TRICHOPHYTONEAE 557 



sharply folded, approachiny cerebriiorin. Ou glycerol peptone agar, inter- 

 mediate between that on malt agar and on Sabonraud glucose agar. On beef 

 broth, forming white islets, light yellow below with some grayish fiocci on 

 the liquid. Gelatin liquefied; milk casein clotted then liquefied, colony white, 

 floating. On potato, a fine short, white velvet, with short irregular folds and 

 furrow; growth mediocre. 



The resemblance of primary cultures to pleomorphic cultures of A. Schoen- 

 leini at fii-st led Sabonraud to think that they might be the same species, with 

 the characters observed due to host reaction, as had been elaborately suggested 

 by Busquet (1890, 1891, 1892), without experimental evidence, but this hypoth- 

 esis was abandoned by Sabonraud before his classic work in 1910. Grigorakis 

 (1925) has recently revived and extended this idea to include all the derma- 

 tophytes. Bodin (1902) after a study of the nutrition of this organism claimed 

 that it was more closely related to the species of Microsponim and Trichophyton 

 than to Achorion Schoenlemi. Ota & Langeron (1923) also placed it in their 

 genus SahoiD-audites along with Microsponim and Ectotrichophyton. 



Achorion cupressiforme Aoki, Festschr. Keizo Dohi, 517-574, Pis. 40-42, 

 1917. 



Achorion sp. Aoki, Derm. Woch. 59: 863-872, 1914. 



Producing favus turriformis and favus confertus on glabrous skin with 

 lesions also on scalp. In one case there was swelling of lymph nodes with 

 cheesy pus formation. Easily inoculable to mouse and rabbit, producing 

 whitish scutula and healing spontaneously. 



Mycelium septate with swollen cells becoming chlamydospores, a few 

 closterospores present; arthrospores in scutula 3-8 x 2.5-5/^,. 



Growth rapid in medium, slow on surface, rapid in depths suggesting 

 cypress leaves, white becoming dirty white and finally yellowish white, sur- 

 face smooth and waxy. Center elevated, surrounded by a flat waxy zone with 

 periphery below surface of the medium. Reverse bright yellow. On broth, 

 floating floccose white colony becoming yellowish white, chlamydospores abun- 

 dant. On milk, growth slow, coagulated and digested after several weeks. 

 On lactose agar, center elevated, irregular then crimped, brownish yellow. On 

 potato, irregular brown to black brown, elevation surrounded by a white flat 

 surface, growth slow. On beef broth peptone agar (slightly alkaline), colony 

 as on Sabonraud, but moist shining and waxy, elevated in the center, sur- 

 rounded by a yellow white zone, marginal portion radiating, submersed. 

 Gelatin slowly softened (partial liquefaction), surface white then yelloAvish 

 white, reverse yellow. 



Achorion f ormoseum Hasegawa, 1927 ; Bruhns & Alexander, in Jadassohn, 

 Handbuch d. Haut- u. Geschlectskrank. 11 : 233, 1928. 



Lesions size of lentil, grayish white with favic scutula. Infected hair 

 lustreless and easily epilated. Fonnosa. Inoculation of guinea pig easy, with 

 typical scutula ; not inoculable to mouse, ape, or hen. 



Spores 3.5-4/x in the scutulum. along with septate, wavy mycelium; hair 

 showing spores, but not the air bubbles so characteristic of A. Schoenleini. 



