Caprina Limestone Beds. 101 



discovered a fauna in wliat is now known to be the Caprina 

 limestone in the bluffs of the Colorado, a few miles west of 

 Austin. Not knowing the horizon of these beds, he sent them to 

 Dr. C. A. White, of the United States Geological Survey, and 

 Dr. Ferdinand Roemer, at Breslau. Dr. White described sev- 

 eral of the forms of aberrant Chamidse, but owing to the lack of 

 stratigraphic particulars he refrained from publishing any age 

 conclusions.* Dr. Roemer published f beautiful illustrations of 

 these fossils and described them with his accustomed skill, but 

 at that time, not knowing the comprehensive character of the 

 beds in the immediate vicinity of Austin and probably deceived 

 by the lithologic resemblance of the matrix, he erroneously con- 

 cluded that they came from the Austin chalk (Niobrara) of the 

 Upper Cretaceous. His conclusions that the Austin chalk from 

 which he supposed these fossils to have come was of Turonien 

 age was undoubtedly correct. The Austin chalk abounds in 

 many other species which justify such a conclusion, but not one 

 of these species later described warranted such a conclusion, 

 nor did they come from that horizon. The writer regrets that 

 he is unable here to republish Dr. Roemers excellent figures 

 and descriptions of this fauna. 



The following is a list of the species which I have observed 

 from the Rudistes horizon in the Caprina limestone beds at Aus- 

 tin, Texas : 



Parasmilia austinensis Roemer. 

 Pleurocora texana Roemer. 

 Pleurocora coalescens Roemer. 

 Cladophyllia furcifera Roemer. 

 Coelosmilia americana Roemer. 

 Holedypus Roemer. 

 Patella or Pileolus (?). 

 Chrysostoma. 



Helicocryptus or Adeorbis. 

 Ziziphii ius ( Ca lliostoma} . 

 Nerinea austinensis Roemer. 

 Ncriiiea cultrispira Roemer. 



* Bulletin 4, U. S. Geological Survey, on Mesozoic fossils, by C. A. White, 

 .Washington, 1884. 



f Paleontologische Abhandlungen Herausgegeben von W. Dames und 

 E. Kayser, Yierter Band. Heft 4. Ueber eine Dnrch die Haeuflgkeit 

 Hippuriten-Artiger Chamiden Aus^e/eichnete Fauna der Oberturonen 

 Kreide von Texas von Ferdinand Roemer. Mit 3 Tafeln. Berlin, 1888. 



