14 



POLYZOA. 



Beania (Jolmst.). Base a creeping, adiiering, 

 branching thread ; cells sessile, erect, scattered, 

 with a double spinous keel on one side. 

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



Family II. G-emellariad^. 



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 ; 7t. s. and mag. 



^M'M/, 



21 22 



Family III. Caberead^. 



Caber ea (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. 



