gg'i ASCOMYCETES AND BASIDIOMYCETES 



1. T tonsurans Malmsten, 1845. 



2. T. sabouraudi R. Blanchard, 1895. 



3. T. violaceum Bodin, 1902. 



4. T. sulphur eum C. Fox, 1908. 



5. T. glahrum Sabouraud, 1909. 



6. T. fumatum Sabouraud, 1909. 



7. T. effractum Sabouraud, 1909. 



8. T. circonvolutum Sabouraud, 1909. 



9. T. regulare Sabouraud, 1909. 



10. T. umhilicatum Sabouraud, 1909. 



11. T. exsiccatum Uriburu, 1909 



12. T. polygonum Uriburu, 1909. 



13. T, soudanense Joyeux, 1912. 



14. T. currii Chalmers and Marshall, 1914. 



These may be recognized as follows: — 



A. Condition of mycelium in hair not definitely stated, but probably that of 



the Crateriform subdivision (see below). 



(1) In cultures very convoluted — Circonvolutum. 



B. Condition of mycelium in hair definitely stated. 



I. Mycelium in hair resistant to caustic potash, segments characteristi- 

 cally quadrangular in shape, with double contour, 4 to 6 in 

 breadth, arranged in fairly straight ladder-like rows — Crateriform 

 subdivision. 



(a) Cultures coloured and with craters : Tonsurans group : — 



(2) Yellow in centre, white at periphery — Tonsurans. 



(3) As 'tonsurans,' but, when old, cracked and dry — Effractum. 



(4) Orange-red centre, remainder sulphur coloured — Sulphureitm. 



(5) Golden-yellow convoluted centre, becoming crateriform 



later — Soudanense. 



(6) When old of a yellowish-brown colour — Fumatum. 

 {b) Cultures white with craters : Umbilicatum group : — 



(7) Deeply umbilicated with aureola — Umbilicatum. 



(8) Slow growth, surface cracked with dry appearance — Exsic- 



catum. 



(9) Growth at first roundish and then polygonal — Polygonum. 

 (c) Cultures white with knob-like centre : Currii grottp : — 



(10) Does not form duvet — Currii. 



II. Mycelium in hair not resistant to caustic potash; segments rounded, 

 4*7 /J, in diameter, not arranged as a rule in rows, but if a row is 

 visible it resembles a string of beads and not a ladder — Acuminate 

 subdivision. 



[a) W ithout acuminate centre : Violaceum group : — 



(11) Primary growth violet: — 



(a.) Most strains do not melt gelatine very rapidly: — 



(i.) Ordinary amount of scaling on the head — Viola- 

 ceum. 



(ii.) Enormous numbers of scales, followed at times by 

 permanent baldness — Var. decalvans. 

 (b) Melts strong gelatine very rapidly, beginning as soon as 

 growth appears — Var. khartoUmense. 



(12) Primary growth white- — Glabrum. 



(6) With acuminate centre : Sabouraudi group : — 



(13) Without duvet when old — Sabouraudi. 



(14) With duvet when old — Pilosum. 



Courmont's parasites cannot be easily classified. 



