24 l.'niccrxifij of Texas Bulletin. 



.aperture slightly oblique, rounded anteriorly, acute poste- 

 riorly; outer lip thickened, reflected, smooth within; inner lip 

 callous, with three plaits, the upper one slightly above the mid- 

 dle of the aperture, the others well down. Surface marked 

 with about twenty-seven revolving, well defined costella, sepa- 

 rated by grooves equally as wide, and crossed by numerous 

 fine, transverse lines. 



Locality. Batron Creek, Austin, Texas. 



CEPHALOPODA. 

 TURRILITIDAE. 



Genus TURRILITES Lamarck. 



TURRILITES BRAZOENSIS Roemer. 



PI. XII, fig. 1. 



Turrilites brazoetisis Roemer, 1849. Texas, p. 415. 



Turrilites brazoensis Roemer. 1852, Die Kreide. von ,Texas, p. 37, 



Taf. 3, fig. 2. 



Turrilites brazoensis Hill, 1889, Texas Geol. Surv., Bull. No. 

 4, p. 23. 



Original description. The siie11 lar s e > sinistral, tuberculate; 

 whorls almost quadrilateral, flat outside, ornamented with four rows 

 of large tubercles; the tubercles of the uppermost row standing on 

 the obtusely rounded margin between the broad scarcely arched lateral 

 surface of the whorl and the narrow superior surface, and extending 

 themselves into plain plaits covering the superior surface; both middle 

 rows consist of large, pointed tubercles; the lowest row of tubercles, 

 composed of smaller tubercles, standing on the margin of the inner 

 surface of the whorls and covered "by the following whorl. The inner 

 surface, turned toward the axis of the conical spire, covered with 

 perpendicular plain, plaits, which correspond to the tubercles of the 

 lowest row. 



The specimens collected froom the Buda are mere fragment-. 

 However, a fairly complete specimen from the Georgetown 

 formation measures in height 20cm. ; breadth, 9cm. 



Locality. Barton Creek, Shoal Creek, Austin, Texas. 



TURRILITES ROEMERI n. sp. 



PL XII, figs. 2, 3. 

 Dimensions. Height. 36mm.; breadth, 30mm. 



