225 Midway Stage hi 



T. cathedralis var. belli/era De Greg., Mon. Faun. Eoc. 

 Ala., 1890, p. 127, pi. II, figs. 17 & 38. 



Conrad' s original description. — "Shell turrited, subulate; whorls 

 with fine regular revolving striae; an obtuse slight elevation on 

 the summit, a shallow groove at base of each. 



" From the Eocene of Piscataway, Maryland." 



Though this species is most typically represented in the Lignitic 

 of Alabama, Virginia and Maryland, it occurs very abundantly 

 in nearly all horizons of the Midway and displays a remarkable 

 variety of forms. 



Fig. 10 is of doubtful reference to this species and is the figure 

 termed by Aldrich T. hiunerosa var. multilira, Geol. Surv. Ala., 

 1894, p. 246, pi. 13, fig. 3. Fig. II is more nearly typical 

 huvierosa, it is also after Aldrich. Fig. 12 is a large form be- 

 longing to the U. S. National Museum, marked " No. 204, 

 Prairie Creek." It is doubtless from near Oak Hill, bed 9 of 

 section p. 31. Fig. 13 is a very strongly lirate variety from 

 Horn hill, Eimestone Co., Tex. 



Localities (Midway). — Texas: Horn hill; Tehuacana. 



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



of Little Rock. 

 Alabama: Matthews' Landing; 2 mi. N. of Snow 



Hill; 1/3 mi. N. E. of Clayton. 



Tzirritella nerinexa, PI. 11, fig. 14. 



Syn. T. nerinexa Harris, Proc. Ac. Nat. Sci., Phila. , 1895, 

 p. 82, pi. 9, fig. 9. 



Harris' original description. — "Size and general form of a 

 fragment (the only known specimen) as indicated by the figure; 

 number of whorls unknown, ornamented by (i) fine, even, spiral 

 striae, (2) a subsutural row of pustules or crenules, and (3) a 

 slightly raised or faint ridge at the base of each whorl becoming 

 obsolete in the lower whorls, but increasing in strength above so 

 as to nearly equal in size the subsutural line of crenules. 



''Locality. — Black Bluff, Brazos river, extreme northern limit 

 of Milam Co., Milam Bluff of Penrose's Report. 



''Geological horizon. — Midway Eocene. 



"Type. — Texas State Museum." 



This species has much in common with Nerin/za buarquiana 

 White from the Midway of Maria Farinha. A large specimen 

 of a similar species was found in Eastern Brazil. 



Locality. — Alabama: Yz mi. N. W. of Prairie Bluff. 



