XVI 



LIST OF ILLUSTRATIONS 



PAGE 



A Single- Rayed Sponge (Axinclla), , 3517 

 Siliceous Spicules of Monaxonid 



Sponges, . . . 3517 

 Esperiopsis challengeri, . . .3518 



Limestone Bored by Sponge, . . 3519 



Embryo of Fresh-Water Sponge, . 3520 



Section of Common Bath Sponge, . 3521 



Ascetta primordialis, . . . 3522 



Proteus Animalcule, . . . 3525 



Proteus Animalcule (highly magnified), 3526 



Orange-Colored Protomyxa, . . 3528 



Young Capsuled Animalcule (Arcella), 3528 



Egg-Shaped Gromia, . . . 3529 



Hyperammina and Asfror/n'za, . . 3530 



Peneroplis pertusus, . .' . 3531 



Structure of Orbitolites, . . . 3531 



Polymorphina, .... 3532 



PAGE 



Shells of Globigerina, . . . 3532 



Polystomella, .... 3533 



Sarcode Body of Polystomella, . . 3534 



Green Sun Animalcule (A canthocystis), . 3535 



Lattice Animalcule, . . . 3536 



Mail-Goated Flagellata, . . . 3538 

 Phosphorescent Animalcule, (Nocti- 



luca), ... . 3539 



Pyrocystis, ... . 3539 



Mussel Animalcule (Stylonyckia), . 3339 



Bell Animalcule ( Vorticella), . . 3540 



Nodding Bell Animalcule (Epistylis), . 3540 



RosePs Trumpet Animalcule (Stentor), 3541 



Marine Animalcule (Acineta), . . 3542 



Bud-Bearing Animalcule (Hemiophrya), 3543 

 Spiral-Mouthed Animalcule (Spirosto- 



mum), ..... 3544 



