518 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.51. 



Blue (or Russell) Spring branch, and about 4 miles below Bain- 

 bridge, in chert blocks; Vaughan, Cooke, and Mansfield, 1914. U. 

 S. Nat. Mus. Cat. No. 166792. 



Casts of an unidentifiable Turritella not identical with T. tampae 

 were obtained at the localities mentioned. 



CALYPTRAEA (TROCHITA) TROCHIFORMIS Lamarck. 



?Infundibulumtrochiformis Co'i^KAD,Jomn. Acad. Nat. Sci., Phila., ne'Wser.,vol. 1, 

 1848, pp. 113, 133, pi. 11, fig. 3.— Cf. Ball, Trans. Wagner Inst. Sci. Phila., 

 vol. 3, 1892, pt. 2, p. 352. 



Locality. — Station 7096, at Red Bluff, on the west bank of Flint 

 River, 7 miles above Bainbridge, Decatur County, Georgia; Vaughan, 

 Cooke, and Mansfield, 1914. U. S. Nat. Mus. Cat. No. 166793. 



Impressions of a Calyptraea, which is doubtless identical with that 

 referred to by Conrad to Lamarck's species, were found as above 

 mentioned. 



XENOPHORA CONCHYLIOPHORA Born. 



Plate 86, fig. 10. 



Trochus conchyliophorus Born, Mus. Caes. Vind. index, 1778, p. 333. 

 Xenophora laevigata Fischer de Waldheim, Tab. Syn. Zoogn., 1808, p. 113. 

 1 Trochus leprosus Morton, Syn. Org. Rem., 1834, p. 15, pi. 46, fig. 6. 

 Phorus redxisus Conrad, Proc. Acad. Nat. Sci., Phila., vol. 7, 1855, p. 262. — Wailes, 



Geol. Miss., 1854, p. 289, pi. 17, figs. 6o, 66. 

 Xenophora agglutinans Gregorio, Mon. Eoc. Ala., 1890, p. 144; not of Lamarck. 

 Xenophora humilis Dall, Trans. Wagner Inst. Sci. Phila., vol. 3, pt. 1, 1890, p. 



figs. 10, 10a; not of Conrad. 

 Xenophora conchyliophora Dall, Trans. Wagner Inst. Sci. Phila., vol. 3, pt. 2, 



182, 1892, p. 360; Bull. U. S. Nat. Mus. No. 90, 1915, p. 105, pi. 15, figs. 1, 3. 



Localities. — Station 7078, on the east bank of FUnt River, about a 

 quarter of a mile below Plale's landing, Decatur County, Georgia, 

 near the lower end of Smith's reach; Cooke and Mansfield, 1914. 

 Also at station 7079, on the east bank of Fhnt River, at Mascot 

 Point, below the mouth of Blue (or Russell) Spring branch, in chert 

 blocks; Vaughan, Cooke, and Mansfield, 1914. U. S. Nat. Mus., Cat. 

 No. 166794. 



A species of Xenophora which presents no distinguishable specific 

 characters from the recent shell described by Born from the West 

 Indies has been obtained from nearly every fossihferous horizon from 

 the Upper Cretaceous Ripley formation to the Pleistocene. If, as 

 seems probable, these shells belong to one and the same species, it is 

 one of the oldest, if not the very oldest, species of moUusk now living. 



AMPULLINA SOLIDULA Dall. 



Plate 85, fig. 9. 



Ampullina solidula Dall, Trans. Wagner Inst. Sci. Phila., vol. 3, pt. 2, 1892, p. 

 376, pi. 22, fig. 31; Bull. U. S. Nat. Mus. No. 90, 1915, p. 108, pi. 3, fig. 10. 



Localities. — Station 3295, at Blue (or Russell) Springs, 4 miles 

 south of Bainbridge, Decatur County, Georgia, on the east bank of 



