21 LiGNITIC StACtR 21 



Locality. — Lower bed, Woods bluff, Ala. 



"On younc^er specimens the constriclion below the suture is 

 obsolete, being replaced by a few faint revolving lines. Re- 

 sembles P. lovgifomia, >/od/s, but in some respedls differs. It is 

 much more fusiform, heavier, the body whorl much more taper- 

 ing below. The aperture gradu illy diminishes anteriorly, while 

 in the first mentioned species, and in P. gabbi Con., the canal is 

 long and slender." 



Localities. — Ala. : Woods bluff; near the mouth of Bashi creek; 



Bell's landing. 

 Type and specinic7i figiired. — Aldrich's collecflion, from Woods 



bluff.' ' 



Pleurotoma silicata. Pi. 2, %. 13. 



Syn. P. silicata Aid.. Bull. Am. Pal., vol. i, p. 60, pi. 4, fig. 3, 1895. 

 Aldrich ' s original description . — Loc. cit. 

 Locality. — Ala. : Gregg's landing. 

 Type. — Aldrich 's collecflion. 

 Specimen figured.— ^2\^or\\.. Mus. , Cornell University. 



Surcula nasuta. PI. 2, figs. 14, 15. 



Syn. P. nasuta^\v\'d.. Amen, Jr. Conch, vol, i, p. 262, 1865. 

 P. nasiita Aid.. Geol. Sm-v. Ala. Bull, i, p. 55, 18S6. 

 P. nasutaHar., Proc. Ac. Nat. Sci. Phila., 1896, p. 47S, pi. 22. fig. 7. 



Whitfield' s original description . — ' 'Shell fusiform, much elongated 

 and slender; .'pire consisting of five or six whorls; volutions con- 

 cave above, subangular in the middle, and rounded below, 

 marked on the middle by a row of longitudinally elongate nodes; 

 entire surface marked by fine, somewhat alternating, revolving 

 lines, le.ss distinct on the channel formed by the notch of the 

 aperture; .suture distincfl, bounded below by an elevated band; 

 aperture narrow, elongate, and, together with the long, straight 

 canal, forming more than one-half the length of the shell. 



Locality. — vSix miles above Claiborne, Ala., west side of the 

 river. ' ' 



This .species is extremely variable in ornamentation, ranging 

 in this respecl nearly all the wa\- from pcrsa to langdoiii. It is 



