148 The Mastigophora 



flagellate stage are the diagnostic features. In the palmella, a pectic sheath 

 may enclose the usual cellulose membrane. The suborder includes only 

 the family Gleodiniidae. The type genus is Gleodinium Klebs (132, 270; 

 Fig. 4. 24, C, D). Structure and division of the nucleus in G. montanum, 

 as noted in material from cultures (242), conform to the dinoflagellate 



Fig. 4. 24. A, B. Cystoclnnum iners Gcitler, crescent-cysts containing one 

 and two organisms, the latter showing gymnodinioid featmes; x500 approx. 

 (after Thompson). C, D. Gleodinium montanittn Klebs. showing fission in 

 palmella stage; x625 approx. (after Thompson). E. Hypnodinium spliae- 

 ricum Klebs; stigma (beneath sulcus), chromatophores, large reddish oil 

 globule; xl95 approx. (after Thompson). F, G. Dinopodiella phaseolus 

 Pascher, sessile and flagellate stages; xl250 approx. (after P.). H, I. Tetra- 

 dinium javanicum Klebs, stalked and unstalked forms; schematic (after 

 Thompson). J, K. Phytodinedria procubans Pascher, sessile and flagellate 

 stages; xl250 approx. (after P.). L. Stylodinium sphaera Pascher, x940 ap- 

 prox. (afler P.). 



