DR LAUDER LINDSAY ON NEW LICHENICOLOUS MICRO-FUNGI. 



553 



EXPLANATION OF PLATES XXIIL, XXIV. 



Plate XXIIL 



Figs. 1 to 18. Torula lichenicola. 



1 to 12. On Lecanora subfusca, 



1. Craig Choinich, Braemar. 



(a.) Portion of thai] us, with apo- 

 thecia, of the Lecanora. 



(b) Sections of said thallus and 



apothecia — magn ifi ed . 



(c) Oneof its apothecia — magnified. 



(d) Spore-filaments and spores of 



Torula* 



2. Ben Lawers. Spore-filaments and 



spores of Torula. 



3. Loch Tay. Do. 



4. Kyles of Bute. Do. 



5. Caerlaverock road, Dumfries. Spores. 



6. Dunglass, Berwickshire. Spore-fila- 



ments and spores. 



7. Pease Dean, Berwickshire. Spores. 



8. Near Cork. 



(a) Portion of thallus of the Leca- 



nora with apothecia. 



(b) Section of said thallus and apo- 



thecia. 

 (c) Spore- filaments and spores of 

 Torula. 



9. Castle Bernard, Co. Cork. Spore-fila- 



ments and spores. 



10. Rathconnac, Co. Cork. 



(a) Portion of thallus, with apo- 



thecia, of the Lecanora. 



(b) Section of said thallus and an 



apothecium. 



11. Great Island, Cork. 



(a) Portion of thallus of the Leca- 



nora with apothecia. 



(b) Spores. 



12. Carrigaloe, Cork. 



(a) Portion of thallus of Leca- 



nora. 



(b) Section of do. 



13. On Lecidea canescens. Aghada, Cork. 



(a) Portion of thallus of the Lecidea with 



apothecia. 

 (b c) Sections of said thallus and an 



apothecium. 



14. On Lecidea parasema. Ireland. Spore- 



filaments and spores of the Torula. 



15. Accompanying Opegrapha atra, Schaarer's 



Exsic. No. 634. Spore-filaments and 

 spores. 



16. Accompanying Verrucaria epidermidis, 

 var. ; Malham, Yorkshire. Spore-fila- 

 ments and spores. 



17. In spermogonia of Lecanora varia, 



Leighton's Exsic. No. 176. 



(a) Portion of thalline scales bearing 



spermogonia. 



(b) Section of said spermogonia. 



(c) Normal spermatia and sterigmata 



of the Lecanora. 



(d) Associated Torula. 



(e) Spore-filaments and spores of do. 



18. Torula lichenicola on Lecanora subfusca. 



Ardrum, Co. Cork. Spore-filaments 

 and spores. 

 Fig. 19. Coniothecium lichenicolum. 



On Lecanora parella. Morchone, Braemar. 



(a) Portion of thallus of Lecanora, 



showing the parasite on its 

 areola;. 



(b) The Coniothecium, magnified 



and sectioned. 

 Fig. 20. Isidium corallinum. Craigie, Perth. 



(a) Section, logitudinal. 



(b) Portions (terminal) of some of the Isidia, 



variously magnified. 



(c) Portion of the plant viewed from above, 



showing the brown-tipped apices of 

 the Isidia. 

 Fig. 21. Parasite on I. corallinum (sub-nom. Lichen 

 dactylinus, Ach.), in Herb. Kew. 

 {a) Section of disk. 

 (6) Sporidia. 

 Figs. 22 to 28. Coniothecium lichenicolum. 



22. On J. corallinum. Craigie, Perth. 



(a) Portion of thallus of the Isidium. 



(b) Do. magnified. 



(c) Sections of parasite. 



23. Diplotomma calcareum. Clapham, York- 



shire. 



(a) Portion of thallus of the Diplo- 



tomma. 



(b) Do. magnified. 



(c) Sections of the parasite. 



24. Coniothecium lichenicolum. Kinnoull, 



Perth. Spores. 



25. Do. Scuir-na-gillean, Skye. Spores. 



26. Do. Sligachan, Skye. Spores. 



27. Do. Mangerton, Co. Kerry. 



(a) Portion of thallus of host. 



(6) Sections of the parasite, variously 



magnified, 

 (c) Spores. 



28. Do. NorthWales; Davies, inHerb.Kew. 



(a) Sections of the parasite. 



(b) Spores. 



* The magnifying power is that which I have uniformly adopted in my drawings of microscopical structure 

 in Lichens, viz., 425 diameters linear (under Objective No. 3, and Eye-piece No. 3) of a Nachet's microscope 

 made for me in 1851 (vide " Otago Lich. and Fungi," foot note, p. 410). 



VOL. XXV. PART II. 7 D 



