SYNOPTICAL ARRANGEMENT. 



91 



SYNOPTICAL ARRANGEMENT of the POLYZOA CYCLOSTOMATA. 



I. Articulatae s. radicatsc 



Cellulis distinctis 



11. Inarticulatse s. adfixse < 



Cellulis indistinctis . ; 



NOTE. The families and genera in italics contain living species. 



