IXTKODUCTION 



Flaiiitliim, a wlii))-likc protdpl.-isniic ora:;m of loco- 

 motion of zoospores, sw.inusporcs, and motile 

 iiametes. 



(iaiiirtaiii/iiim, a ditlereiitiateci sac or vesicle which 

 produces gametes. 



(iarlaiitl xtaf/r, a i>ropliasc stage of meiosis in wliicli 

 the chromatin is aggregated as garlands at the nu- 

 clear poles. 



UrttTOcoiit. (flagella) of unequal length. 



lltilocarpic. entire th.illus tr.insformed at maturity 

 into a re]irodiictive organ. 



Ili/prrplasif, abnormal growth of tissue resulting 

 from undue cell division. 



11 fiperirophii, abnormal enlargement of an organ. 



II tipopla.li/, defective development due to insufficient 

 nourishment and consequent cessation of growth. 



Ihtmoihallic, gameto])hytic or ha])loid thalli bi- 

 sexual. 



Ileteroihallic, gametopliytic or liai)loid thalli uni- 

 sexual. 



Ilnmophi/tic, sporophytic or diploid thalli bisexual. 



Hctfrophi/tic, sporojiliytic or diploid thalli uni- 

 sexual. 



Ilaplomoiioccioitx, haploid generation bisexual = 

 luimothallic. 



Ilaplodioecious, ha])loid generation unisexual ^ 

 lieterothallic. 



Diplomonoeciotts, diploid generation bise.xual = 

 homophytic. 



Diplodioecious, diploid generation unisexual = 

 heterophytic. 



Ilaplosynoecious, haploid generation bisexual = 

 homothallic ^ haplomonoecious. 



Ilaploheteroecioiis, haploid generation unisexual =: 

 lieterothallic = diplodioecious. 



Diplosifnoecious, dililoid generation bisexual = 

 liomophytic = dijilomonoecious. 



Diploheteroecioiis, diploid generation unisexual = 

 heterophytic ^ diplodioecious. 



Ind'wchromatin, generative chromatin which is con- 

 cerned with reproduction. 



Intramatrical, witiiin the host, matrix, or substra- 

 tum. 



Isofjamy, fusion of structurally similar gametes. 



Isokont, (flagella) of equal length. 



Isomorphic, similar in shape and form but not in es- 

 sential structure. 



Kari/ofjami/, fusion of gametic nuclei. 



Meront, a uni- or multinucleate product of schizo- 

 gony. 



Planocyte, a motile cell. 



Plasmodiocarp, an irregular, sinuous, asymmetrical 

 fruiting body or si^orangium of the Myxogastres. 



Plasmodium, a naked multinucleate protoplast cajia- 

 ble of amoeboid movement. 



Plasmogamy, fusion of gametes, followed sooner or 

 later by karyogamy. 



Promitosis, a pritnitive (?) type of intranuclear mi- 

 tosis in lower organisms wliich is characterized by 

 ill-defined cliromosomes and a large constricting, 

 dividing nudeole. 



Protomilosis, .a variety of promitosis described by 

 .Viexiefl' in which no clearly defined equatorial 

 |)iate is formed. The perii)heral chromatin instead 

 is distributed in a diffuse f.ishion between the 

 polar halves of the divided karyosome. 



Psriidoplasmodiiim, a false plasmodium or aggre- 

 g.ate of amoebae which retain their individuality; 

 ch.iracteristic of the Acrasieae and l,.iby rinthulae. 



Psfiuhipodiitm, -.1 temjiorary i)roto))l.isniic extrusion 

 in .•imoebac and jilasmodia which may be retracted 

 or into wliich the whole mass may move. 



Saturn stage, equatorial ring stage of ])romitosis in 

 the Plasmodiophorales during which the nudeole 

 lies in the center of a ring of chromatin. 



Schizofiony , a jirocess of simjile or multi])!e division 

 of a schizont. 



Schizont, a naked inultiiuicleate vegetative tliallus 

 which undergoes simple or multiple division. 



Sorocarp, the fruiting structure of the Acrasieae. 



Sorus, a group of sporangia or resting spores. 



Sporangiosorus, a more or less compact sorus or ag- 

 gregate of sporangia. 



Sporangium, a sac or vesicle which produces spores 

 endogenously. 



Sporoci/st, a cyst which produces asexual spores. 



Sporogonic, relating to spore formation. 



Sporont, a thallus destined to form spores. 



Synkaryon, the zygotic nucleus following karyo- 

 gamy. 



Thallus, the vegetative body of algae and fungi, 

 without differentiation into root, stem, and leaf. 



Transitional stage, a term used by Winge to describe 

 the transition in nuclear structure between pro- 

 mitosis and meiosis in the Plasmodiophoraceae; 

 synonymous to some degree with the so-called 

 akaryote stage. 



Trophochromatin, somatic, vegetative chromatin 

 which is active in nutrition. 



Zoocyst, a cyst in Monadineae which jiroduces amoe- 

 boid or flagellate cells. 



'/.oosporangium, a s])orangium which produces zoo- 

 s])ores. 



Zygote, the product of gametic fusion. 



bibliography: introduction 



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Bor/.i, A. 1884. Klii/.oinyxa, nuovo ficomicete. Messina. 



Cadniiui, E. .T. 1931, Trans. Roy. Soc. Edinhurph .57: 93. 



Cicnkowski, L. 18();i. .lahrb. Wiss. Bot. '.i: +00. 



Cook, W. U. I. 19J(i. Trans. Brit. Mycol. .See. 11: 191). 



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Erdorintschik, X. S. 1935. Summ. Sci. Wk. Inst. PI. Pro- 

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