PLATE II. [PAGE 49.] 

 FERNS AND LICHENS. 



Fig. 



1. Chlorococcum wig are. 



2. Parmelia parietina. 



3. Parmelia parietina, section of a 



saucer (apothecium). 



4. Parmelia parietina, gonidia and 



asci. 



6. Parmelia parietina, asci and para- 

 physes ; 5 a, spores. 



6. Calicium clavellum. 



7. Calicium clavellum, stalked apo- 



thecia. 



8. Calicium clavellum, apothecium. 

 0. Polypodium vulgare, frond. 



10. Polypodium vulgare, lobe of frond. 



11. Polypodium vulgare, group of cap- 



sules (thecse). 



12. Polypodium vulgare, capsule and 



spores. 



13. Polypodium vulgare, spore germi- 



e. 

 um vulgare, prothallium. 

 um vulgare, portion of 

 prothallium, with archegonia. 



Fig. 



16. Aspidiumjilix mas, frond. 



17. Aspidiumjilix mas, pinnules with 



sori. 



18. Aspidiumjilix mas, single pinnule. 



19. Scolopendrium vulgare, frond. 



20. Scolopendrium vulgare, portion of 



frond. 



21. Cladonia cocci/era. 



22. Cladonia cornuta. 



23. Cladonia pyxidata. 



24. Cladonia rangiferina. 



25. Cladonia rangiferina, ends of po- 



detium. 



26. Graphis scripta. 



27. Graphis scripta, lirellae. 



28. Graphis scripta, asci and spores. 



29. Graphis scripta, spore. 



30. Opegrapha betulina. 



31. Opegrapha betulina, lirellae. 

 S'2. Opegrapha betulina, lirella. 



33. Opegrapha betulina, ascus with 



spores. 



34. Scalarifi 



