PLATE XXII. 



'16. 



1. PLDMULAKIA PENNATULA, p. 94, of the natural size. From 



specimens presented to me by John Edward Gray, Esq. 



2. A portion of the same magnified. 



3. PLUMULARIA SETACEA, p. 97, of the natural size. 



4. Tall specimens of the same species, given to me by W. 



Thompson, Esq. 



5. A portion of Fig. 3, magnified, exhibiting the polype- 



cells and vesicles. 



