232 University of Texas Bulletin 



GASTROPODA 



TYLOSTOMA Sharpe 

 TYLOSTOMA a ff. OVATUM Sharpe 



PL 20, fig. 3 

 1849: Tylostoma ovat-um, Sharpe, On Tylostoma, p. 379, pi. 9, figs. 7, 8. 



In the upper horizon of our Salmurian numerous specimens of gastro- 

 pods have been collected; among these Tylostoma or similar genera seem 

 to predominate. The greater part consists of internal molds which are 

 badly preserved. In some specimens we note that the labrum is thick- 

 ened on the inner side, thus these individuals very probably belong to 

 Tylostoma. It is very possible that there are different species in the col- 

 lection but in consideration of the bad state of preservation of the ma- 

 terial it is impossible, to distinguish them with certainty. The best speci- 

 men, as well as some less well preserved, has much similarity with T. ova- 

 turn Sharpe. Its features are: 



Shell subglobose, of broad oval form, with a low spire of approximately 

 six coils, mouth suboval and relatively narrow, labrum having an inner 

 thickening. The surface is entirely smooth. 



According to Choffat 1 T. ovatum occurs in all the beds from the Bella- 

 sian to the upper Turonian ; it is thus not very surprising that a similar 

 form is found in our beds. 



Number of specimens : 5 and probably numerous fragments. 



Age: Lower Turonian (Salmurian), upper horizon. 



ECHINODERMATA 



HEMIASTER Desor 

 HEMIASTER sp. 



PI. 20, figs. 6-10 



In the lower marls of Cerro del Macho, Dr. Haarmann found a Hemiaster 

 which probably represents a new species. He found another specimen 

 loose below the hill which seems to belong to the same species, but it is 

 too badly preserved for determination. The features of the better pre- 

 served specimen are : 



'Choffat, Syst. cret. Portugal II, p. 190. 



