542 



HERIBAUDIA. 



HERIBAUDIA, M. PERAG., 1893. 



Fig. 291. 



Heribaudia ternaria. 



Valve disciform, circular, hyaline or finely 

 punctate, bearing on its edge three small 

 expansions or conical alae, between which 

 extends three other larger alae, rounded or 

 plicate. 



This genus comprises a single form only, H. ternaria M. Perag., which 

 has been found in a fossil state in the deposits of Pay de Dome, France. The 

 genus is imperfectly known, and only the valve face has been figured. 



