4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 81 : art. 15 



Santa Margarita formation, but it is questionably referred to it 

 and is tentatively considered of late upper Miocene age. 



If the stage of evolution as to size and bulging petals attained 

 by Astrodapsis antiselli as compared with the small flat-petaled 

 astrodapses collected in the Santa Monica Mountains at the type 

 locality of HaJiotis -palaea means anything, H. lasia is considerably 

 younger than palaea^ though both are referred to the upper Miocene. 

 These two species are not at all similar to each other. 



U. S. GOVERNMENT PRINTING OFFICE; I9SJ 



