THE JOURNAL 



OF 



THE LINNEAN SOCIETY. 



Anniversary Address of the President, 

 Professor Allman, M.D., LL.D., F.R.S. 



Some Recent Additions to our Knowledge of the Structure of the 



Marine Polyzoa. 



[Read May 24, 1879.] 



In following the course which I have hitherto chosen of making 

 the address given at our Anniversary Meeting an exponent of 

 recent progress in certain departments of biological science, I 

 propose in the present instance to call your attention to some 

 additions to our knowledge of the marine Polyzoa. The short- 

 ness of the time at my disposal compels me to omit all reference 

 to the embryological researches of which these animals have of 

 late years been the subject ; the facts which I am about to bring 

 before you must therefore be confined to those of a purely struc- 

 tural character. 



I. Structure of the Endoproctal Polyzoa. 



Nitsche, several years ago, contributed some very important 

 facts on the anatomy of Pedicellina and of Loxosoma*. He 



* Sitzungsberiehte der Gessellsch. naturforsch. Freunde zu Berlin, 1S69, and 

 Zeitschr. f. wissensch. Zoolog. vol. xx. 1871. 



LINN". JOTTRN. — ZOOLOGY, VOL. XV. 1 



