VESICULAEIAD^. 



19 



Polyzoary plant-like, creeping, adherent, 

 sending up at iiTegular intervals free, erect, 

 stalked polypes, without distinct cells . . PediceUinad(B. 



Family I. Alcyonidiad^. 



Alcyonidium (Lamx.). Erect, lobed, or simple ; 

 cells immersed, five-angled. 



A. gelatinosum. A. parasiticum. 



hirsutum. Fig. 30 ; n. s. and ma^. 



Cycloum (Hassall). Encrusting, covered with 

 imperforate warts ; eggs in circular clusters. 



C. papillosum. Fig. 31 ; n.s. and mag. 



I' ; > 





32 



33 



Zi 



Sarcocliitum (Hass.). Encrusting, covered with 

 perforate prominences, in which the cells are im- 

 mersed ; eggs scattered singly throughout. 



S. polyoum. Fig. 32 ; n. s. and mag. 



Family II. Yesiculariad^. 



AmatJiia (Lamx.). Shoot slender, thread-like, 

 erect, branched ; cells tubular, mutually adherent, 



c2 



