RHIZOMUCOR PARASITICUS 



975 



Genus Rhizomucor Lucet and Costantin, 1900. 

 Rhizoids generally present, columella of ovoid shape. 



Rhizomucor parasiticus Lucet and Costantin, 1900. 



Mycelium at first greyish, later brownish. Sporangium globular, 

 35 to 80 Hyphae carrying sporangia are often ramified, and are 

 between i and 2 centimetres in length. They are often provided 

 at their basal portion with rhizoids. 



Fig. 481. — Lichtheimia corym- Fig. 482. — Rhizomucor parasiti- 



hifeva Vuillemin. cus Lucet and Costantin. 



(After Lichtheim.) (After Lucet and Costantin.) 



The columella is ovoid or pyriform; dark brownish; spores 

 ovoid; longitudinal diameter, 4 transverse diameter, 2-5 ^. 



R. parasiticus is pathogenic for guinea-pigs and rabbits. It was 

 found in the expectoration of a woman by Lucet, Costantin, and 

 Lambry. The patient had been considered at first to be suffering 

 from tuberculosis She recovered under a potassium iodide and 

 arsenical treatment. 



Rhizomucor septatus von Bezold, 1889. 



Synonyms. — Mucor septatus von Bezold; Rhizomucor septatus 

 Lucet and Costantin, 1889. 



Rhizoids present ; sporangia of a brownish-greyish colour, spheri- 

 cal, with a smooth, or occasionally slightly moriform surface; 

 diameter about 30 to 35 [jl: columella spherical, brownish; spores 

 roundish or slightly oval, from 2-5 to 4 ^. 



The spores are of a yellowish or brownish colour; spherical or 

 ovoid, with a smooth surface. 



This species was found by Siebenmann in a case of otomycosis. 



Genus Rhizopus Ehrenberg, 1820. 



Rhizoids present ; columella hemispheric ; mushroom-like. 

 This genus contains only one species. 



Rhizopus niger Ciaghnski and Hewelke, 1893, 

 Synonym. — Mu.cor niger Ciaglinski and Hewelke, 1893. 

 The mycelial filaments are provided with abundant rhizoids 



