VlRGULARI A . 
Z. ASTEROIDA. 
181 
“ P. stirpe filiformi, rachi distiche pennata : pinnis lunatis remotis 
alternis and the habitat f< in O. Norvegico,” seems to confirm 
the reference. 
Virgularia differs from Pennatula remarkably in this that no spi- 
cula enter into the composition of its soft parts. The polypiferous 
pinnules are secund, leaving- the posterior part naked, and this is 
marked with a deep furrow extending- from one end to the other, 
dividing- the polypidom into two symmetrical halves. 
ia\ 24. 
