28 University of Texas Bulletin. 



pair are at first parallel to the anterior pair, then bent abruptly 

 backwards and weakened till scarcely traceable. No other 

 sculpture is present on the dorsal surface. The surface of the 

 sloping and inwardly bent ventral side is almost smooth. It is 

 finely granulate only opposite and just behind the frontal. 

 Opposite the front pair of furrows is a small notch, in the 

 sharp margin separating the dorsal and ventral surfaces, from 

 which a fine, line-like furrow passes forward in a moderate curve. 

 Localities. Shoal Creek, Barton Creek, Austin, Texas. 



