N0.21G2. FLINT RIVER OLIOOCENE FOSSILS— DALE. 515 



CERITHIUM EUTEXTILE, new species. 



Plate 87, fig. 7. 



Shell elongate, slender, thin, of about 10 flattened whorls; suture 

 distinct but shallow, not channeled; earlier whorls with (about 24) 

 narrow, low equidistant axial ribs extending straightly from suture to 

 suture, and crossed by six or seven fine, equal and equidistant spiral 

 cords, with occasional finer threads in the interspaces, forming an even 

 and finely reticulate surface ; the axial sculpture becomes obsolete about 

 the middle of the spire, the spirals become more numerous until, on 

 the last whorl, there are some 25 subequal, sometimes sharp, revolv- 

 ing threads; base slightly rounded, canal short; length of decollate 

 shell as figured, 39; of last whorl, 14; diameter at decollation, 3; at 

 base, 12 mm. 



Locality. — Station 3381, at base of bluff at Little Horseshoe bend, 4 

 miles below Bainbridge and just below the mouth of Blue (or Russell) 

 Spring branch, Flint River, Decatur County, Georgia; T, W. 

 Vaughan, 1900. U. S. Nat. Mus. Cat. No. 166737. 



This is a very characteristic species and can not fail to be recog- 

 nized when better material is available. 



CERITHIUM VAGINATUM, new species. 



Plate 87, figs. 1, 2, 3. 



Shell about 25 mm. long, acute, slender, with 9 or 10 evenly rounded 

 whorls, suture distinct, not channeled; early whorls with three un- 

 dulate spu'al cords, with subequal interspaces, between the sutures; 

 the undulations appear to be the result of the cords overriding faint 

 axial ribs, but the ribs are indicated chiefly by the undulations and 

 are absent from the later whorls; there are also fine spiral threads 

 covering the entire surface, and occasional rounded varices irregularly 

 distributed and more numerous on the earlier whorls. On the last whorl 

 the posterior cord alone is imdulated; the others are of a squarish 

 form, with slightly narrower, deeply channeled interspaces ; in addi- 

 tion to the three major cords there are two or three smaller ones, one 

 at the edge of the base and the others in front of it, with a finer thread 

 between and near the short twisted canal; aperture only slightly 

 expanded, most of it defective in the specimens; length of specimen 

 (fig. 1 ), 22 ; diameter at decollation, 4 ; diameter of last whorl, 1 1 mm. 



Locality. — Station 7075, on the east bank of Flint River, about 

 lOJ miles below Bainbridge, and just above Lambert Island; Cooke 

 and Mansfield, 1914. U. S. Nat. Mus. Cat. No. 166738. 



This species belongs to the group of C. georgianwn Lyell and 

 Sowerby, but differs from that species by its smaller size and less 

 arcuate axial ribs. 



