ASPERGILLACEAE 653 



colony 5 cm. across with four zones, center 3 mm. with alternate light gray 

 and darker brownish gray bands with smaller, dark coremia. On Saboiiraud 

 agar, colonies smaller and zoning less noticeable, pale grayish green with white 

 border. No fructifications seen. Perithecia formed on Sabouraud agar and 

 potato, 200/x in diameter. Perithecia cespitose on potato glycerol. Organism 

 is strongly aerobic, showing very little growth in liquid media, but a good 

 pellicle is formed. Carbohydrates not fermented. Milk and Loeffler's serum 

 are peptonized. Blood not hemolyzed but in agar, gradually becomes green. 

 Gelatin liquefied. 



ONYGENACEAE 



The members of this family are saprophytic but confined to animal sub- 

 stances, such as hoofs, horns, claws, feathers, etc. They are included here, 

 since it is possible that eventually some members may be found parasitic. 

 When the family is studied more fully, it is possible that it may show resem- 

 blances to the dermatophytes, AcJiorion, or to some genera of Aspergillaceae 

 which seem to show some specialization on nails, e.g., Scopulariopsis. 



Onygena equina is the only species studied carefully. The fructifi- 

 cations are up to 1 cm. in height. They consist of solid homogeneous coremia 

 which abjoint, on their surfaces, so many chlamydospores that they seem to 

 be covered with a brown powder. Later each is differentiated into a solid 

 stipe, composed of parallel hyphae and a somewhat looser head, consisting of 

 radiating hyphae. On the outer surface of the head, the hyphae intertwine 

 to form a firm, pseudoparenchymatous peridium. The interior hyphae de- 

 velop into capillitium and aid in the dissemination of spores. 



Nothing is known of the cytology of this species. Within the head in 

 various places, tAvo short, septate branches coil about each other into a solid 

 knot. At maturity, the cavity of the head is filled by a dark spore mass 

 through which run the capillitium threads, generally starting at the base. 

 The peridium is ruptured irregularly, or around the base of the head, and the 

 spores are scattered. They germinate after a resting period, which may be 

 shortened by placing the spores in a mixture of HCl and pepsin, similar to 

 that in the gastric juice. Immature ascospores and chlamydospores germinate 

 without this stimulation (Ward 1899; Brierley 1917). 



BIBLIOGRAPHY 



Abrikossoff, A. 1929. tJber Splenomykosen und mykotische Splenomegalien, Arch. Path. 



Anat. Phys. [Virchow] 272: 593-612, 16 figs. 

 Agostini, Angela. 1930. Dermatomicosi dovuta a Eurotium rubium Bremer, Atti 1st. Bot. 



B. Univ. Pavia IV, 2: 65-79, 5 figs. 

 Aime, Paul Pierre Creuze & Hubert Kresser. 1933. Myeose pulmonaire a Penicillium 



crustaceum, avec signes cUniques et aspect radiologique d'abces du poumon, Presse 



Med. 41: 761-763, 5 figs. 

 Anderson, C. 1925. Sur un cas d 'otomycose a Sterigmatocystis nigra, Arch. Inst. Pasteur 



Tiims 14: 93-96. 



