TRICHOPHYTONEAE 489 



In scrapings, hyphae straight, occasionally dichotomous ; spores rare, 4-6/*, 

 thick-walled. 



Not isolated. Since a score or more dermatophytes produce similar hyphae 

 in scrapings, this name might well be permanently dropped from the literature 

 in accordance with the provision of the International Rules of Nomenclature 

 for names which can only be a permanent source of confusion. See also 

 Brochet & Wilhelm (1932), which is said to deal with this species. I have 

 been unable to procure a copy. 



Trichophyton amethysticum Williams, Arch. Derm. Syphilol. 5: 161-173, 

 4 figs., 1922 (nonien nudum). 



Microsporum amethysticum Weidman, fide Bruhns & Alexander in Jadas- 

 sohn, Handb. d. Ilaut- u. Geschlechtskrankh. 11 : 145, 1928. 



Lesions on hands or feet. I have not been able to find further mention 

 of this organism ; perhaps it is a strain of E. purpureum, which was given a 

 temporary name for purposes of tabulation. Evidently it is not Favotrichophy- 

 ton violaceum, which is mentioned in the same table. 



Excluded Species 



Epidermophyton repens (Eklund) Sartory, Champ. Paras. Homme Anim. 

 516, 1922. 



Lepocolla repens Eklund, Ann. Derm. Syphiligr. I, 2: 197-203, 1883. 



Achorion repens Gueguen. 



Isolated from psoriatic lesions and cultivated in liquid media. Hyphae 

 were reported as 0.6-0.8/* in diameter, which would suggest Actinomyces rather 

 than Epidermophyton. The description is too poor to have any value, and this 

 name may well be dropped as a permanent source of confusion. 



Whether Epidermidophyton Lang, Klin. Vortrage 7 ser. 208: 1765-1788, 

 8 figs., 1879, refers to the same organism is doubtful. From time to time va- 

 rious fungi have been reported from psoriatic lesions, but probably all are 

 either secondary invaders or cultural contaminants. 



ENDODERMOPHYTON 



Endodermophyton Perry, 1907; Castellani & Chalmers, Man. Trop. Med. 

 ed. 1, 610, 1910. 



The t;^'pe species is Endodermophyton concentricum (Blanchard) Castel- 

 lani & Chalmers. 



So far I have been unable to locate the original place of publication of 

 this genus name, owing to the poor bibliography of Castellani. The cultural 

 characters were first correctly and completely described by Nieuwenhuis 

 (1898), although he did not name the organism. Earlier workers had isolated 

 species of Aspergillus (probably contaminants). 



Mycelium producing chlamydospores or thick-walled arthrospores which 

 function as chlamydospores. Other spore forms not seen; giant colonies flat, 

 folded sometimes moist ; producing scaling of epidermis with pruritus but nc 

 inflammation. 



