175 
Industry, Dublin, and of Dr Mackay of Dublin, which last contains 
authentic specimens of the lichens described by Dr Taylor in the 
“ Flora Hibernica.” The fasciculi of dried specimens published by 
Schaerer, Hepp, Leighton, and others, as well as large numbers of 
specimens gathered in, and sent from, various parts of England, 
Wales, Scotland, and Ireland, were also examined. Besides the 
examination of dried specimens in herbaria, the author studied 
lichens extensively in their native habitats on the mountains of 
Scotland and Norway, and elsewhere. 
With the exception of two short memoirs,* already published by 
the author, the researches in question are the first that have been 
made on the subject under review in this country. The memoir is 
essentially organographic, and gives full details of the characters of 
the spermogones and pycnides of the higher lichens, — that section, 
namely, which comprises fruticulose, filamentous, and foliaceous spe- 
cies. The genera, whose spermogones and pycnides are described, 
are : — 
1- Usnea, Hoffm. 
2. Neuropogon , Nees and Flot. 
3. Chlorea, Nyl. 
4. Alectoria, Ach. 
5. Evernia, Ach. 
6. Dufourea, Ach. 
7. Dactylina, Ach. 
8. Ramalina, Ach. 
9. Roccella, Bauh. 
10. Thamnolia, Ach. 
11. Sphcerophoron, Pers. 
12. Acroscyphus, L6v. 
13. Stereocaulon, Schreb. 
14. Bazomyces, Pers. 
15. Cladonicc, Hoffm. 
16. Umbilicaria, Hoffm. 
17. Cetraria, Ach, 
18. Platysma, Hoffm. 
19. Nephromium , Nyl. 
20. Peltigera , Hoffm. 
* 1. “ Monograph of the Genus AbrothallusP Quarterly Journal of Micro- 
scopical Science, Jan. 1857. Transactions of British Association for 1856. 
Botanische Zeitung, Dec. 25, 1857. 
2. “ On the Structure of Lecidea lugubrisP Quart. Journ. of Microsc. Science, 
July 1857. 
t The nomenclature and arrangement followed here and in the Memoir is 
that of Dr Nylander of Paris, as given in his “ Synopsis methodica Lichenum 
omnium hucusque cognitorum.” Paris, 1858. Pp. 65. 
21. Solorma, Ach. 
22. Sticta, Ach. 
23. Ricasolia, DN. 
24. Parmelia, Ach. 
25. Physcia, Fr. 
26. Pyxine, Fr. 
27. Psoroma, Fr. 
28. Pannaria, Del. 
29. Coccocarpia, Pers. 
30. Amphiloma , Fr. 
31. Squctmaria, DC. 
32. Placodium, DC. 
33. Ephebe, Fr. 
34. Lichina, A g. 
35. Synalissa, DR. 
36. Omphalaria, DR. and Mont. 
37. Collema , Ach. 
38. Leptogium, Fr. 
39. Obryzum, Wallr.f 
