Turritella manchacensis

The apical angle of this is 25 and the sutural angle is 9.  The shell is small, stout, the body whorl unknown.  The whorls are slightly convex, suture is well marked, the height of the whorl is half of the width, and the surface of the whorl is marked with five square nodular ribs.  The anterior rib is the largest and behind it is the smallest, and fine striations are found between the ribs.  This specimen was found in the lower beds of the Buda limestone, first creek south of Manchaca, Texas.