EXPLANATION OF PLATE LXXV1. 



POLYZOA, 



Fig. 4a. Bipora ampulla Mapl. (under surface) — x 26. 

 ,, 4b. ,, ,, (upper surface)— x '26. 



,, 5a. ,, ,, young (upper surface) — x 26. 



,, 5b. ,, ,, young (under surface) — x 26. 



