LIFE 529 



t.) an insignificant place, and the conifers and ferns, while not equally 



, \\cre subordinate to the angiosperms. 



Land animals. The aspect of the vertebrate life was inter- 

 -diaU' l>rt \\tvn that of the Jurassic arid Upper Cretaceous, and, so 



}?. 447. A cycadean trunk from the Black Hills, Dakota, Cycadeoidea dako- 

 Ward, Lower Cretaceous. (Ward.) 



far as it is known, has been sketched already (p. 515). Little is 

 known of other forms of terrestrial animal life, but it has been con- 

 jectured that the great development of flowering plants was con- 

 nected with the existence of abundant insect life. 



Fresh-water fauna. The molluscan fauna of the inland waters 

 had assumed a pronouncedly modern aspect, as illustrated in Fig. 



