LIST OF ILLUSTRATIONS 



FIG 



1. 



o 



3. 

 4. 

 5. 

 C). 



7. 



8. 



9. 



10. 



11, 

 15. 

 16. 

 17. 

 18. 

 19. 

 ^0. 

 21. 



22 



24. 



25. 

 26. 



27. 

 28. 



30. 

 31. 

 32. 

 33. 

 34. 

 35. 



URE 



Diplodinium (After Sliarj)) ..... 

 Hydra (After Parker and Parker) . 

 Stylonychia Mytilus (From Hartog-, After Lang) 

 Stenostoma Leucops (After Ott) 

 Stylonychia Mytilus (After Putter) . 

 Stylonychia Histrio (After Maier) 

 Crithidia Leptocoridis (After McCulloch) . 

 Crithidia Leptocoridis (After McCulloch) . 

 Giardia Muris (After Kofoid and Christiansen) 

 Corycella Armata (From Wasielewski, After Lcger) 

 12, 13, 14. Stentor Caeruleus (After Johnson) . 

 Frontonia Leucas (After Tonniges) . 

 Xaegleria Gruberi (After Kofoid) 

 Spermatid of the Rat (After Duesberg) . 

 Sjiermatid of Salamander (After Heidenhain) . 

 Spermatid of Snail (After Heidenhain) . 

 Flagellinn of Euglena (After Biitschli) 

 Frontonia Leucas, Trichocyst (After Tonniges) 

 Aulosphaera (After Haecker) .... 

 Aulosphaera Elegantissima (After Haecker). Detail 



Structure 



Auloceros (After Haecker). Detail Section of Spine 



Aulacantha (After Borget) 



Acanthometron Pellucidum (After Moroff and Stiasny) 

 Euglypha Alveolata, Division Stages (After Minchin) 

 Development of Pyxinia (After I>cger and Dubosq) 

 Epimerite of Pileocephalus Heerii (After Lankestcr) 

 Epimerite of Geneiorhynchus Monnieri (After Lankester) 

 Epimerite of Echinomera Hispida (After Lankester) 

 Epimerite of Beloides Firmus (After Lankestcr) . 

 Epimerite of Comeloides Crinitus (After Lankester) 

 Noctiluca Miliaris (After Hertwig) .... 

 Fission Stages of Noctiluca Miliaris (After Calkins) 



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