xxiv 



DESCRIPTION OF THE PLATES. 



7. C. atro-cteruleum,, var. lacerum, portion of fertile thalius, 

 magnified. 



8. Ditto, section of an apothecium. 



9. Ditto, section of apothecium and thalius. 



10. C. jpulposum, section of spermogone and thalius. 



11. Ditto, sterigmata and spermatia. 



12. C. crispum, var., section of thalius, showing a spermogone, 

 a> and a young apothecium, b. 



13. Ditto, spore germinating. 



14. Ditto, spore of another variety. 



15. C. multifidum, var., jacobcefolium, spore. 



16. C. nigrescens, spore. 



PLATE XX. 



1. Endocarpon miniatum, upper surface. 



2. Ditto, under surface. 



3. Ditto, magnified, showing papulose condition produced by 

 apothecia. 



4. Ditto, spores of var. umbilicatum. 



5. Ditto, sterigmata and spermatia. 



6. Ditto, section of thalius, showing apothecia. — a. ostiole. 



7. E. Smaragdulum, var. Sinopicum, thalline squamules, mag- 

 nified, showing ostioles of apothecia and spermogones. 



8. Ditto, section of a squamule, showing an apothecium, a, 

 and a spermogone, b. 



9. Ditto, thecee, containing an indefinite number of spores. 



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