i66 



THE FLOATING ANIMALS 



FIG. 79. EUCYRTIDIUM. (FROM LANKESTER'S " ZOOLOGY, 

 BY PERMISSION OF MESSRS. BLACK.) 



FlG. 80. ACANTHOMETRA. 



(AFTER HERTWIG.) 



FIG. 8 1. STYLOSPIRA. 

 (AFTER HERTWIG.) 



