98 LICHENACEI. [STENOCYBE. 
Stenocybe eusporwm Mudd, Man. p. 256, t. iv. f. 103. Calictum 
eusporum Cromb. Lich. Brit. p. 13. Calicium septatum Leight. 
Lich. FI. p. 45, ed. 3, p. 45. Sphinctrina septata Leight. Ann. & 
Mag. Nat. Hist. ser. 2, xix. (1857) p. 132, t. 8. ff. 20-24. The 
specific name of Leighton, though having priority, is quite inappli- 
cable in this genus.—Brit. Hxs.: Mudd, n. 242; Leight. n. 228; 
Cromb. n. 9. 
There has been considerable difficulty about this plant, owing to the 
variable character of the spores, which, as already observed, has led to its 
being confounded with the preceding. The thallus is so thin as to be 
scarcely distinguishable from the bark upon which it grows, and is usually 
evanescent or none proper. The apothecia are generally numerous, some- 
times 2-8 congregate, with the stipites varying in length from yy to 
} inch, and occasionally, when more elongate, becoming branched. 
Hab. On the bark of holly, and also parasitic on the thallus of Thelo- 
trema lepadinum and Graphis elegans in upland wooded districts.—Distr. 
Local, though common where it occurs, in 8. and N. England and in S. 
and W. Ireland. B. M.: Near Lyndhurst, New Forest, Hants; Ingleby 
Park and Bousdale Gill, Cleveland, Yorkshire. Glenbower Wood and 
near Castlemartyr, co. Cork; Ture Mt., Killarney, co. Kerry; Kylemore, 
co. Galway. 
. 
3. S. byssacea Nyl. Bot. Not. 1884, p. 84.—Thallus scarcely any 
visible, or obscure and obsolete. Apothecia small, much scattered, 
blackish ; stipes very slender, sometimes branched ; capitulum cla- 
vato-tubiform ; spores simple or at length 1—-3-septate, 0,015-23 mm. 
long, 0,005-7 mm. thick; paraphyses few; hymenial gelatine 
scarcely tinged with iodine.—Cromb. Grevillea, xv. p. 14.—Calicium 
byssaceum Fr. Sched. Crit. i. (1824) p. 6; Cromb. Journ. Bot. 1873, 
p. 132; Leight. Lich. FI. ed. 3, p. 45. 
Closely allied to the two preceding species, but smaller and more 
slender, with the apothecia very much scattered and the spores smaller. 
Unless after a shower of rain, it is scarcely visible, and is consequently 
overlooked. The apothecia are frequently branched, becoming occasion- 
ally somewhat fasciculate. 
Hiab. On the trunks and branches of old alders in upland wooded 
districts.— Distr, Local and scarce in W. England, N. Wales, and among 
the Grampians, Scotland—B. M.: Hay Park, Ludlow, Shropshire; 
Capel Curig, Carnarvonshire. Glen Lochay and Blair Athole, Pbrthahines 
Glen Cluny, Braemar, Aberdeenshire. 
23. CONIOCYBE Ach. Vet. Ak. H. 1816, p. 288; Nyl. Mém. Soc. 
Cherb. iii. (1855) p. 168.—Thallus effuse, leprose, thin, or scarcely 
any distinct; gonidial layer consisting of gonidimia, various in 
form. Apothecia stipitate, globoso-pulverulent, yellow or pale, 
stipes usually elongate; sporal mass copiously accumulated on the 
capitulum ; spores spherical, simple, colourless, or pale-brownish, 
mixed with the paraphyses; spermogonia with simplish sterigmata, 
and oblong or ellipsoid spermatia. 
