LIST OF ILLUSTRATIONS 



PAGE 



1. Diplodiniurn (After Sharp) ........ 231 



.-.'. Hydra (After Parker and Parker) ...... 232 



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



i. Stenostoina Lcucops (After Ott) ...... 233 



5. Stylonychia Mytilus (After Putter) ...... 235 



6. Stylonychia Histrio (After Maier) ...... 250 



7. Crithidia Leptocoridis (After McCulhx-h) ..... 251 

 H. Crithidia Le])toeoridi.s (After MeCulloch) ..... 252 

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



10. Coryeella Annata (From Wasielewski, After Leger) . . 270 



11, I.', 13, 11. Stentor Caeruleus (After Johnson) . . . 274,275 

 15. Frontonia I.eueas (After Tonniges) ...... 3:27 



Hi. Xaejrleria Gruberi (After Kofoid) ...... 329 



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



18. Spermatid of Salamander (After Heidenhain) .... 33 1 



19. Spermatid of Snail (After Heidenhain) ..... 336 

 Flajrellvm of Fimlena (After Biitschli) ..... 371 



?1. Frontonia I.eueas, Triehoevst (After Tonniges) . . . 374 



Aulosphaera (After Haeeker) ....... 376 



Aulosphacra Klegantissima (After Haeeker). Detail of 



Structure ........... 377 



Anloceros (After Haeeker). Detail Section of Spine . . 377 



Aulacantha (After Hornet) ........ 379 



Aeanthometron Pellueidum (After Moroff and Stiasny) . . 381 



Kuglypha Alveolata, Division Stages (After Minehin) . . 384 



Development of Pyxinia (After Ix'ger and Duhosq) . . 387 



Fj)imeritc of Pileocephalus Ileerii (After Lankestcr) . . 388 



30. Epimerite of Geneiorbynelms Monnieri (After I>ankester) . 388 



31. Fpimerite of Eehinomera Hispida (After Lankester) . . 388 

 3.->. Fpimerite of Beloides Firmus (After Lankester) . . .389 

 W. Fpimerite of Comeloides Crinitus (After Lankester) . . 389 



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



35. Fission Stages of Noctiluca Miliaris (After Calkins) . . 391 



XXJX 



