XVI 



LIST OF ILLUSTRATIONS 



PAGE 



A Calcareous Leucon Sponge (Leucandra\ 535 



Development of Sycon raphanus, . . 536 



Siliceous Sponge- Spicules, . . 537 



Siliceous Spicules of Anchor-Sponges, . 540 



Sea Kidney Leather- Sponge (Chondrosia), 541 



A Single-Kayed Sponge (Axinella\ . 542 



Siliceous Spicules of Monaxonid Sponges, 542 



Esperiopsis challengeri, . . . 543 



Limestone Bored by Sponge, . . 544 



Embryo of Fresh- Water Sponge, . . 545 



Section of Common Bath- Sponge, . 546 



Ascetta primordialis, . . . 547 



Proteus Animalcule, . . . 550 



Proteus Animalcule (highly magnified), . 551 



Orange-Coloured Protomyxa, . . 553 



Young Capsuled Animalcule (Arcelld), . 553 



Egg- Shaped Gromia, . . . 554 



Hyperammina and Astrorhiza, . 555 



PAGE 



Peneroplis pertusus, > . . 556 



Structure of Orbitolite, . . . 556 



Polymorphina, .... 557 

 Shells of Globigerina, . . .557 



Polystomella, .... 558 



Sarcode Body of Polystomella, . . 559 



Green Sun-Animalcule (Acanthocysti . 560 



Lattice-Animalcule, . . . 561 



Mail-Coated Flagellata, . . . 563 



Phosphorescent Animalcule (Nodiluca\ . 563 



Pyrocystis, ..... 564 



Mussel- Animalcule (Stylonychia), . . 564 



Bell- Animalcule (Vorticella), . . 565 



Nodding Bell- Animalcule (Epistylis), . 565 



Rosel's Trumpet- Animalcule (Stentor), . 566 



Marine Animalcule (Acineta), . . 567 



Bud-Bearing Animalcule (Hemiophrya), . 568 



Spiral-Mouthed Animalcule (Spirostomum), 568 



