6 CONIOCARPINEE | CHENOTHECA 
Var. melanocephala A. L. Sm.—Thallus as in the species. 
Apothecia fasciculately branched, pruinose only at the margin ; 
spores globose or ellipsoid, pale brown, 4-16 p long, 4-8 p thick. 
—Calicium chrysocephalum £. melanocephalum Nyl. Syn. i. p. 147, 
t. v. f. 19 (1860) ; Leight. Lich. Fl. p. 40; ed. 3, p. 39; Cromb. 
in Grevillea xv. p. 14 (1886) & Monogr. i. p. 87. 
Exsicc. Leight. n. 134 pro parte. 
Differs from the species in the constantly dark epithecium, and 
especially in the colour and form of the spores, which vary from being 
globose and small to considerably large and ellipsoid. I have been 
unable to verify this from Leighton’s specimen. 
Hab. On old palings (associated with the Spee —B.M. Downton 
Castle, Herefordshire (the only locality). 
Ch. trabinella A. L. Sm.—Thallus ashy-grey or olive- 
eat thickish, granular, composed of minute congested sub- 
squamulose crenate granules. Apothecia small, the stalks rather 
short, slender, pale brown or blackish, the capitulum top-shaped- 
lentiform, greenish-yellow-pruinose, the sporal mass dark-brown 
and somewhat plane ; spores minute, globose, 3—5 » in diameter.— 
Ch. pheocephala Th. Fr. Lich. Arct. p. 251 (1860); Lichen 
trabinellus Sm. Engl. Bot. t. 1540 (1805); L. pheocephalus 
Turn. in Trans. Linn. Soe. viii. p. 260, t. 6, £. 1(1807). Calicium 
pheocephalum Turn. & Borr. Lich. Brit. p. 145 (1839) ; Hook. in 
Sm. Engl. Fl. p. 140; Cromb. Lich. Brit. p. 11 & Monogr. i. p. 88 ; 
Leight. Lich. Fl. p. 40; ed. 3, p. 39.  Phacotrum (Phacotium) 
trabinellum S. F. Gray Nat. Arr. i. p. 484 (1821). Cyphelinm 
pheocephalum Koerb. Syst. Lich. Germ. p. 317 (1855); Mudd 
Man. p. 261. 
Not to be confused with Calictwm xylonellum var. trabinellum 
Wahlenb. ex Ach. Meth. p. 93 (1803). The granular squamulose 
thallus, by which the species is characterized, varies in thickness and 
colour, according to the habitat. The British forms are typical, 
though the plant varies in other countries. The apothecia are 
numerous, and almost sessile on thicker thalli. 
Hab. On old boarded buildings, rarely on palings in wooded 
districts.— Distr. Local and scarce in S.E. and W. England.—B. M. 
Albourne, Hurstpierpoint and Woodmancote, Sussex; Hay Park 
near Ludlow, Shropshire; Bruisyard, Suffolk ; Lakenham near 
Norwich, Norfolk. 
3. Ch. acicularis Zwackh in Flora xlv. p. 535 (1862).— 
Thallus greyish, very thin, powdery, sometimes obsolete. Apo- 
thecia numerous, minute with a short slender dark-brown stalk, 
the capitulum somewhat narrow, top-shaped, and obconical, more 
or less citrine-pruinose, the dark-brown sporal mass usually much 
protruded ; spores minute, 3-4 » in diameter.—Lichen acicularis 
Sim. Engl. Bot. t. 2385 (1812). Phacotrum (Phacotium) hispidulum 
8. F. Gray Nat. Arr. i. p. 483 (1821). Calicium chlorellum Turn. 
& Borr, Lich. Brit. p. 146 (1839) (non Ach.) ; Hook. in Sm. 
