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SUMMARY
| 1. | Diagnostic characteristics are provided for a new species, Arachniotus reticulatus, and also for Byssochlamys nivea. | ||||
| 2. | The morphological development of these two species is discussed and illustrated. The formation of ascogenous hyphae and croziers precedes the production of asci in both species. This agrees with the findings of Rosenbaum for Arachniotus trisporus Hotson and of Benjamin for Byssochlamys nivea Westling. | ||||
| 3. | Arachniotus trisporus Hotson was found to lack a true peridium. Therefore, this species falls within the generic limits of Byssochlamys as was previously recognized by Benjamin and by Cain. However, the results obtained here verify the position taken by Benjamin in placing A. trisporus Hotson in synonomy with B. nivea Westling. | ||||
| 4. | The position of the genus Byssochlamys within the family Gymnoascaceae is discussed. | ||||