EXPLANATION OF PLATE LXXV. 



POLYZOA. 



Fig. la. B'qtora biarmata, Mapl. — x 50. 



ll>. ,, ,, (thyrostome and avicularia) x 110. 



,, 2 1. ,, multiarmata, Mapl. — x 50. 

 ,, 2b. ,. ,, (thyrostome and avicularia) x 110. 



,, 3a. Portion of Bipora magniarmata, Map], — x 50. 

 ,, 3b. ,, ,, ,, (thyrostome and avicularia) x 110. 



