1046 



MA>;UAL OF DETERMIXATIVE BACTERIOLOGY 



I. Die Polyangideu, Geb. Bonitraeger, 

 Leipzig, 1924, 86.) 



Etymology: Greek megalos, large; 

 sporos, seed, spore; large spored. 



Swarm stage (pseudoplasmodium) : Not 

 described. 



Fruiting bodies : About 80 to 160 mi- 

 crons wide, rounded, cushion-shaped, 

 dark flesh color. Spores 2 microns. 



Source and habitat : Jahn {loc. cit.) , on 

 stag dung near Berlin. 



Illustrations: Jahn {loc. cit.) Fig. Y, 

 i to k, p. 87. 



4. Chondrococcus macrosporus Krze- 



mieniewski. (Acta Soc. Bot. Poloniae, 4, 

 1926). According to Krzemienievvski, 

 not to be confused with Zukal's species, 

 Myxococcus macrosporus (Ber. d. deutsch 

 Bot. Gesellsch., 15, 1897, 542.) 



Etymology: Greek makros, long, large; 

 sporos, seed, spore; large -spored. 



Swarm stage (pseudoplasmodium) :Not 

 described. 



Fruiting bodies: Much like Chondro- 

 coccus coralloides, differing in color and 

 in size of spores. Spores 1.6 to 2.0 

 microns. Fruiting body yellow or light 

 brown color, with long branches. 



Source and habitat : Krzemieniewski 

 {loc. cit.), found it first on leaves, later 

 isolated from soil on rabbit dung. 



Illustrations: Krzemieniewski {loc. 

 cit.) PI. II, Fig. 19. 



5. Chondrococcus blasticus Beebe. 

 (Iowa State Col. Jour. Sci., 15, 1941, 310.) 



Etymology : Greek blastikos, budding. 



Fruiting body : Primary : Spherical to 

 subspherical, usually sessile but occa- 

 sionally with a short stalk or foot; pale 

 pink to bright salmon pink; 300 to 600 

 microns in diameter. No outer wall or 

 limiting membrane evident. Develops 

 on sterilized rabbit dung in from 3 to 6 

 days at room temperature. Secondary: 

 Arising as bud-like growth from the 

 primary fruiting body. Develops into 

 irregularly shaped, finger-, coral- or bud- 

 like protuberance. Seldom branched; 

 occasionally stalked but usually sessile on 



primary fruiting body until latter is 

 utilized in formation of several secondary 

 fruiting bodies. Deep pink to salmon 

 pink in color. Variable in size and shape ; 

 50 to 150 by 75 to 225 microns. No outer 

 wall or limiting membrane evident. 



Spores : Spherical, thick-walled, highly 

 retractile; 1.2 to 1.4 microns in diameter. 

 Held together in the fruiting body by 

 the mass of slime. 



Vegetative cells : Long, slender, flexible 

 rods, straight or curved to bent, ends 

 rounded to slightly tapered, Gram- 

 negative. 0.5 to 0.6 b3'3.0 to 5.0 microns. 

 Usually found in groups of 2 to 12 lying 

 parallel on the surface of the slimy 

 colony, the group moving as a unit. 

 Motile by a crawling or creeping motion, 

 no flagella. 



Vegetative colony: Thin, colorless, 

 transparent at margin ; surface broken by 

 many small ridges or veins. Center 

 smooth, slightly thicker, often showing 

 pale pink color. Fruiting bodies first 

 form at or near center, later distributed 

 irregularly on other parts of colony. 

 Margin composed of active vegetative 

 cells. 



Physiology : Good growth on mineral 

 salt agar to which has been added such 

 complex carbohydrates as dulcitol, inulin, 

 cellulose, reprecipitated cellulose or 

 starch; starch hydrolyzed, cellulose not 

 destroyed appreciably. Can utilize agar 

 as both C and N sources. Best growth on 

 suspensions of killed bacterial cells in 

 agar. Growth inhibited partially or 

 entirely by arabinose, mannose and 

 maltose. 



Source: Goat dung and soil, Ames, 

 Iowa. 



Habitat: Soil. Decomposes organic 

 matter, especially bacterial cells in 

 dung. 



Illustrations: Beebe {loc. cit.) PI. II, 

 Figs. 5-6, pi. IV, Fig. 18. 



6. Chondrococcus cerebriformis 



(Kofier) Jahn. {Myxococcus cerebri- 

 formis Kofler, Sitzber. d. kais. Akad. 

 Wiss., Wien. Math. -Nat. Klasse, 122 



