CONIOCYBE. } CALICIEI. 101 
4. ©. hyalinella Nyl. Mém. Soc. Cherb. v. (1857) p. 93; Syn. 
i. p. 164, t. v. f. 40.—Thallus obsolete. Apothecia small; stipes 
slender, hyaline, brownish above; capitulum globose; sporal mass 
white or pale-reddish; spores minute, 0,0025-0,004 mm. in dia- 
meter.—Cromb. Lich. Brit. p. 14; Leight. Lich. Fl. p. 47, ed. 3, 
p. 46. 
Occasionally there are traces of a very thin, whitish, and leprose thallus, 
but it is doubtful if this be proper. It is closely allied to C. paliida, but 
differs in the more slender stipes, and in the spores being at least half 
the size. 
Hab. On indurated stumps of trees in wooded upland districts.— 
Distr. Found only very sparingly in N. England.—B. M.. Brantsdale, 
Yorkshire. . 
24. TRACHYLIA Fr. Vet. Ak. 
Handl. 1821, p. 3824, pro parte; Nyl. 
Mém. Soc. Cherb. iii. (1855) p. 167; 
Lich. Scand. p. 44 (note).—Thallus 
granulose, or rarely subleprose, or 
wanting. Apothecia sessile, cupu- 
liform, open, black, with thin pro- 
per margin; sporal mass more or 
less accumulated, black ; spores 1- 
septate, rarely pluri-septate and wid 
WW 
irregularly divided, ellipsoid, black- 
ish or brownish-black ; hymenial : 
gelatine scanty and scarcely tinged 
withiodine. Spermogones with ob- 
long or ellipsoid spermatia. ‘ci 
Distinguished from the allied genera — a Fi e 
by the apothecia being constantly : g. 27. 
sessile, almost lecideiform, and the hee oe Se Ver- 
ellipsoid spores. As already noted 0" 3° "Pheon (with vounn 
ee 4 sips .  b a (with young 
under Calcium retinens, transition spores) and a paraphysis, x 350 
forms are not wanting, and Trachylia ¢. Older (free) spores, x 500. 
may not be generically distinct. The 4. Vertical section of a spermo- 
gonidia are globulose. gonium, X 30. ¢. Sterigmata 
and spermatia, 500. 
1. T. tigillaris Fr. Sum. Veg. (1846) p. 282.—Thallus effuse, 
granulose, or granulato-areolate, or concrescent, usually rimose, 
yellowish-green or citrine (K—). Apothecia small, plane, innate, 
black, the margin prominent, at length excluded ; spores 1-septate, 
0,015-25 mm. long, 0,008-11 mm. thick.—Cromb. Lich. Brit. p.14; 
Leight. Lich. Fl. p. 48, ed. 3, p. 47.—Acolium tigillare Gray, Nat. 
Arr. i. p. 452; Mudd, Man. p. 254. Calicium tigillare Turn. & 
Borr. Lich. Br. p. 182; Sm. Eng. Fl. v. p. 189. Lichen tigillaris 
Ach. Prodr. (1798) p. 67; Eng. Bot. t. 1530. 
There is a striking contrast between the colour of the thallus and of 
