560 MEDICAL MYCOLOGY 



Disc 4 cm., chestnut maroon with irregular radial furrows, margin 

 fringed ; daughter colonies may appear on mother colony or at its margin, 

 elevated white chalky or yellowish brown. Subcultures on conservation agar 

 increasingly elevated and folded, becoming yellowish gray. Subcultures on 

 Sabouraud sugar media begin to resemble T. flavum or T. plicatile, 5-8 cm. in 

 diameter, crumpled, center brown, cracks in gray powdery surface, margin of 

 fine rays. 



Achorion passerinum Fischer, Derm. Woch. 87: 1359-1361, 2 figs., 1928. 



Producing large scutula on canary, a herpetic lesion on man, not patho- 

 genic for white mouse. 



Only intercalary or, rarely, terminal chlamj^dospores present ; clostero- 

 spores and aleurospores absent. 



Colony very slow growth, center with a thin white velvet, with radial 

 folds, fracturing in the center. 



Probably close to Achorion gallinae but white. 



Achorion niveum Greco, Origine des Tumeurs 67-83, Figs. 15-28, 1916. 



Producing small nodule like a lentil on the " cou-de pied," covered with a 

 crust, followed two months later by swelling of leg and redness. Followed by 

 similar nodules on other parts of the body. Pathology and case history de 

 scribed in detail. 



Filaments flexuous, l-2yu in diameter, granulous, intercalary chlamydo- 

 spores 4-6/A, round or fusiform, occasionally up to 8-lOja, sometimes terminal. 

 Endoconidia sometimes formed. 



Growth does not show for about 15 days on ordinary agars. On simple 

 agar, small cerebriform elevations resembling A. Schoenleini. On Sabouraud 

 conservation agar, potato, and carrot, elevations dull gray, with a fine pure 

 white nap of fascicles of hyphae. Similar structures below the surface brownish 

 gray. Colony finally crateriform, on Sabouraud agar. 



Achorion caninum (Costantin & Sabrazes) Dodge, n. comb. 



Oospora canina Costantin & Sabrazes, Arch. Med. Exp. 5: 354-358, 1893. 



Bodinia canina Brumpt, Precis Parasitol. ed. 4, 1297, 1298. 1927. 



Producing favus in dog, inoculable to man, mouse, and dog. 



Mycelium septate without favic candelabra; chlamydospores similar to those 

 of A. Schoerdeini, rare; in the scutula, long chains of ovoid arthrospores 5-6/a 

 and fascicles of hyphae staining less deeply. 



Colony with short, velvet, thick pure white, here and there powdeiy, red 

 pigment diffusing as in A. gallinae but darker. On milk, colony bright red. On 

 malt, pellicle adherent to walls of tube, wavy, snow white, reverse dark red and 

 medium becomes deep red. On potato, brown acuminate peaks, surrounded by 

 an extensive white velvet. Only chlamydospores and arthrospores known, 

 the former rare. Cytology not studied and its positions somewhat uncertain. 

 In lesions agreeing so closely that it seems to belong here. 



Achorion africana Dodge, n. sp. 



Achorion sp. Mitchell & Robertson, South African Med. Record 1915 ; 

 Med. Jour. S. Africa 20 : 122-125, 4 fi,gs., 1924. 



