Fauna of the Buda Limestone 
25 
Description . — Shell turriculate, conical, sinistral; angle 49°; 
volutions angular in front, convex behind, overlapping; suture 
deep; surface ornamented with four rows of unequal tubercles; 
the anterior row with about thirty-two tubercles, placed on the 
sutural angle at the outer end of ribs which converge toward 
the umbilicus; a second row of narrow more elongate tubercles 
is placed parallel to and behind the first row. It has the same 
number of tubercles as the first. Below the second, is a third 
row of elongate tubercles, of the same number as those in the 
other rows. The fourth row consists of large, rounded tubercles 
placed in the middle of the volution, and numbering about 
eleven. 
This species differs from T. tuberculatus Bose, by the spiral 
angle and the shape of the tubercles; from T. gravesianus 
d’Orbiny, by the more elongate form of tubercle and the angle. 
In this species, the three rows of smaller tubercles are covered 
by the overlapping of the adjacent whorl, whereas in T-. tubercu- 
latus and T. gravesianus only one row is overlapped. It ap- 
pears to be rare in the Buda, only one specimen having been 
found. 
Locality . — Shoal Creek. Austin, Texas. 
