XVI 
LIST OF ILLUSTRATIONS 
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 ( Ghondrosia ), 541 
A Single-Rayed Sponge ( Axinella ), . 542 
Siliceous Spicules of Monaxonid Sponges, 542 
Esperiopsis challengeri, . . . 543 
Limestone Bored by Sponge, . . 544 
Embryo of Fresli-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 ( Arcella ), . 553 
Egg-Shaped Gromia, . . . 554 
Hyperammina and Astrorhiza, „ . 555 
PAGE 
Peneroplis pertusus, ' . . 556 
Structure of Orbitolite, . . . 556 
Polymorphina, .... 557 
Shells of Globiyerina, . . . 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 
