310 ANALYTICAL INDEX. 



CHAPTER VI.— continued. 



Hydras decaying September 24, . . • page 132 



Plumatclla reptans ? . . ■ • .133 



Hydra with 45 tentaeula, .... ib. 



Distinctions of lunate zoophytes, . . • 134 



Abstract of their history, . . . . 135 



Analogies and discrepancies, ..... ib. 



Plates XXXI., XXXII., XXXIII., explained, . . 136 



CHAPTER VII.— Ascidia, 138 



Of coarse and inanimate appearance, ... ib. 



Interior complex and interesting, . . • .130 



Invested by an integument, .... ib. 



Ascidia not properly a zoophyte, . . . ib. 



Food, .....-• ib- 



Clarifies muddy solutions, . . • • .140 



Probably lives very long, .... ib. 



M. Savigny, Mr Milne Edwards, . . ■ . ib. 



§ 1. Ascidia villosa, Plate XXXIV. figs. 1, 2, 3, . 141 



It is not affixed, ...••• 1D 



Rare, ....••• 



142 



§ 2. Ascidia intestinalis, figs. 4, 5, . . • • ib- 



Easily injured, ...••• ,D - 



Affixed within shells, ..... ib. 



Common, . • ■ ■ • • 143 



§ 3. Ascidia rustica, Plates XXXIV., XXXV., XXXVI., . ib. 



Transparent in early stages, .... ib. 



Circulation, . ■ • • • • .144 



Dwells in numerous societies, .... «>. 



Brood in great proportion, ..... ib. 



145 

 § 4. Ascidia scabra, • • • 



Ascidian genus denominated Tunicata, 



§ 5. Ascidia mentula, • 



Described, Plate XXXVI. figs. 5, 6 ; Plate LVI. 



Dr Duguid of Kirkwall, Orkney, 



14? 

 Adhesion of Ascidue, ..•■•• 



ib. 

 ib. 

 ib. 



