1034 



MANUAL OF DETERMINATIVE BACTERIOLOGY 



Diagnosis : Cysts brownish orange-red, on short white stalk, like a mushroom. 

 Has appearance of a white-stalked Boletus. The rods inside stand at right angles to 

 the membrane. Upon germination the covering membrane is left colorless and with 

 an appearance of honey -comb. 



The type species is Melittangium boletus Jahn. 



1. Melittangixun boletus Jahn. (Bei- 

 trage zur botanischen Protistologie. I. 

 Die Polyangiden, Geb. Borntraeger, 

 Leipzig, 1924, 78.) 



Etymology: Latin boletus, a kind of 

 mushroom . 



Swarm stage (pseudoplasmodium) : Xo 

 description. 



Fruiting bodies : Cyst stalked, mush- 

 room-like, white when immature, then 

 yellowish-flesh colored, finally yellowish- 

 brown to nut brown, when dried more 

 reddish-brown. Larger diameter of cyst 

 about 100 microns, height 40 to 50 microns, 

 length of white stalk about 40 microns, 

 length of rods in the cyst 3 to 4 microns 



by 0.5 microns. Sometimes the cyst is 

 smaller and spherical (50 to 60 microns 

 diameter), sometimes there is fusion of 

 neighboring cysts, occasionally the stalk 

 is abortive. 



Source and habitat: Jahn {loc. cit.) 

 found this not uncommon on rabbit and 

 deer dung in the vicinity of Berlin, also 

 on deer dung from Denmark. Krzemien- 

 iewski (1927, loc. cit.) reported it as 

 common in Polish soils. 



Illustrations: Jahn {loc. cit.), PI. 2, 

 Fig. 17 and 18. Also Fig B, p. 11, C-F, 

 p. 23, 0-Q, p. 43, T-U,p. 55. Krzemien- 

 iewski, Acta Soc. Bot. Poloniae, 4, 1926, 

 1, PI. V, Fig. 55-56. 



Genus IV. Podangium Jahn. 



(Cystobacter Schroeter, in Cohn, Kryptogamenflora v. Schlesien, 3, 1, 1886, 170; 

 Jahn, Beitriige zur botan. Protistologie. I. Die Polyangiden. Geb. Borntraeger, 

 Leipzig, 1924, 80; Monocystia Enderlein, Bakterien-Cyclogenie, Berlin, 1924, 243.) 



Etymology: Greek pus, podis, foot and angion, vessel. 



Diagnosis: Cysts chestnut -brown or. red-brown, single on a more or less definite 

 white stalk. 



The type species is Podangium erectum (Schroeter) Jahn. 



Key to the species of genus Podangium. 



I. Stalk scarcely definite, cysts short, appressed, if elongate then passing over from 

 the white stem into the club-shaped cyst. Ripe cysts chestnut-brown. 



1. Podangium erectum. 

 II. Stalk well differentiated. 



A. Cysts spherical, often irregular, confluent, the white stalk short. 



2. Podangium lichenicolum . 



B. Cysts lengthened ellipsoidal, red-brov\-n, definitely differentiated from the 



white, slender stalks. 



3. Podangium gracilipes. 



1. Podangium erectum (Schroeter) 

 Jahn. {Cystobacter erectus Schroeter, in 

 Cohn, Krytogamenflora v. Schlesien, 3, 

 1, 1886, 170; Chondromyces erectxis Thax- 



zur botanischen Protistologie. I. Die 

 Polyangiden, Geb. Borntraeger, Leipzig, 

 1924, 80.) 

 Etymology: Latin erectus, erect, up- 



ter, Bot . Gaz .,23, 1897 , 407 ; Jahn , Beitriige right . 



