io68 



FUNGI IMPERFECT! 



The red pigment-producing coccus, on the other hand, grows better and 

 shows more pigmentation on ordinary agar than on maltose or glucose agar. 



ADDENDUM. 



A few words may be inserted on certain filamentous vegetal organisms, on 

 the classification of which there is much discussion — viz., organisms of the 

 genus Leptothrix, of the genus Cladothnx , of the genus Vibriothrix. 



Genus Leptothrix Kiitzing, 1843. 



Definition. — -Filamentous fungi with long, very thin mycelial threads, with 

 no capsule or only a very delicate one; non-branching, non-septate, generally 

 non-cultivable. 



Type Species. — Leptothrix maxima Miller. 



The following species concern us: — 



Leptothrix maxima Miller, 1882. 

 Synonym. — L. huccalis maxima Miller. 



Long thin filaments, unsegmented, or with very long segments. When 

 treated with iodine and dilute sulphuric acid gives a blue granulose reaction. 

 Has not been cultivated. 



Leptothrix innominata Miller, 1882. 

 Morphologically identical with L. maxima, but when treated with iodine and 

 dilute sulphuric acid does not give a blue reaction. Has not been cultivated. 



Leptothrix racemosa Miller, 1882. 

 Filaments somewhat thicker than those found in the two preceding species. 

 On staining shows a peculiar beaded appearance. Has not been cultivated. 



Leptothrix placoides Dobrzyniecki. 

 Very long thin filaments, Gram-positive, non-motile. Gelatine liquefied. 

 Growth on agar very slow; produces very hard granular colonies. Isolated 

 from human mouth by Dobrzyniecki. 



Leptothrix filiformis Flexner, 1896. 



Synonym. — Bacillus {Leptothrix ?) pyogenes filiformis Flexner, 1896. 

 Isolated by Flexner from a rabbit. Is non-motile, of dif&cult cultivation, 

 pathogenic. 



Leptothrix vaginalis Donne, 1885. 

 Found in vagina of women and mammals. 



Genus Cladothrix Co hn, 1875. 



Definition. — -Filamentous fungi with mycelial threads very long, thin, show- 

 ing pseudo-branching. The only species concerning us is Cladothrix dichotoma 

 Cohn. 



Cladothrix dichotoma Cohn, 1875. 



Long thick mycelial threads straight or slightly undulating. They are 

 not dichotomous, as the name would suggest; it is merely a case of pseudo- 

 branching. The organism can be cultivated on ordinary laboratory media, 

 forming on agar a brownish, wrinkled, tough, membranous layer, very 

 adherent. The medium may become stained, slightly brownish. The organ- 

 ism is found often in waters. We have found it, or a very similar species, 

 in an ulcer of the foot in association with many other organisms. 



Genus Vibriothrix Castellani, 191 7. 

 The mycelial articles are motile, of very different shape: bacillary, vibrio- 

 like, spirillum-like, at times club-ended. Globular or pear-shaped bodies 



