34 



ZOOPHYTA. 



Sub- Order II. ALGYONAEIA. 



Free, or buried by the base in mud ; 

 never attached ; feather-like 



Attached, fleshy, containing scattered 

 calcareous spiculse ; form massive, irregular. Alcyoniidce. 



Rooted, plant-like ; forming basal epi- 

 dermic secretions, and often also other 

 secretions ; the latter separable from the 

 former Gorgoniada. 



FAMILY I. PENNATULAD^E. 



Pennatula (Cuv.). Polype-mass feather-like, the 

 shaft sub-cylindrical, naked beneath ; pinnae two- 

 ranked, spreading, flattened, bearing the polypes 

 on their upper margins. 



P. phosphorea. Fig. 53 ; n. s. 



53 



Virgularia (Lamk.). Polype-mass linear, length- 

 ened, supporting, towards the upper end, sessile 

 curving lobes, embracing the stem obliquely, and 

 bearing a row of polypes on their margin. 



V. mirabilis. Fig. 54, \ n. s. ; and a few polypes, n. s. 

 Pavonaria (Cuv.). Polype-mass linear, length- 

 ened, four-sided; polypes sessile, retractile, arranged 



