TRICHOPHYTONEAE 477 



separate endospore in each locule. The endospore is ejected from the end of 

 the closterospore and is uninucleate, giving rise to a uninucleate secondary 

 mycelium which bears uninucleate aleurospores. 



The phylogenetic position of this genus is not altogether clear but it would 

 seem to be primitive, the incompletely divided closterospore representing a 

 gametangium of the general type of that of the Ascoideaceae where the spore 

 number is reduced (or the spore may even germinate before forming its wall). 

 The resulting mycelium would be homologous with uninucleate diploid asco- 

 genous hyphae and the aleurospores with asci. On the other hand, although 

 less probable, the closterospore may represent an ascus and the aleurospore 

 uninucleate haploid conidia. 



The genus may be differentiated from other members of the group by the 

 incomplete division of the closterospore Avith the formation of endospores. 



Pinoyella simii Castellani & Chalmers, Man. Trop. Med. ed. 3, 1023, 1919. 



Epidermophyton simii Pinoy, C. R. Soc. Biol. 72: 59, 1912; Bull. Soc. Path, 

 Exot. 5: 60-93, Pis. 3, 4, 1912. 



A transmissible disease of the glabrous skin of monkeys first described by 

 Levaditi and shown to be mycotic by Ravaut. Inoculable to guinea pig, 

 producing swelling of skin and some invasion of the hair of the ectoendothrix 

 type. In epidermis the mycelium is composed of short cylindric cells, 4 x 5.8/*, 

 easily dissociated. Closterospore 4-6-locular, rarely less, the septa not com- 

 plete, so it is in reality only a coenocyte with constrictions, germinating with 

 as many filaments as locules. The contents of each locule may be isolated by 

 a wall as thick as the wall of the closterospore, thus forming spores which are 

 expelled from the upper end of the closterospore, if it is still attached to the 

 mycelium, or by either end if it is free. Each of these endospores is uninu- 

 cleate, contains reserve food granules, and germinates either with septate, 

 uninucleate secondary mycelium or directly to a sporiferous hypha of the 

 Acladium type, producing uninucleate lateral aleurospores 2.5-3/x. No spirals 

 or nodular organs are present. 



On Sabouraud medium, it forms an orange yellow point on the fifth or 

 sixth day, producing thick-walled closterospores. Growth slow at first, sub- 

 cultures of more rapid growth, forming a white velvety mycelium with very 

 degenerate closterospores as in subcultures of Microsporum canis. 



EPIDERMOPHYTON 



Epidermophyton Sabouraud, Les Maladies du Cuir Chevelu 3: 420-446, 

 1910, not Epidermidophyton Lang, Klin. Vortrage 7 ser. 208: 1765-1788, 8 figs., 

 1879, nor Epidermophyton Megnin, C. R. Soc. Biol. 33: 404-406, 1881, nor 

 Gueguen, Champ. Paras. Homme Anim. 145: 1904. 



While Lang proposed the name Epidermidophyton in 1879, it was not 

 proposed as a genus name but rather as a common name for fungus filaments 



