76 Bulletin 4 190 



PLEUROTOMELLA. 



Pletirotomella whitfieldi, PL 7, fig. 8. 



Syn. Eusus? whitfieldi Aid., Bull. Am. Pal., No. 2, 1895, p. 

 II, pi. 4, fig. 4. 



AldricK' s original description. — "Shell thin, broadly fusiform, 

 whorls ten, first four smooth, the next partly smooth and partly 

 transvers'ely ribbed, the balance angulated with ribs on the lower 

 half of whorl; surface reticulated; the spiral lines alternate in 

 size, very closely set, the smaller spiral line beaded on the body 

 whorl; constricted at suture; outer lip sigmoid, smooth within; 

 canal slightly bent. 



''Locality. — Matthews' Lvanding and Gregg's Landing, Ala. 



" This shell partakes so much of a Pleurotomid, I hesitate to 

 put it under Etisus. ' ' 



Found also i mile west of Oak Hill P. O. , from the Matthews' 

 Landing horizon, bed 9, section p. 31. 



7>;!'^.— Collection of T. H. Aldrich. 



Specimen figured. — Paleontological Museum, Cornell Univer- 

 sity. From I mi. W. of Oak Hill. 



PLEUROTOMA. 



Pleurotoma {Surcula') adeona, PI. 7, figs. 9, 10. 



Syn. P. adeona Whitfield, Am. Jr. Conch., i, 1865, p. 262. 



Whitfield' s original description. — "Shell fusiform; spire moder- 

 ately high; volutions five, deeply concave on the upper side, 

 carinate in the middle and rounded below; ornamented on the 

 carina bj' strong, oblique nodes, about fifteen on the body whorl; 

 columella long, straight, and, with the aperture, forming more 

 than half the length of the shell; entire surface marked by fine 

 revolving striae, and crossed by lines of growth having a deep 

 retral curvature on the concave portion of the volution. 



''Locality. — Nine miles below Prairie Bluff, Ala. 



This species shows considerable variation as regards carinations 

 and strength and form of spines. The figures show two forms. 

 Others are broader and more sharply carinate. 



Localities. — Alabama: Matthews' Landing; Dale's Branch, 

 near Oak Hill; i mi. W. of Oak Hill; y^ mi. W. 

 of Graveyard hill; i mi. N. of Allenton. 



Type. — Hall collection or lost. 



Specimen figured. — Paleontological Museum, Cornell Univ. 



