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SUMMARY
A new genus, Lophotrichus, including two species, L. ampullus and L. martinii, is described, which has certain characteristics of the Chaetomiaceae. The two described species of this genus produce perithecia which, when grown in culture, are partially or entirely submerged, possess long necks, and have elongate, thick-walled terminal hairs restricted to the area immediately around the ostiole. Ascus characteristics are essentially the same as in the genus Chaetomium. The more or less submerged habit of the perithecia and the typical long necks are departures from the usual concepts held for the Chaetomiaceae.