LIST OF ILLUSTRATIONS 



FIGURE PAGE 



1. Diplodinium (After Sharp) 231 



2. Hydra (After Parker and Parker) 232 



3. Stylonychia Mytilus (From Hartog, After Lang) . . .233 



4. Stenostoma Leucops (After Ott) 233 



5. Stylonychia Mytihis (After Putter) 235 



(>. Stylonychia Histrio (After Maier) 250 



7. Crithidia Leptocoridis (After McCuUoch) 251 



8. Crithidia Leptocoridis (After McCuUoch) 252 



9. Giardia Muris (After Kofoid and Christiansen) . . . 255 



10. Coryceila Armata (From Wasielewski, After Leger) . . 270 



11, 12, 13, 14. Stentor Caeruleus (After Johnson) . . . 274, 275 



15. Frontonia Leucas (After Tonniges) 327 



l(j. Naegleria Gruberi (After Kofoid) 329 



17. Spermatid of the Rat (After Duesberg) . . . . .334 



18. Spermatid of Salamander (After Heidenhain) . . . .334 



19. Spermatid of Snail (After Heidenhain) 336 



20. Flagelliim of Euglena (After Biitschli) 371 



21. Frontonia Leucas, Trichocyst (After Tonniges) . . . 374 



22. Aulosphaera (After Haecker) 376 



23. Aulosphaera Elegantissima (After Haecker). Detail of 



Structure 377 



24. Auloceros (After Haecker). Detail Section of Spine . . 377 



25. Aulacantha (After Borget) 379 



26. Acanthometron Pellucidum (After Moroflf and Stiasny) . . 381 



27. Euglypha Alveolata, Division Stages (After Minchin) . . 384 



28. Development of Pyxinia (After Leger and Dubosq) . . 387 



29. Epimerite of Pileocephalus Heerii (After Lankester) . . 388 



30. Epimerite of Geneiorhynchus Monnieri (After Lankester) . 388 



31. Epimerite of Echinomera Hispida (After Lankester) . . 388 



32. Epimerite of Beloides Firmus (After Lankester) . . . 389 



33. Epimerite of Comeloides Crinitus (After Lankester) . . 389 



34. Noctiluca Miliaris (After Hertwig) . ... . . .390 



35. Fission Stages of Noctiluca Miliaris (After Calkins) . , 39X 



XX13? 



