96 
SIMILARITY BETWEEN STRATA OF PANZA AND MARGARITA. 
The ostrea, astrodapsis, balanus, scutella, and pecten, were found in the same strata and 
accompanying each other ; the other fossils occupied the sandstones lying below the upper 
calcareous layers, having the comminuted shells and other points of resemblance with the beds 
containing ostrea and hinnites of Santa Margarita. The Panza beds are thicker than those of 
Santa Margarita, and more variety in the animal life contained in them. Like the latter beds, 
the Panza strata lie upon the slope of the San Jose range, and have suffered extensively from 
denudation. 
