SUMMARY
The methods and apparatus used for lyophilization of the Actinoplanaceae are described. One hundred per cent viability of 326 lyophile preparations, including in this number 266 different isolates, indicates that freeze-drying is a most reliable means of maintaining cultures of the Actinopalanaceae. The results of experiments show that both the mycelium and the sporangia can survive the freeze-drying process.