IOI4 ASCOMYCETES AND BASIDIOMYCETES 



Achorion quinckeanum Zopf, 1890. 



The fungus appears in the lesions in the shape of numerous 

 mycelial filaments often dissociated in so many small segments 

 constituting so-called spores. Grows readily on Sabouraud's agar, 

 producing white, downy colonies. 



This fungus botanically holds an intermediate position between 

 the typical Achorions and the Microsporons and Trichophytons, 

 conidia bearing hyphse of the type Acladium being present. It 

 produces, however, typical favus lesions with scutula. 



Pathogenicity. — Is the cause of favus in mice, and may occa- 

 sionally infect man, in whom, too, it induces typical favus. It can 

 be inoculated into guinea-pigs. 



Achorion gypseum Bod in, 1907. 



Found by Bodin in 1907 in a typical case of favus. On Sabour- 

 aud's agar the growth, which is roundish, presents a little white 

 duvet in the centre, while the rest has a glabrous surface of yellowish 

 colour. Old cultures become pleomorphic, with presence of abun- 

 dant white duvet all over the growth. Botanically the fungus is 

 closely allied to the Trichophytons and Microsporons, but gives rise 

 to typical favus, with scutula, when inoculated in mice and guinea- 

 pigs. The inoculation of pleomorphic cultures does not cause any 

 eruption. 



Achorion arloingi R. Blanchard, 1891. 

 Synonym. — Achorion arloingi Busquet, 1891. 



Incompletely known species. Was isolated from a human trichophytic- 

 like eruption by Desir de Fortunet and Courmont. Is said to be inoculable 

 into mice, rabbits, and man. 



Genus Lophophyton Matruchot and Dassonville, 1899. 



Mycelial filaments, either tortuous, very thin, or thick, with granular 

 protoplasm. No spores present. One species only. 



Lophophyton gallinae Megnin, 1 88 1. 



Synonyms. — Epidermophyton gallincs Megnin, 1881; Lophophyton gallincB 

 Matruchot and Dassonville, 1899; Achorion gallincs Sabouraud, 1910. 



In the lesions mycelial filaments are seen, some thin and tortuous, without 

 practically any protoplasm; others of much larger dimensions, with granular 

 protoplasm. No spores observed. The fungus is easily cultivated, and is 

 inoculable into rabbits, mice, and fowls, in which it gives rise to typical 

 favus lesions. In man it does not produce favus, but merely trichophytic-like 

 erythematous, squamous patches. 



Genus Epidermophyton Lang, 1879, emendavit Sabouraud, 1907. 



Definition. — Trichophytinese with mycelial filaments and spores 

 present in the lesions and with pluriseptate spindles present in 

 the cultures. Does not attack the hairs or hair follicles, but grows 

 in the superficial layers of the epidermis. 



Type Species. — -Epidermophyton cruris Castellani, 1905. 



Remarks. — -The fungi belonging to this genus, which has been 

 investigated by Sabouraud and Castellani, grow superficially on the 



