X 



DESCRIPTION OF THE PLATES. 



PLATE IV. 



1. Cetraria aculeata. 



2. Ditto, apothecium magnified. 



3. Cornicularia ochroleuca. 



4. Ditto, apothecium magnified. 



5. Cornicularia vulpina. 



6. C.jubata. 



7. Ditto, apothecium magnified. 



8. Ditto, spore. 



9. Solorina crocea. — a. Upper, and b, lower surface. 



10. Ditto, apothecium magnified. 



11. Ditto, spore. 



12. Solorina saccata. 



13. Ditto, vertical section of apothecium. 



14. Ditto, apothecium magnified. 



15. Ditto, spores germinating. 



PLATE V. 



1. Roccella fuciformis, from Lima, South America, — "Lima 

 (thin) Orchella-weed." 



2. Roccella tinctoria, large variety from Lima. — "Lima (thick) 

 Orcheila-weed." 



3. Ditto, small dark variety, neither warted nor very sorediife- 

 rous, from the Cape de Verde Islands. — "Cape de Verde Orchella- 

 weed." 



