ANIMAL-PI.ANTS AND SEA-WEEDS 129 



The geological history of the coralline algcC 

 goes back into remote ages, like that of the 



Fig. S3. Another more delicate species with stony branches. 

 Actual size shown to the left 



zoophytes ; and, like them, these families ot lime- 

 incrusting weeds have contributed largely to our 



1 



