PLATE I. 



FIGS. PAGE 



1-7. Gonatozygon monotfeniiim De Bary. 1-3, 6, 

 after De Bary, x 390 ; 4, 5, 7, x '-520 ; 6 and 

 7, zyg'ospores . . . .30 



g_l]._^. Brebissonii De Bary. 8, 9, 11, x 520; 10, 



after De Bary, x 390 . . . -".1 



12-14. G. Brebissonii' var. Iseve (Ililsc) West & G. S. 

 West. 12 and 13, x 400; 14, zyg-ospore, 

 after De Bary, x 3<M> . .' 3'2 



15. G. Brtbi **< mil. var. iniit ntiim A\ r est cV; G. S. West. 



x 400 . . . . 33 



1 ('>. G. Brrbixxon,!/ vnr. -in hi niu'in, West & G. S. West , 



forma. x 400 



17. r;. Kjdlmani Wille. After Wille, x 400 33 



18. G. K/i'Iluiaiii forma, 'minor West & G. S. West. 



x S30 . . . .31 



19-20. ^T. vilnxum Wolle. 19, x 400 ; 20, after Wolle, 



x 500 34 



