ii6 MINUTE MARVELS OF NATURE 



Nature. For the tenants of these fantastic abodes 

 are but other kinds of zoophytes, which hold an 



Fig. 75- A very thin and minute portion of limestone, 

 sitowing lio\\- it is built up of tiny 1 \ing forms 



intermechate place between our own tiny British 

 species and those oro-anisnis which have built up 

 thousands of "coral-reef" islands in the Pacific 

 Ocean, extending in some instances hundreds of 



