ioo8 



ASCOMYCETES AND BASIDIOMYCETES 



characteristic brick-red colour, which generally disappears after 

 'repeated transplantations. The surface growth is whitish. 



Glucose Agar. — Growth somewhat more abundant than in 

 Sabouraud's agar. Colour of the surface and submerged growth 

 white. Red pigment usually absent. 



Maltose 4 per cent. — Scanty growth, no pigment. 



Glycerine Agar. — Growth fairly abundant, no pigment. 



Agar. — Scanty growth, whitish. 



Saccharine. — Same as agar. 



Adonite. — Same as agar. 



Pathogenicity. — The fungus gives rise to a peculiar type of tinea 

 cruris (p. 2042), with very thick, elevated margins and deep-seated 

 nodules. It has pyogenic properties, and may spread to other parts 

 of the body, in addition to the inguinal regions. It is capable of 

 affecting the hair follicles. In one of our cases the fungus affected 

 the hairs of the beard, producing a typical ' kerion barbae.' 



Genus Atrichophyton Castellani and Chalmers, 1918. 



Definition. — Trichophytonese with mycelium and spores present 

 in the lesions and conidia on short stalks, but they do not attack 

 hairs. 



Type Species. — Atrichophyton alhiscicans Nieuwenhuis, IQ07. 

 Classification. — The following table will indicate the characters 

 of the species: — 



A. Has been cultivated : — . _ . 



I. Culture whitish with powdery surface — Alhiscicans. 

 II. Culture brownish mass with deep furrows — Macfadyeni. 

 III. Cultures pinkish with violet tinge — Viannai. 



B. Has not been cultivated : — 



I. Spores are numerous and of various sizes^ — Blanchardi. 

 II. Spores are few and about 4 microns in diameter — Ceylonense. 



Atrichophyton albiscicans Nieuwenhuis, 1907. 



Synonym. — Trichophyton albiscicans Nieuwenhuis, 1907. 



Discovered by Nieuwenhuis in tinea albigena. In fresh prepara- 

 tions from scrapings spores are absent; the mycelial tubes are 

 straight, occasionally showing a double contour; they are often 

 dichotomous. On Sabouraud's agar the growth is very slow, 

 whitish, with a powdery surface. 



Atrichophyton blanchardi Castellani, 1905. 



Synonym. — Trichophyton sabouraudi Castellani, 1905; T. blan- 

 chardi Castellani, 1905. 



Temporary species, as the fungus has not been grown. In fresh 

 preparations from the lesions the mycelial tubes are not, as a rule, 

 quite straight; they are often banana-shaped; do not show a 

 double contour; the mycelial segments are separated, the mycelial 



