266 



ANALYTICAL INDEX. 



CHAPTER V continued. 



Its life transient, . . . . . 



Figures by Ellis and Mr Lister, . 

 Are S. dichotoma, Geniculata, Gelatinosa, different ? 

 Plate XLI. described, .... 



§ 2. Sertularia (Campanularia) verticillata, 

 Bell decays along with the hydra, 

 Hydra regenerated, . . . . , 



Vesicles, ..... 



Planulte, ..... 

 Young specimens are finest, 

 Campanularia is a character too indefinite, 

 Plate XII. figs. 1-8 explained, 



§ y. Sertdlaria (Campanularia) dumosa. 

 Hydra with from 8 to 14 tentacula, 

 HydrsB develope from vigorous pith, 

 Hydros generated by ascent and descent. 

 Plates XXVI. figs. 23-25 explained, 



§ 4. Sertularia (Campanularia) syringa, 

 Bell or cell permanent after losing the hydra, 

 Plate XII. figs. 9-10, .... 



§ 5. Sertularia arcta. 



Its position doubtful, .... 



Hydra with 8 tentacula, 



Green planulse produced from it, . . 



Matrix of the planulte. 



Metamorphosis of the planulae in 26 days, 



Plate XLII. explained. 



PAGE 217 

 ib. 

 ib. 

 ib. 



218 

 219 

 220 



ib. 



ib. 



ib. 

 221 



ib. 



ib. 



222 

 ib. 



223 

 ib. 



ib. 



ib. 

 224 



224 



ib. 



ib. 

 225 



ib. 

 226 



ib. 



ASCIDIAN ZOOPHYTES, 



Simple and complex organization. 



The Creator alone can judge of perfection, 



Ascidia resembles an inanimate mass. 



Internal organs, 



Ascidian zoophyte a convenient distinction. 



Internal structure rather presumed than provfcl. 



Dr Farre, ..... 



Dr Johnston, .... 



Ascidian zoophytes and Ascidia not identical. 



M. Savigny, M. Milne Edwards, 



ib. 

 ib. 

 ib. 

 ib. 

 228 

 229 

 ib. 

 ib. 

 230 

 ib. 



