Vol. VII] WARINGSTRATICRAPHIC AND FAUNAL RELATIONS 99 



Sinum obliquum (Gabb) 



Naticina obliqiia Gabb, Pal. Gal., vol. 1, p. 109, pi. 21, fig. 

 112, 1864. 



Shell medium-size, auriform; spire slightly prominent, 

 whorls four, rapidly increasing in size ; suture faintly canalicu- 

 late ; surface marked by numerous compound revolving lines, 

 minutely waved laterally and showing a tendency to an alterna- 

 tion of larger and smaller ones ; these are crossed by irregular 

 lines of growth, which completely encircle the whorls, and are 

 most distinct and crowded in the umbilicus ; aperture patulous, 

 acute behind ; inner lip slightly thickened, and forming a small 

 incrustation on the preceding whorl; umbilicus moderate in 

 size. Locality 8, L. S. J. U. Pal. Coll. 



Tornatina evoluta, new species 

 PI. 15, Fig. 8 



Form cylindrical, whorls four, rapidly increasing in height; 

 spire low, suture excavated; aperture narrow, widening and 

 produced below; lips simple; shell thin and marked by fine 

 lines of growth. Locality 8, L. S. J. U. Pal. Coll. 



Turritella andersoni, Dickerson 

 PI. 15, Fig. 18 



T. andersoni Dickerson, Bull. Dept. Geol. Univ. Gal, vol. 9, 

 p. 501, pi. 42, 1916. 



Shell turreted. apical angle small ; whorls slightly concave, 

 straight or slightly convex above, somewhat angulated and 

 obliquely truncated below ; suture linear ; surface marked by fine 

 spiral linear ribs. Locality 8, L. S. J. U. Pal. Coll. 



Turritella infragranulata Gabb 

 PI. 15, Fig. 20 



T. infragranulata Gabb, Pal. Cal., vol. 1, p. 212, pi. 32, fig. 

 279, 1864. 



Not T. infragranulata (Gabb) Stanton, U. S. G. S.. 17th 

 An. Kept, pt. 1, p. 1044, pi. 66, fig. 3. 



