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POPULAR SCIENCE REVIEW. 
EXPLANATION OF PLATE XII. 
Fig. 1. Mercury Rust (U redo confluens), on leaf of Mercurialis perennis. 
„ 2. Spores of the same, magnified. 
„ 3. Nightshade Rust ( Uredo Circcece ), on leaf of the enchanter’s night- 
shade ( Circcea lutetiana). 
„ 4. Spores of the same, magnified. 
„ 5. Twin-spot Rust ( Uredo bifrons), on leaf of Sorrel ( Unimex acetosa). 
„ 6. Pustule of the same, enlarged. 
„ 7. Spores, magnified. 
„ 8. Corn Rust ( Trichobasis rubigo-verd ), on leaf of wheat. 
„ 9. Portion enlarged, showing the pustules. 
,, 10. Spores further magnified. 
„ 11. Cluster of spores of Trichobasis linearis. 
„ 12. Spores of the same, further magnified. 
„ 13. Ragwort Rust ( Trichobasis Senecionis), on leaf of Senecio vulgaris. 
„ 14. Spores of the same, magnified. 
„ 15. Thistle Rust ( Trichobasis suaveolens), on leaf of Cnicus arvensis. 
„ 16. Spermogone of Thistle Rust, magnified (De Bary). 
,, 17. Spores of Thistle Rust, magnified. 
„ 18. Rose Rust ( Uromyces ulmarice ), on branchlets of dog-rose ( Rosa 
canina). 
„ 19. Spores of the same, magnified. 
„ 20. Vetch Rust ( TJromyces appendiculata ), on leaf of Vida Cracca. 
„ 21. Appendiculate spores of the same, magnified. 
„ 22. Pilewort Rust ( Uromyces ficarue), on leaf of pilewort ( Ranunculus 
ficaria ). 
„ 23. Spores of the same, magnified. 
„ 24. Cow-wheat Rust (Coleosporium Rhin an th acearum), on leaves of 
wood cow- wheat (Melampyrum pratense). 
„ 25. Free spores from the same, magnified. 
„ 26. Sow-thistle Rust ( Coleosporium sonchi-arvensis), on portion of leaf 
of Sonchus oleraceus. 
„ 27. Group of spores from the same, magnified (De Bary). 
„ 28. Coltsfoot Rust ( Coleosporium Tussilaginis), on portion of leaf of 
coltsfoot ( Tussilago Farfara). 
„ 29. Spores of the same, magnified. 
„ 30. Group of spores, in situ, of Coleosporium Rhinanthacearum (Tulasne). 
„ 31. Trefoil Rust ( TJromyces apiculosa), on leaf of clover ( Trifolium 
repens). 
„ 32. Spores of the same, magnified. 
PLATE XIII. 
Fig. 1. Willow Rust (Lecythea caprearum), on leaf of sallow (Salix caprea ;). 
„ 2. Spores of the same, magnified. 
„ 3. Ringlet Rust (. Lecythea gyrosa ), on portion of leaflet of raspberry 
( Rubus vitis-idcea). 
