PLATE CXII. 



FIGS - PAGE 



Iand3. Xanthidinm Rrebissonii Ralfs. 1, x about 



360 (after Ralfs) ; 3, x 460 . . 77 



2 and 4. X. Brebissonii var. rarians Ealfs. x 400 



(after Ralfs) ... 78 



5-9. X. aculeatum Klirenb. 5-7, x 400 (after 

 Ralfs) ; 8, x 500 ; 9, zygospore, x 400 

 (after Lund ell) . . 73 



10. X. condnnum Archer, x 740 86 



H-12. X. condnnum var. Boldtianum West. x 400 87 



