170] 



The Classification of Lower Organisms 



Fig. 32. — Hypermastigina : a-d, Trichonympha Campanula after Kofoid & 

 Swezy (1919); a, cell x 250; b, division of centroblcpharoplast and formation of 

 paradesmose, and c and d, earlier and later stages of mitosis x 500. e, f, g, Sperm, 

 egg, and fertilization of Trichonympha sp. from the roach Cryptocercus after Cleve- 

 land (1948). h, Hoplonympha Natator x 250 after Light (1926). i, Staurojoenina 

 assimilis x 250 after Kirby (1926). j, Tcratonympha mirabilis after Koidzumi 

 (1921). 



