154 NEW OR CRI1*ICAL FUNGIi processes ; base and main branches rusty-brown, becoming ochra- ceous upwards, pruinose with the elliptical, colourless spores, which measure 5-6 x 3'5-4 /x. Fragrant. On rotten wood. Rock garden, Kew Gardens, Oct. 1895. Foraiing dense tufts 5-6 in. across. A very distinct species, characterised by the rusty colour, and fragrant, spicy smell, which resembles that of Lentinus cochleatus. MoUisia chionea Mass. & Crossl. (PI. 357, figs. 21-24). Gre- garious or crowded, sessile, but attached by a somewhat narrowed base ; thin and fragile, snow-white, almost translucent when moist, becoming dead-white when dry ; subglobose and closed when young, gradually becoming plane, and finally slightly convex ; margin minutely fimbriate externally, very delicately pruinose, about 1 mm. across ; cortex composed of hexagonal cells which are shghtly elongated in the direction from base to margin, 20-25 x 10-12 /x, running out into crowded, parallel hyphse of different lengths to form the irregularly fimbriate margin ; asci cylindric-clavate, apex narrowed, base rather stout, 40-45 x 5-6 /x, 8-spored; spores irregularly 2-seriate, hyaline, continuous, smooth, narrowly cylin- dric-oblong, ends obtuse, straight or very slightly curved, 6-8 x 1*5-2 /x ; paraphyses cylindrical, about 2 /* thick, scarce. On dead or dying stems of Careo) pendula. Elland, West Yorks. Comm. C. Crossland. Coll. W. Needham.. Oct. 1894. Bearing some superficial resemblance to Helotium eburneum, which sometimes occurs on the same host, but distinguished by its larger size, absence of stem, much larger cortical cells, and some- what larger spores. Substance soft and watery when growing. Description of Figures on Plate 357. — Fig. 1. Clypeum peltatum, group of plants on portion of a leaf; nat. size. 2. Single plant of same; x 7. 3. Paraphyses and ascus, with spores of same; 400. 4. Dasyscypha trahi- nelloides, paraphyses and ascus with spores ; x 400. 5. Scleroderris virescens, paraphysis and ascus with spores ; x 400. 6. Pseudopeziza Ellisii, plants on culm of Festuca tenella ; nat. size. 7. Paraphysis with ascus and spores of same ; x 400. 8. Spragueola americana, plant ; nat. size. 10. Hypocrella ochracea, plants on portion of a leaf; nat size. 11. Section through a fungus of same ; x 10. . 12. Ascus containing spores of same ; the spores have become broken up into their component cells ; x 400. 13. Portion of a spore intact, also isolated cells of same; x 400. 14. Sterigmatocystis vitellina, two -gl&nts; nat. size. 15. Section of fertile head of same ; x 350. 16. Portion of head showing origin of spores; x 600. 17. Polyporus diminutus, plants; nat. size. 18. Plant of same ; x 10. 19. Geoglossum lignicolum, plants ; nat. size. 20. Spore of same ; x 400. 21. MoUisia chionea Mass. & Crossl., plants on portion of culm of Carex pendula ; nat. size. 22. Same, slightly magnified. 23. Sections of same in various stages of development. 24. Spores of same X 400.
