TRACHYLIA. | CALICIEI. 103 
Acolium stigonellum Mudd, Man. p. 254. Calicium stigonellum 
Ach. Meth. (1803) p. 88, pro parte. Calicium sessile 3. marginatum 
Turn. & Borr. Lich. Br. p. 128; Sm. Eng. Fl. v. p. 1388.—Brit. 
Exs.: Leight. n. 226; Cromb. n. 11. 
This species is closely allied to the preceding, but is distinguished by 
the smaller and constantly naked, somewhat scattered apothecia, and by 
its being entirely parasitic. 
Hab. On the thallus of various Pertusarie, on old oaks, in upland 
woods.—Distr. General, though not common, throughout England.—- 
B. M.: Epping Forest, Essex; Shiere, Surrey; St. Leonard’s Forest, 
Sussex ; near Lyndhurst, New Forest, Hants; Oakley Park, near Ciren- 
cester, Gloucestershire ; Hendlip, near Worcester ; Gopsall Wood, Lei- 
cestershire ; Llanforda, Shropshire; Kasby Wood and Ingleby, Cleveland, 
Yorkshire; Leven’s Park, near Kendal, Westmoreland; Teesdale, 
Durham. 
Tribe I. SPH HROPHOREI Nyl. Mém. Soc. Cherb. 
iii. (1855) p. 168; Syn. i. p. 169. 
Thallus vertical, fruticuloso-divided or ramulose, subgloboso- 
incrassate at the apices, within entirely filamentose. Apothecia 
terminal, innate, at first closed, at length with the thalline receptacle 
irregularly lacero-dchiscent ; sporal mass copious, black ; spores 8ne, 
in evanescent thece, simple or 1-septate, spherical or ellipsoid, 
blackish or brown. Spermogones terminal, black or pale. 
This is closely allied to the preceding tribe. Their thalli are no doubt 
very different in form and texture; but the fully developed fructification 
of the Spherophore? is similar to that of the Caterer. 
25. SPHAIROPHO- 
RUS Pers. in Ust. Ann. 
vii. (1794) p. 23. (Sphe- 
vophoron Ach. Meth. 
(1803) p.134.)—Thallus 
ceespitoso - fruticulose, 
branched, smooth, fra- 
gile; medullary layer 
white, woolly ; cortical 
layer corneous, some- 
whatshining. Apothecia - 
situated on the dilated ‘ 
apices of the primary 
axes, paraphyses very 
scanty ; spores covered Fic. 08. 
with a black pigment. Spherophorus coralloides Ach.—a. Vertical section 
Spermogones black with — of an apotbecium (in dry state), x30. 0. Theca 
ointed sterigmata 2nd paraphyses, x330. ¢. Three spores (two of 
short, jointe S which are naked), x 500, d. Vertical section of 
and oblong spermatia. a spermogonium, x30. ¢. Arthrosterigmata 
and spermatia, « 500. 
