372 



TOILERS IN THE SEA. 



Flustra, or sea-mat, 310 

 Food of sponges, 130 

 Foraminifera, 28 

 Foraminifera and chalk, 55 

 Foraminifera, diffusion of, 62 

 Foraminifera, movements of, 38 

 Foraminifera of the deep sea, 51 

 Foraminifera of the past, 63 

 Foraminifera, reproduction of, 40 

 Foraminifera, shell structure, 43 

 Foraminifera, variety of form, 46 

 Forms of foraminifera, 46 

 Fossil radiolaria, 105 

 Fringing reefs, 248 



Gemmation in radiolaria, 97 

 Gemmation in sponges, 134 

 Gemmation of corals, 232 

 Gorgonidce, or sea-fans, 180 

 Growth of coral, 266 

 Growth of the polypary, 166 



Homes or skeletons, I 

 Hydra, fresh water, 151 

 Hydroid corals, 236 

 Hydroid zoophytes, 158 

 Hypotheses, to test, 288 



Isospores and anisospores, 98 



Lagoon islands or atolls, 248, 254 

 Lasso cells, or stinging cells, 223 

 Lattice workers, or polycystina, 66 

 Life history of sabella, 329 

 Limestone and corals, 240 



Medusa-forms, 160 

 Millepores, zooids of, 237 

 Minute shells in chalk, 55 

 Movements of foraminifera, 38 



New colonies of zoophytes, 1 59 



Operculum of serpula, 337 

 Operculum of zoophytes, 153 

 Organ-pipe coral, 190 



Pholas, or boring mollusc, 345 

 Phosphorescence in deep sea, 21 1 

 Phosphorescence in radiolaria, 102 

 Phosphorescence of sea-pens, 209 

 Phosphorescence of zoophytes, 169 

 Plant animals or zoophytes, 145 

 Polycystina, or lattice workers, 66 

 Polycystina, reproduction of, 84 

 Polycystina, variable forms, 71 

 Polypary, growth of, 166 

 Polyzoa, or bryozoa, 291 

 Polyzoa, reproduction of, 307 

 Polyzoa, structure of, 294 

 Polyzoon, typical, 293 

 Pressure at great depths, 13 

 Pseudopodia, or false feet, 38, 76 



Radiolaria and polycystina, 92 

 Radiolaria, circulation in, 100 

 Radiolaria, distribution of, 103 

 Radiolaria, gemmation in, 97 

 Radiolaria, genera and species, 91 

 Radiolaria, nutrition of, 99 

 Radiolaria, phosphorescence in, 102 

 Radiolaria, skeleton of, 106 

 Radiolaria, structure of, 92 

 Radiolaria, zoospores, 96 

 Rapid growth of zoophyte?, 173 

 Red coral, 196 



Reproduction in actinophrys, So 

 Reproduction in foraminifera, 40 

 Reproduction in polycystina, 84 

 Reproduction in sea anemones, 229 

 Reproduction in sea-mats, 307 

 Reproduction in sponges, 132 

 Reproduction in zoophytes, 164 

 Reproduction of red coral, 198 

 Rhizopods feeding, 81 



Sabella and serpula, 327 

 Sarcode or protoplasm, 37 

 Sarcode, what is it ? 74, 120 

 " Sarcoblasts " of Wallich, 86 

 Sea anemone, reproduction of, 229 

 Sea anemone, stinging cells, 228 

 Sea anemone structure, 219 

 Sea- fan spicules, 185 



