ANALYTICAL INDEX. 



CHAPTER I.— FOLIACEOUS ZOOPHYTES, . . . iaue 1 



Animal products resembling foliage, . . . ib. 



In compound zoophytes each animal lives only for itself, . ib. 



No internal pith is visible, .... ib. 



The founder of each colony perishes, .... 2 



Cells are singularly fashioned, .... ib. 



Foliaceous fewer than arborescent zoophytes, . . . ib. 



They are more perishable, .... ib. 



Observations on them more difficult, .... 3 



Flustra is a miscellaneous genus, .... ib. 



§ 1. Flustra carbasea, 



Described, .... 



Its leaf as thin as paper, 



Only one side is cellular, 



Cell, form of, . 



Hydra with 22 tentacula, 



Finest specimens from the skate fishery, 



Provisions of Nature for security, 



Perpetuation, .... 



Yellow gcmmules or corpuscula in the cells, 



Their appearance and qualities, 



Animated and active, 



Become stationary, 



Hydra generated from the gemmule, 



Original cell founds the specimen, 



Subsequent cells in a different position, 



Second hydra at right angles to the first, 



Origin and rise of the leaf, 



Irregularities in the course of metamorphosis, 



Second hydra, .... 



ib. 

 ib. 



4 

 ib. 

 ib. 

 ib. 



5 

 ib. 

 ib. 



6 

 ib. 

 ib. 

 ib. 



7 

 ib. 

 ib. 

 ib. 



8 

 10 

 ib. 



