554 



DR LAUDER LINDSAY ON NEW LICHENICOLOUS MICRO-FUNGI. 



Fig. 29. Microthelia Cookei, on Leccmora crenulata. 

 Chichester. 



(a) Section of hymenium, showing asci and 



paraphyses. 



(b) Sporidia. 



Fig. 30. M. Stereocaulicola, on Stereocaulon paschale. 

 Glen Derrie, Braemar. 



(a) Portions of the podetia of Stereocaulon 



paschale, showing the deformities occu- 

 pied by the parasite; variously mag- 

 nified. 



(b) One of the conglomerate wartlets iso- 



lated. 



(c) Sections of the parasite. 

 (cl) Ascus, with young sporidia. 

 (e) Mature sporidium. 



Fig. 31. M. Umbilicarice, on Umbilicaria pustulata. 

 Norway. 

 (a) Portion of thallus of the Umbilicaria. 



magnified. 

 (6) Sections of the parasite. 



(Vide also Plate xxiv. fig. 3.) 

 Fig. 32. M. rugulosaria, on Placodium rugulosum. 



Tasmania. Sporidia. 

 Fig. 33. M. parietinaria, on Physcia parietina. Cot- 



tishall. Sporidia. 

 Fig. 34. Parasite on Thelotrema lepadinum. Ireland. 



(a) Sporidium. 



(b) Stylospores. 



Fig. 35. Parasite on Lecanora cenisea. Ayton, Cleve- 

 land. Sporidia. 



Plate XXIV. 



Fig. 1. Microthelia Nephromiaria, on Nephromium 

 cellulosum. Hermite Island, 

 (a) Old apothecium of the Nephromium ; 



under side — bearing the parasite. 

 (6) Sections of the parasite. 



(c) Section of hymenium, showing an ascus 



and paraphyses. 



(d) Sporidium, mature. 



Fig. 2. M. Nephromiaria, on Neuropogon Taylori. 

 Kerguelen's Land. 



(a) Ascus. 



(b) Mature sporidia. 

 Fig. 3. M. Umbilicarice. Norway. 



(a) Section of hymenium, showing asci and 



paraphyses. 

 (6) Young, and (c) Mature, ascus. 



(d) Oil globules. 



(e) Reaction of iodine on hymenial gelatine. 

 (/) Mature sporidia. 



{Vide Plate xxiii. fig. 31.) 

 Fig. 4. M. Stictaria, on Sticta Freycinetii. Campbell's 

 Island. 

 (a) Ascus, showing reaction with iodine. 

 (6) Sporidia, mature and young. 

 Fig. 5. Parasite on Lecidea pacliycarpa. Ireland. 



Sporidia, young and mature. 

 Fig. 6. Microthelia Bozomycearia, on Bceomyces rufus. 

 Balthayock. 



(a) Portion of thallus of the Bazomyces, 



showing — (1) its own young apothecia ; 

 and (2) the parasite. 



(b) Portion of same thallus, further mag- 



nified, showing young apothecia. 



(c) Sections of said apothecia. 



(d) Sections of parasite. 



(e) Sporidia. 



Fig. 7. M. atricola, on Lecanora atra. Derriquin, 

 Co. Kerry. 

 (a) Perithecia, magnified ; one sectioned. 

 (6) Sporidia. 

 Fig. 8. Parasite on Pertusaria. Balthayock, Perth. 



Sporidia. 

 Fig. 9. Gassicurtia silacea. Fontainebleau, Nyl. 

 Exsic. No. 150. 



(a) Portion of thallus of Lecanora atra, 



showing the parasite on its areolae. 



(b) Two of said areolae, further magnified. 



(c) Sections of the said areolae and of their 



parasite. 



(d) Spores. 



Fig.10. Microthelia vesicularia, on Lecidea vesicu- 

 laris. Switzerland. Sporida. 



Fig. 11. Spilomium Graphideorum. Fontainebleau, 

 Nyl. Exsic. No. 72. 



(a) Portion of thallus of Graphis, bearing 



the parasite. 



(b) Sections of the latter. 



(c) Spores. 



Fig. 12. Parasite on Lecanora poly tropa,xa.r.intricata. 

 Penmanshiel. 

 (a) Portion of thallus of the Lecanora, with 



apothecia and the parasite. 

 (6) Sections of young apothecia. 

 (c) Sections of mature apothecium and of the 



parasite. 

 (cl) Sporida or stylospores. 

 Fig. 13. Parasite on Lecidea albo-atra. Great Island. 

 Cork. 



(a) Portion of the thallus of the Lecidea with 



apothecia and the parasite. 



(b) Sections of (1) said apothecia and (2) 



parasite. 

 Fig. 14. Parasite on Squamaria crassa. Crosshaven, 

 Cork. 

 (a) Thallus bearing apothecia and the para- 

 site. 

 (6) Section of an apothecium and of the 

 parasite. 



(c) Section of hymenium, showing ascus and 



paraphyses. 



(d) Mature sporidia. 



Fig. 15. Parasite on Squamaria saxicola. Jerkin, 

 Norway. 

 (a) Portion of thallus bearing apothecia and 



the parasite. 

 (6) Sections of said apothecia and para- 

 site. 

 Fig. 16. Parasite on Endocarpon microsticticum. 

 Barmouth, N. Wales. 



(a) Section of hymenium, showing asci and 



paraphyses. 



(b) Mature sporidia. 



Fig. 17. Lecidea Endocarpicola, on Endocarpon hepa- 

 ticum. Glanmire Road, Cork. 



(a) Ascus under iodine, with young sporidia. 



(b) Paraphyses, isolated. 



(c) Sporidia, mature and young. 



Fig. 18. Abrothallus Moorei, on Cladoniabellidi flora, 

 Ach. Kelly's Green, Ireland. 



(a) Ascus. 



(b) Mature sporidia. 



(c) Stylospores. 



Fig. 19. Associated with Verrucaria Taylori. Duns- 

 combes Wood, Cork. Sporidium. 



