ANALYTICAL INDEX. 265 



CHAPTER IV. — continued. 



Metamorphosis, ..... page 193 



Adults and young different in form, . . . . ib. 



Vegetation, . . . . . . . 194 



Germinating principle a year dormant, . . . .196 



Animal and vegetable analogies, .... ib. 



Conclusions, . . . . . . .197 



Plates XXXVII., XXXVIII., explained, . . . ib 



§ 12. Serttjlaria.antennina, ..... 198 



Planulae the origin of zoophytes with muricate tentacula, ib. 



No anticipation of ultimate dimensions, . . . 199 



Multiplication follows animation, . . . . ib. 



1. Antennina, Jjohster'ahoTii, .... ib. 

 Hydra with 14 tentacula, ..... 200 

 Cell nearest the stem first prolific, .... 201 

 Embryo most distant least mature, . . . . ib. 

 Ovate vesicle — single planula, .... ib. 



2. Sertularia ( Ncmcrtesia ) ramosa, .... 202 

 Stem composed of tubuli, . . . . . 203 

 Vigorous reproductions, . . . . . ib. 

 Analogy of zoophytes to vegetables, .... ib. 

 Decay commences with extremities, . . . . ib. 

 Mode of propagation guides to character, . . . 204 

 Vesicles of S. antennina and ramosa contrasted, . . 205 

 Vesicles contain 24 or 30 planulae, . . . . 206 

 PlanulsB resemble planarioe, . . . . . ib. 

 Three different vesicles on S. ramosa, . . . 208 

 Lamouroux's specimens dried fragments, . . . ib. 

 Plates XXXIX., XL., explained, .... 209 



CHAPTER V. — Campanclaria, . . . .211 



Indelible characters should distinguish genera, . . ib. 



Genera precipitately instituted, . . . . ib. 



§1. Sertulakia (Campandlaria) dichotoma, . . 2)2 



Its luxuriance, . . . . . ib. 



Its parts originally white, . . . . . 213 



Bell falls with decay of the hydra, . . . . ib. 



Hydrae and bells regenerated, . . . . 214 



Propagation, . . . . ■ • .215 



Tintinnabulum (Medusa J generated in the vesicle, . ib. 



Progress of its evolution, . . . . .216 



VOL I. 



2l 



