DR. LINDSAY ON WEST-GREENLAND LICHENS. 365 
menium, showing ascus and para- 
physes; à, sporidia, one under iodine. 
Fig. 24. Lecidea Egedeana, Linds., on Parmelia 
saxatilis, Ach., Jakobshavn: a, sec- 
tion of hymenium under iodine; 
© b, sporidia. 
Fig. 25. Peltigera scabrosa, Th. Fr., Kikerton Is- 
lands: a, ascus; b, sporidia. 
. Fig. 26. Physcia stellaris, L., Jakobshavn : a, spo- 
ridia; 5, spermatia and sterigmata. 
Fig. 97. Parmelia stygia, L., Jakobshavn: spo- 
ridia. ` 
Fig. 28. Cladosporium lichenicolum, Liùds., on 
Peltigera canina, Braemar. 
Fig. 29. Parmelia saxatilis, Barmouth, bearing the 
parasitic Dothidea homostegia, Nyl. : 
a, sections of parasitic perithecia. 
Fig. 30. Dothidea otagensis, Linds. : sporidia [after 
Cooke *]. 
Fig. 31. D. homostegia, Nyl. : a, séction of a com- 
pound perithecium ; 5, sporidia [both 
after Cooke *]. 
Fig. 32. Lecanora frustulosa, Ach., Jakobshavn. . 
sporidia. 
Fig. 33. L. badia, Ach., Jakobshayn : sporidia. 
Fig. 34. L. badia, G. Don, 1805, in Herb. Kew: 
sporidia. 
Fig. 35. Lecidea badio-atra, Flk., Nyl. Exs.: spo- 
ridium. 
Fig. 36. L. atro-brunnea, Ram., Scheer. Exs. 444 : 
sporidia. 
Fig. 37. L. atro-brunnea, Nyl. Exs.: sporidia. 
Fig. 38. L. galbula, Ram., Pyrenees, Spruce & 
Babington, in Herb. Kew : sporidia. 
PLATE XLIX. 
Fig. 1. Parasite on Solorina crocea, L., Ben 
Lawers: a, sections of its perithecia. 
Fig. 2. Parasite on S. crocea, Kerry: a, stylo- 
spores. 
Fig. 3. Parasite on S. crocea, Lyngemarken : 
a, free sporidia; 5, section of hyme- 
nium. 
Fig. 4. Parasite on S. crocea, Himalayas: spo- 
ridia. 
Fig. 5. Umbilicaria cylindrica, L., Jakobshavn: 
a, apothecia ; 4, sporidia. 
Fig. 6. U. cylindrica, Nyl. Exs.: sporidia. 
Fig. 7. U. cylindrica, Scotland : sporidium. 
Fig. 8. U. arctica, Ach., Jakobshavn: sporidium. 
Fig. 9. U. anthracina, Wulf., Norway: a, section 
of hymenium under iodine; 4, c, two 
forms of sporidia. 
Fig. 10. U. spodochroa, Hffm., Norway: a, ascus 
with rudimentary sporidia; . 5, free 
sporidia. 
Fig. 11. Parasite on U. velles, L., Dunoon and 
Norway: a, section of hymenium,show- 
ing asci (one under iodine) and rudi- 
mentary sporidia; 5, free sporidia. 
Figs. 12, 13. Pannaria brunnea, Sw., Jakobshavn 
and Illartlek: a, sections of hyme- 
nium, showing asci with young spo- 
ridia, and paraphyses ; 5, free sporidia. 
Fig. 14. Squamaria chrysoleuca, Sm., Kudlesæt : 
a, section of hymenium under iodine ; 
b, free sporidia. 
Fig. 15. S. chrysoleuca, Scher. Exs. 345 : a, b,two 
forms of sterigmata and spermatia. 
Fig. 16. S. chrysoleuca, Nyl. Exs.: sporidia. 
Fig. 17. S. elegans, Link., Jakobshavn: a, tips 
of paraphyses ; 4, isolated articulations 
of paraphyses; c, sporidia; d, sporidia 
of parasite. i 
Figs. 18, 19. Lecanora calcarea, Ach.; Jakobshavn 
and Kudlesæt : sporidia. 
Fig. 20. L. calcarea, Ach.: a, Northumberland, 
W. Robinson, 1812; b, Switzerland ; 
c, Pyrenees, Spruce and Babington ; 
d, var. concreta = Schær. Exs. 476: 
all in Herb. Kew ; sporidia. 
Fig. 21. L. subsophodes, Nyl, Arctic America, 
Franklin's first land journey; in 
Herb. Kew: sporidium. 
Fig. 22. Lecidea petrea, Wulf., Scher. Exs. 178: 
sporidium. 
Fig. 23. Lecanora sophodes, Ach., Scher. Exs. 
569: sporidium. 
* In letter of date 1867. 
