INDEX. 



197 



Plumatella rcpens, tentacles of . 150 



Polyps 44 



Polyps, changes of form . . 48 

 Hydra viridis ... 43 

 organization of polyps . . 49 

 piercing an anguillula . 52 

 poison threads . . .52 

 Polyzoa, Character of 157, 158, 189 



Protozoa 22 



Pterodina patina . . . Gl 



Rotifers, Zoological positions 



structure of gizzard 



sexes of . . . 



Bracliionus urceolaris . 



(Ecistes crystallinus . 



Euclilanis triquetra 



Floscularia ornata 

 " cornnta 



Limnias ceratophylli 



Lindia torulosa 



Melicerta ringens 



Metopidia acuminata 

 ' Monocerca rattus . 



Monostyla . 



Pliilodina . . . 



Pterodina patina 



Rotifer vulgaris 



Scaridium longicauduni 



Stephanoceros Eichornii 



Triarthra 

 Refiex actions . 



s 



Salpina 



protrusion of gizzard 

 Scaridium longicaudum 

 Stephanoceros Eichornii . 



of 35 



36,39 



35 



122 



102 



92 



73 



91 



148 



01, 102 



92, 95 



Go 



. 69 



97 



104 



01 



33 



134 



135, 138 



. 120 



109 



69 



70 



134 



135 



Stephanoceros Eichornii, cilia of 



135, 136 



crown of tentacles 



eyes . . . ^ . 



nerves 



ravenous character of . 



respiration . 



T 



Tardigrada, or Water Bears 



cast skin of used as a nursery 



curious figure and habits . 



effects of heat on . 



peculiar mouth of 



structure of gizzard 



zoological rank of 

 Trachelius . . . 

 Trachelius ovum 



branched digestive tube 



changes subsequent to tission 



lission of 

 Trachelomonads 

 Triarthra 



curved spines of 



gizzard of 

 Trichodina pediculus 



135 

 138 

 138 

 137 

 138 



172 

 177 

 173 

 175 

 174 

 174 

 176 

 55 

 179 

 179 

 182 

 181 

 119 

 120 

 121 

 121 

 . 65, 66 



120 



Vegetables, nature of . . 25 



Vibriones 85 



their relation to decomposition 

 of animal matter . . 86 



Vorticclla 19 



acineta form of . . .31 

 mode of propagation, and 



encysting process . . 29, 32 



w 



Water Bear, (sec Tardigrada) 

 Worms colouring mud 



116 



