EUTHALLEPHYTA—EUMYCETES— MOULD 201 



.Fig. 44. Mucor racetnosus. Frag- 

 ment of mycelium, which has under- 

 gone conversion into chains of oidia 

 X 120. After Brefeld. 



Fig. 45. Mould. Mucor race- 

 tnosus. 1. Branched sporophore or 

 conidiophore x 80. 2. Optical sec- 

 tion of sporangium x 300. After 

 Brefeld. 



Pathogenic properties. Said to be pathogenic for various birds but Pierre 

 Savoure, after some extensive experiments thinks that it plays no part in 

 disease. It was not pathogenic for rabbits and guinea pigs. Bollinger states 

 that it occurs in the respiratory tract of birds where it produces mucormy- 

 t:osis. It has been observed in cutaneous lesions in cavalry horses in France, 

 although culture did not yield this fungus but yielded a trichophyte instead. 



Mucor ramosns, Lindt. 



Mycelium spreading in the substratum, small, branched, at first white then 

 becoming grayish-white ; sporangia black, spherical with marginal spines 60-80 ij. 

 in diameter; columella ovate, light brown, SO f- wide; spores somewhat spheri- 

 cal, 3-3.5 M in diameter, colorless. 



Distribution and Habitat. Found in Europe, not abundant. 



Pathogenic properties. Pathogenic for birds. Grows only at a temperature 

 of blood, minimum 20-25° C, maximum 50-58°, optimum 45°. 



Mucor ramosus, Lindt 



Mycelium branching, abundant in the substratum and superficial conid- 

 iophores 5-lS li wide; sporangia blackish, membrane but slightly colored, 70 a* 

 in diameter; columella rounded at the end or blunt; spores colorless, with 

 delicate membrane, smooth, 3 to 4 m x 5-6 i^. This resembles M. corymbifer 

 ■except in the character of the spores. 



Pathogenic properties. Pathogenic for guinea pigs, death occurring in 30 to 

 •36 hours. 



