Myxobacteriaceae, Myxococciia. 843 



ssspius spiraiiter tortis, 800-2500 a. loiig., 10-25 «.. crass., flavis, ex 

 hyphis tenuissimis, 1-2 /ji. crassis, arote coalescentibus pallide mel- 

 leis eftbrmatis, longitudinaliter rugosis v. irregulariter costatis ; 

 apicibus ramulorum inerassci.to-capitatis, siBpius bilobo-bioapitatis 

 (caput 10 ^ 10) dense minute brevissimeque papillatis concolo- 

 ribus; conidiis (sporis) in apice papillarum solitarie acrogenis eo- 

 nicis V. ovatis, 16-25 « 8-18, antice plus minusve ohtuse rotun- 

 datis, postice truncato-umbilicatis ibique radiatim plicatulis, uni- 

 cellularibus, levibus, ex byaiino iiavescentibus, 



ifeft. in foliis, vaginis culmisque putrescentibus Sacchari of- 

 ficinarum, La Plata, Argentina. 



MYXOCOCCUS Thaxt. — Svll. XF, p. 460. — Baculi exiles, curvati, 

 mobiles, myxoamoeboidei, tandem in massula.s definitas, sporis coe- 

 ciformibus refertas, cyste plus rainus tectas abeuntes. 



1. Myxococcus stipitatus Thaxt. Bot. Gaz. XX ni, 1897, p. 408, 3n2 

 tab. XXXI, fig. 30-33. — Ex albo rubescens; sporarum massulis 

 initio deUquescentibus, subsph;ericis, 176 fx. diam., stipite distincto 

 obtuso fultis; baculis 2-7 ==* 0,5-0,7; sporis ovoideis 1-1,5^:^0,8-1,2. 



llab. in fimo suino aliorumque animalium, pluribus locis in 

 America boreaii. 



2. MyxQCOCCltS CiPrOSUS Thaxt. 1. c. p. 409, tab. XXXI, fig. 25-27. 3143 

 — Pallide rubeus v. incarnatus; sporarum massulis plus minus 

 elongatis, 50-100 « 20, erectis, basi leviter incrassatis, sursum te- 

 nuatis; baculis 2-5*« 0,8; sporis infiequaliter sphff^ricis 1 f*. diam. 



Hab. in fimo g a 1 1 i n a c e o in Amer. bor. 



3. Myxococcus cruentus Thaxt. I. c. p. 409, tab. XXXI, fig. 28- 3144 

 29. — Atro-sanguineus ; cystibus regulariter sphsericis, tunica plus 

 minus definita obvolutis ; baculis 8 « 3-8 ; sporis ovoideis v. irre- 

 gulariter oblongis, 1,2-1,4^0,9-1; cystibus 90-125 jx. diam. 



Hab. in fimo vaccino in Amer. bor. 



4. MyxocOCCUS macrosporus Zukal, Berichte deut. bot. Gesell. 1897, 31.10 

 p. 561, t. XXVII, f. 1-2. — Carneus v. aurantiacus, subglobosus, 

 dein guttiforrais, 1-2 mm. diam.; sporis globosis periphericis, 3 jx. 

 diam., tenui-tunicatis, strato mucoso obvolutis; bacteriosporis par- 

 tem mediam et inferiorem occupantibus, bacillaribus, 4-7 «0,1-1,5, 

 utrinque rotundatis, rectis v. curvulis. 



Ha^. in cortice udo Popuii nigrse et albas in laboratorio 

 asservato, Vindobonas. 



