14 



POLYZOA. 



Beania (Johnst.). Base a creeping, adhering, 

 branching thread ; cells sessile, erect, scattered, 

 with a double spinous keel on one side. 

 B. mirabilis. Fig. 17; n.s. and mag. 



FAMILY II. GEMELLAEIAD^E. 



Gemellaria (Sav.). Cells joined back to back, 

 all the pairs facing the same way ; aperture oval, 

 oblique ; no birds'-heads. 



G. loricata. Fig. 18 ; n.s. and mag. 



Notamia (Flern.). Each pair of cells arising from 

 the next pair but one below it, by tubular pro- 

 longations; tobacco-pipe-shaped birds'-heads above 

 each pair. 



N. bursaria. Fig. 19 ; n. s. and mag. 



21 22 



FAMILY III. CABEREADJE. 



Caberea (Lamx.). Cells (in the Brit, sp.) two 

 or three rowed ; branches furnished behind with 

 many large whips, placed obliquely in two rows. 

 C. Hookeri. Fig. 20 ; n. s. and mag. 



