324 Causes and Course of Organic Evolution 



of genera, but failed to evolve higher organisms than them- 

 selves. 



In the diagram that forms Fig. 11 the phylogenetic affini- 

 ties and derivations are set forth graphically. If now, in 

 connection with the table already given (p. 305), the algae 

 be divided into a simpler and a more complex or advanced 

 group, that we may term the Archseophyceae and the Neophy- 

 ceae, we find that 221 genera and 2809 species that are fresh- 

 water, and 30 genera ^^'ith 99 species that are marine, are 

 included in the former group; while 62 genera and 1502 species 

 that are fresh-water, and 623 genera ^^th 5570 species that 

 are marine, belong to the latter. Comment on such a fact 

 is unnecessary. 



