323 Midway Stage 109 



Turritella alabamiensis , PI. 11, fig. 6. 



Syn. T. alabamiensis Whitf. , Am. Jr. Conch., i, 1865, p. 267. 

 T. alabamensis Aid., Geol. Surv. Ala., 1894, p. 246, pi. 

 i3> fig- 2. 

 Whitfield' s original description. — "Shell slender; volutions 

 twelve or more; subquadrangular, lower margin sometimes pro- 

 jecting; suture distinctly marked; aperture subelliptical, slightly 

 oblique; surface marked by numerous fine revolving lines, which 

 are scarcely alternate, and crossed by distinct lines of growth, 

 which make a deep sinus on the body of the volution, and are 

 again bent backwards on the lower angle. 



" This species scarcely differs from T. ccelata Conrad, from the 

 Vicksburg (Miss.) beds, except that it is destitute of the lines 

 of granules which give so decided a character to that species. 

 '"Locality. — Nine miles below Prairie Bluff, Alabama. 

 The figure given herewith is the same as that shown on plate 

 13 of Aldrich's work referred to above. It is of the same general 

 shape as the typical specimens from Matthews' lyanding, but 

 lacks the sharp spiral and longitudinal sculpturing of the latter. 

 We are inclined to regard this species as but a marked variety 

 of T. mortojii. 



Localities. — Texas: Brazos river, not far from the Cretaceous- 

 Eocene contact. 

 Arkansas: Near Olsen's switch, a few miles S. W. 



of Little Rock. 

 Alabama: Matthews' lyanding; i>^ mi. S. W. 

 of Palmer's mill; Dale's Branch; i mi. W. of Oak 

 Hill; y,, mi. W. of Graveyard hill. 

 Type. — Hall collection. 

 Turritella saffordi, PI. 11, fig. 7. 



Syn. T. safi'ordi Gabb, Jr. Ac. Nat. Sci., Pliila., vol. iv, i860, 

 p. 392, pi. 68, fig. 12. 



Gabb' s original description. — "Scalariform; whorls eight or ten, 

 somewhat carinated below, flattened on the side; suture profound; 

 mouth subquadrate; surface marked by three small revolving lines 

 on the lower portion of the whorl, near the suture, and on some 

 specimens by obscure revolving lines near [on] the whole whorl, 

 always crossed by waved lines of growth. 



''Dimensions. — Length (restored) 2.2 in., width of body whorl 

 .6 in., length of mouth .4 in. 



"'Locality. — Hardeman Co., Tenn. Prof. Safford. From the 

 light grey limestone alternating with the marls of the Ripley 

 Group. ' ' 



