92 Cayley . — Some Observations on the Life-history of N. galligena . 
PLATE VI. 
Fig. 7. Microconidia and monopodial sporophore. X 1000. Fresh material. 
Fig. 8. Multinucleate bicellular spore, x 1,000. Fixed and stained. 
Fig. 9. Ascospores. x 1,000. Fresh material. 
Fig. 10. (a) Macrospores, x 1,000. Stained intra vitam. (g) Large macrospores, showing 
one cell with two nuclei, with a neighbouring enucleate celled. Fixed and stained. 
Fig. 11. Young macrospores on branched sporoph ores. x 1,000. Fresh material. 
Fig. 12. Macrospore giving rise directly to another sporophore and macrospores. X 700. 
Fresh material, (a) Mature macrospore with three binucleate cells. Stained ultra vitam. 
Fig. 13. {a) Linked mature ascospores, with cells containing oil drops, forming pseudo-palisade 
tissue, destined to become sporodochial tissue. x 800. Fresh material grown on oatmeal-agar. 
(g Various metamorphosed macrospores. Stained intra vitam . 
Fig. 14. Asci in various stages of development. Fixed and stained. 
Fig. 15. Ypung perithecium, showing bases of two very young ascogonia with multinucleate 
cells. Grown on potato-glycerine medium, x 1,300. Fixed and stained. Drawn camera lucida. 
Fig. 16. Two perithecia, one on either side of a pycnidium, on bark. ( a) Young perithecium 
with ascogonia. g) Older perithecium filled with paraphyses before the development of asci. 
(c) Pycnidium. Drawn camera lucida. x 310. 
Fig. 17. Portion of the pycnidium in Fig. 16, showing pycno-sporophores abstricting pycno- 
spores in acropetal succession, x 1,500. 
Fig. 18. Cells of the hypothecial layer at the base of the perithecium containing large and small 
nuclei, from which the asci develop. x 1,800. Fixed and stained. 
Figs. 19, 20, 21, and 22. Consecutive sections of a young perithecium, cut 3 /jl thick, showing 
multicellular multinucleate ascogonia. One ascogonium is degenerating. Grown on potato-glycerine 
medium, x 1,600. Fixed and stained ; drawn camera lucida. 
Fig. 23. Early stage of perithecium, coiled hyphae. Fixed and stained, x 1,000. 
Fig. 24. Linked macrospores, showing one cell with two nuclei. Fiesh material stained intra 
vitam with sat. eryth rosin in glycerine. 
