



figs. 5, 12, 13, 1844. 

 ^Kemierlia Carpenter, P. Z. S., 1864, p. 602, type K. filosa Cpr., loc. cit.; Proc. Acad. 



Nat. Sci. Phila. for 1865, p. 55. 

 ^Clidiophora Carpenter, P. Z. S., 1855, p. 228, type C. claviculata Cpr., loc. cit.; P. Z. S., 



1864, p. 596. 

 ^Coelodon Carpenter, P. Z. S., 1864, p. 599. Type Pandora ceylanica Sowerby. 

 Not Pandora Megerle, 1811; ^Pectcn Muller s. s. 

 Pandor^lla Conrad, Proc. Acad. Nat. Sci. for 1862, xiv., p. 572, 1863; Am. Journ. Conch., 



iii., p. 269, 1867, olim. 



The first mention of this genus is by Chemnitz, who explains that Hwass 

 had erected Tellina inccqiiivalvis L. into a genus with some other Linnean 

 Tellinas. In the original catalogue of Scacchi following the name of Pan- 

 dorina coruscans, otherwise nude, is the synonym Tellina incequivalvis L., 

 which (though it is probably a typographic misplacement) is not corrected or 



