magnifica (Pectinatella), 235. meyeni (Ephydatia), 7, 9, 17, 22, 64, ~108~. _meyeni_ (_Spongilla_), 108. _Meyenia_, 108, 113. microsclerifera (Euspongilla) (Spongilla), 53. mollis (Spongilla), 88. moniliformis (Hislopia), 204. _mon[oe]cia_ (_Hydra_), 158. _morgiana_ (_Spongilla_), 95. _mülleri_ (_Ephydatia_), 109, 243. _mülleri_ subsp. _meyeni_ (_Ephydatia_), 109. _Norodonia_, 199. oligactis (Hydra), 7, 22, 146, ~158~, 159, 245. _orientalis_ (_Hydra_), 148, 149. _ottavænsis_ (_Spongilla_), 95. _pallens_ (_Hydra_), 148. Paludicella, 187, ~192~. PALUDICELLIDÆ, 187, ~191~. Paludicellidées, 191. Paludicellides, 191. Paludicellina, 186, 187, ~190~. paulula (Spongilla), 120. _pavida_ (_Victorella_), 194, 195. Pectinatella, 188, ~235~. pectinatellophila (Dactyloccopsis), 238. Pectispongilla, 63, ~106~. pennsylvanica (Trochospongilla), 9, 22, 64, ~118~. _pennsylvanica_ (_Tubella_), 118. _pentactinella_ (_Hydra_), 149. philippinensis (Euspongilla) (Spongilla), 53. phillottiana (Trochospongilla), 4, 8, 9, 22, 64, ~117~. Phylactolæmata, 185, 188, ~206~. Plumatella, 188, 208, ~212~, 245. PLUMATELLIDÆ, 188, ~211~. Plumatellina, 188, ~206~. PLUMATELLINÆ, 188, 211, ~212~. plumosa (Dosilia), 8, 9, 22, 64, ~111~. _plumosa_ (_Ephydatia_), 111. _plumosa_ (_Meyenia_), 111. _plumosa_ (_Spongilla_), 111. pneumatica (Stratospongilla) (Spongilla), 241. _polypus_ (_Hydra_), 148, 159. Polyzoa, 183. _princeps_ (_Plumatella_), 220. _princeps_ var. _emarginata_ (_Plumatella_), 220. _princeps_ var. _fruticosa_ (_Plumatella_), 217. proliferens (Euspongilla) (Spongilla), 8, 9, 10. proliferens (Spongilla), 4, 8, 22, 63, ~72~. Proterospongia, 27. _punctata_ (_Hyalinella_), 228. punctata (Plumatella), 9, 188, ~227~. _repens_ (_Plumatella_), 217, 223. reticulata (Spongilla), 71. _rhætica_ (_Hydra_), 158. _robusta_ (_Ephydatia_), 109, 242. _robusta_ (_Meyenia_), 242. _roeselii_ (_Hydra_), 158. ryderi (Microhydra), 141. schilleriana (Sagartia), 2, 22, 140. schilleriana _subsp_. exul (Sagartia), 22. _sibirica_ (_Spongilla_), 95. _sinensis_ (_Norodonia_), 202. sinensis (Stratospongilla) (Spongilla), 53. _socialis_ (_Hydra_), 158. sowerbii (Limnocodium), 141. Spongilla, 63, ~67~, 86, 241. Spongilladæ, 65. SPONGILLIDÆ, 65. Stolella, 188, ~229~, 246. Stolonifera, 185. Stratospongilla, 63, ~100~, 241. _stricta_ (_Plumatella_), 217. subspinosa (Pectispongilla), 107. sumatrana (Stratospongilla) (Spongilla), 53. tanganyikæ (Limnocnida), 142. tanganyikæ (Plumatella), 9, 23, 188, ~225~, 246. Trachospongilla, 64, ~113~. _Trachyspongilla_, 108. travancorica (Euspongilla) (Spongilla), 9. travancorica (Spongilla), 22, 63, ~81~. _trembleyi_ (_Hydra_), 148. Tubella, 64, 113, ~120~. ultima (Spongilla), 22, 63, ~105~. ultima (Stratospongilla) (Spongilla), 9.