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72 1 



TERTIARY FAUNA OF FLORIDA ' 



This fine and rare species is somewhat widely distributed. The variety 

 Woolviaiii, which differs from the type by its more sharply striated surface 

 and pronounced sculpture, is chiefly known from the New Jersey localities. 



Pecten (Pecten) hemicyclicus Ravenel. 

 Janira heinicyclica Ravenel, Tuomey and Holmes, Pleioc. Fos. S. Car., p. 25, pi. 8, figs. 



1-4. 1855- 

 Pecten lieinicyclus Meek, S. I. Checkl. Mioc. Fos., p. 4, 1864 (err. typ.). 



Newer Miocene of Cooper River, South Carolina, at the Grove, and on 

 Goose Creek at Smith's ; Ravenel and Holmes. 



This fine species differs from the other American forms in its size and 

 close, coarse concentric sculpture, recalling P. inaximus of Europe, but of a 

 more inflated form. 



Pecten (Pecten) Raveneli n. s. 

 Plate 29, Figure 10. 



Rare in the Pliocene of the Caloosahatchie marls, Florida, Dall; dredged, 

 with other fossils, ofif Cape Fear, North Carolina, in fifteen fathoms by the 

 United States Fish Commission. 



Shell much of the size and form of P. medius Lam., but with twenty-one 

 or twenty-two strong ribs ; dichotomous in the right valve but rounded and 

 simple in the left, with three or four finer threads on the submargins ; inter- 

 spaces on the right valve smaller than the squarish ribs, on the left subequal ; 

 right valve with subequal ears, each with three or four strong, rounded riblets; 

 notch shallow; ears of the left valve concave, two-ribbed, with less pronounced 

 sculpture ; surface of both valves covered with close-set, concentric, elevated 

 lines; interior fluted, crura moderately developed. Alt. 42, lat. 47, diam. 

 13 mm. 



This neat little species differs from P. mcdiiis in its coarser sculpture, and 

 from the young of P. luinicycliais by its more numerous ribs and details of 

 surface. 



Pecten (Euvola) Holmesii Dall. 

 /antra affinis T. and H., Pleioc. Fos. S. Car., p. 26, pi. 8, figs. 5, 6, 1855 ; not of Reuss, 



1846, nor Risso, 1826. 



Miocene of South Carolina, on Goose Creek, at Smith's. 



This fine species is only known by the author's types now in the 

 American Museum of Natural History, New York City. The name em- 

 ployed was already in use for a Cretaceous species of Europe by Reuss, and 



