Animals Before Man 



are but two species found in the United States. 

 These are small, belong to the genus Zamia, 

 and are confined to Florida. The Jurassic was 

 the period of their greatest abundance, and 

 large numbers, both of individuals and species, 

 have been obtained from localities in the Black 



Hills, while others 

 have been discov- 

 ered in Maryland. 

 The trunks only 

 have been found, 

 for the long fronds 

 could be preserved 

 only under excep- 



Fossil trunk of a cycad, Cycadoidea tionally favorable 

 megalophylla, from the Wealden circumstances. 

 Formation of England. 



Owing, however, 



to their peculiar manner of growth the trunks 

 include the leaf and flower buds, and by mak- 

 ing sections of these Mr. Wieland has secured 

 much valuable information. 



Among the more famous localities for dino- 



O 



saurs are Canon City, Colo., and Como Bluffs in 

 Wyoming, whence came many of the specimens 



174 



