The cultivation of four old non-sporulating strains ofTrichophyton quinckeanum on solid nutrient medium with 15% CO2 (Sabouraud dextrose agar) gave an increased production of macroconidia. The macroconidia are multilocular with smooth walls. It is believed that the polymorphism of the macroconidia — some with pointed tip and other with round terminal cell — is characteristic of the species and has a taxonomic significance. Macroconidia with a pointed end cell are not of theMicrosporon type, since they have smooth walls and are not pointed on both ends Filiform appendages from the terminal cell occur regularly. Small and large macroconidia were seen. The microconidia are pyriform or elongated. No rounded microconidia withBotrytis type of arrangement were observed. The so-calledT. niveum is probably identical withT. quinckeannum.