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I ICK 

 TERTIARY FAUNA OF FLORIDA J 



Cardium (Trigoniocardia) maturense n. sp. 

 PLATE 48, FIGURE 7. 



Cardium liaitcnsc Guppy, pro partc, Geol. Mag., Dec., ii., vol. i., p. 450, 1874; Geol. Mag., 

 vol. ii., 1865, p. 256; not of Sowerby, 1849. 



" Pliocene" of Matura, Trinidad ; Guppy. 



The National Museum contains among the types of Mr. Guppy's West 

 Indian fossils some specimens of a Cardium which was identified and listed as 

 above, vinder the name of C. haitense, by Mr. Guppy. The appearance of the 

 fossils differs from any Pliocene fossils I have seen from Middle or South 

 America or the Antilles, and I should judge them, from their aspect, to be 

 of greater age. However this may be, the shell in question is undoubtedly 

 quite distinct from C. haitense and offers the following characters : 



Shell small, obovate, not carinate, short, elevated, somewhat oblique ; pos- 

 terior area with eight or nine ribs, body with twelve or thirteen ; ribs rounded, 

 low, those before the middle having a long slope anteriorly and a row of very 

 small, bead-like nodules near the summit which is close to the short slope ; 

 all the ribs have this disproportionately small nodulation ; the interspaces are 

 narrow but not channelled, at the bottom is a cross-striation in arcuate lines ; 

 beaks not elevated for this group, shell with no sharp angles anywhere. Lon. 

 6.6, alt. 9, diam. 7 mm. 



C. haitense has ten ribs on the truncation and fourteen on the body ; they 

 are narrower, much higher, and of different form from those of C. maturense; 

 the nodulation of the former species is as broad as the rib it stands on and 

 of a wholly different shape from that of the latter. 



Cardium (Trigoniocardia) apateticum n. sp. 

 PLATE 48, FIGURE 6. 



Uppermost Oligocene of the Oak Grove sands, Santa Rosa County, Florida ; 

 Burns. 



Shell small, oblique, produced behind at the hinge-line, obliquely truncate, 

 evenly rounded from in front into the base; beaks rather high, carinate be- 

 hind, and prosogyrate; truncation with nine and body with thirteen ribs, 

 low, flat, wide on the body and rapidly broadening with very narrow inter- 

 spaces squarely channelled; on the truncation the ribs, as usual, are smaller 

 and more crowded and decrease in size from within outward; the channels 

 are crossed by fine, sharp, evenly spaced elevated lamellae which have a punctate 

 appearance in the narrower interspaces ; these threads rise on the sides of the 



