FAMILY POLYANGIACEAE 



1027 



25, Figs. 34r-36. Zukal, Ber. d. deutsch. 

 Bot. Ges., 15, 1897, 542, PI. 27, Figs. 

 6-10. Jahn, Kryptogamenflora d. Mark 

 Brandenburg, V, Pilze I, Lief. 2, 1911, 

 199, Fig. 3. Jahn, Beitrage zur botan- 

 ischen Protistologie. I. Die Polyangiden. 

 Geb. Borntraeger, Leipzig, 1924, 77, and 

 PL II, Fig. 13. 



2. Polyangium minus Krzemieniewski. 

 (Acta Soc. Bot. Poloniae, 4, 1926, 33.) 



Etymology : Latin minor, less or small. 



Swarm stage (pseudo Plasmodium): 

 Vegetative rods 0.4 to 0.6 by 3 to 7 

 microns. 



Fruiting bodies : Cyst masses com- 

 monly cover the substrate to an area of 

 0.5 sq. mm. Cysts are spherical or 

 oval, small, 20 to 80 by 20 to 50 microns, 

 light rose in color, becoming brownish, 

 embedded in a transparent colorless 

 slime. Cyst membrane . light colored, 

 relatively thick, 0.5 to 1.0 micron, trans- 

 parent, revealing the contents. Rods in 

 cyst 0.8 to 1.0 by 1.3 to 2.0 microns. 



Source and habitat : On rabbit dung 

 sterilized and placed on soil (Poland). 

 Rather rare. Relatively slow in appear- 

 ance, only after many days. 



Illustrations : Krzemieniewski {loc. 

 cit.) PI. IV, Fig. 47-48; PI. V, Fig. 49. 



3. Polyangium luteixm Krzemieniewski. 

 (Acta Soc. Bot. Poloniae, 5, 1927, 98.) 



Etymology : Latin luteus, saffron- or 

 golden-j'ellow. 



Swarm stage (pseudo Plasmodium) :Not 

 described. 



Fruiting bodies : Golden yellow, con- 

 sisting of a few cysts surrounded by a 

 common bright yellow very thick slime 

 wall. The cysts have colorless thin 

 walls. Rods 0.7 to 0.8 by 3.8 to 5.8 

 microns. 



Source and habitat : Isolated from soil 

 on rabbit dung by Krzemieniewski 

 (1927). 



Illustration : Krzemieniewski {loc. cit.) 

 PI. V, Fig. 22,23. 



4. Polyangiimi morula Jahn. (Krypto- 

 gamenflora der Mark Brandenburg., V, 

 Pilze I, 1911, 202.) 



Etymology : Modern Latin from Greek 

 mora, mulberry. A diminutive referring 

 to shape of cysts. 



Swarm stage (pseudoplasmodium) :Not 

 described. 



Fruiting bodies: Cysts bright yellow, 

 closely packed into a mulberry-shaped 

 sorus; cysts with thick membrane (3 

 microns), often made polygonal by 

 pressure, 20 to 35 microns, bound together 

 by slime. The whole sorus is 100 to 200 

 microns broad. Rods in cysts about 3 

 microns in length. Jahn states he has 

 not studied fresh cysts. In the older 

 cysts the rods are difficult to observe. 



Source and habitat : Observed once 

 only by Jahn {loc. cit.) on rabbit dung. 



Illustration: Jahn (1924, loc. cit.) 

 PI. 2, Fig. 21. 



5. Polyangium cellulosimi Im-senecki 

 and Solntzeva.* (On aerobic cellulose- 

 decomposing bacteria. Akademiia Nauk, 

 Leningrad, Isvestiia, 1936, 1115; English 

 summary, 1168.) 



Etymology: Modern Latin cellulosum, 

 cellulose. 



Fruiting body : Rods at center of the 

 colony non-motile, forming large orange 

 aggregates. Shorter than those at mar- 

 gin: 0.7 to 0.9 by 3.4 to 5.6 microns. 

 Later a concentration of cells occurs. 

 Rods come closer together, form rounded 

 or oval aggregates from which cysts 

 become delimited. Cysts orange in 

 color, 8 to 24 microns, average 20 to 25 

 microns. In addition to bacterial cells 

 droplets of fat, 1.5 to 3.5 microns, are 

 sometimes seen within the cyst. When 

 treated with H2SO4, cysts are easily 

 broken up under the cover glass. Fruit- 

 ing bodies are composed of clumps of 

 cysts. Fruiting bodies oval or pear- 



* Translated from the original by E. V. Prostov, Iowa State College Library, Ames, 

 Iowa. 



