82 PROCEEDINGS OF THE ACADEMY OF [1895. 



Localities. — Mosley's Ferry, Brazos River, Burleson Co. ; Cedar 

 Creek, Wheelock League; well at College Sta., Brazos Co.; Camp- 

 bell Creek, Robertson Co. 



Geological horizon. — Lower Claiborne Eocene. 



Type. — Texas State Museum. 



Turritella dutexata nov. sp. PI. 9, fig. 8. 



Specific characterization. — Whorls (in a complete specimen) about 

 15; all marked by two subcentral carinal lines together with one 

 small one just below and one just above the suture. 



Besides the ornamentation shown on the specimen figured, there 

 are usually about four spiral stria? on each whorl between the upper 

 carinal and subsutural line ; between the two strong carinal lines 

 there is often a faint stria; likewise one often appears just below the 

 lower carina, When fully striated this species bears a general re- 

 semblance to T. arenicola and T. arenicola var. branneri, but may 

 be distinguished at once by the persistency of the bicarinate feature 

 of the whorls to the very apex. The apical whorls of T. arenicola 

 and variety are unicarinate somewhat as in T. carinata H. C. Lea 

 (T. apita De Greg.). It will be observed that in Meyer's carefully 

 drawn figure of T. carinata H. C. Lea, in the Proc. Ac. Nat. Sci. 

 Phila., 1887, p. 54, pi. 3, fig. 1, la, two carinse are represented on 

 each whorl, but it is the upper one which predominates on the apical 

 whorls; in dutexata it is the lower. 



Localities. — Elm Creek, Lee Co. ; Taylor's well, 5 miles south- 

 east of Franklin, Robertson Co. (specimens in the U. S. Nat. Mus.)j 

 7 miles southeast of Jewett, Leon Co., (specimens in Aldrich's coll.); 

 also in a small varietal form at Orrell's Crossing, Elm Creek, Lee 

 Co.; near Baptizing Creek, Cherokee Co., Tex. Also in Louisiana 

 at southwest \, southeast } Sect, 19, R. 7 W. Tp. 19; Holstein's 

 well, 5 miles south of Gibbshmd, Bienville Parish; mouth of Saline 

 Bayou, Red River; Sect, 29, Tp. 17, R. 5 W. In Mississippi 2£ 

 miles east of Newton ; Wautubbee hill, near Enterprise. In Ala- 

 bama at Claiborne. 



Geological horizon.— Lower and Upper Claiborne Eocene. 



Type. — Singley's collection. 



Turritella nerinexa nov. sp. PI. 9, fig. 9. 



Specific characterization. — Size and general form of a fragment 



