442 BOTANICAL GAZETTE [DECEMBER 
PLATE XIX 
Uncinula Nothofagi Thaxter 
Fic. 7—Two perithecia showing variably developed appendages, the 
upper shown in surface view, the lower showing the appearance of the eight 
asci seen partly in optical section. 
Fic. 8.—A single well developed appendage enlarged. 
Fic. 9.—The tips of two appendages enlarged. 
Fic. 10.—Two asci. 
Uncinula magellanica Thaxter 
Fic. 11.—A single perithecium. 
Fic. 12.—A single appendage and three ae of appendages enlarged, 
showing variations in the terminal hooks. 
Fic. 13.—Two asci. 
