THE LICHENS OF SOUTH LANCASHIRE. 133 
Hab, On half-buried gritstone pebbles in glacial drift on the banks 
of the В. Ribble at Chatburn, March 1913. Type-specimen in herb. 
Travis. 
STAUROTHELE HYMENOGONIA, A. Zahlbr. Оп the mortar of walls; sometimes 
associated with Verrucaria muralis, Ach. Rare. 
Maghull; Brinscall; and near Clitheroe. 
PYRENULACEA, 
ACROCORDIA GEMMATA, Кое. (Verrucaria gemmata, Ach.) On the bark 
of trees in subalpine districts. 
On trees near Clitheroe. 
ACROCORDIA EPIPOLÆA, А. L. Sm. (V. conoidea, Fr.) 
On limestone rocks, Worsaw Hill, Chatburn, March 1915. 
ARTHOPYRENIA ARENISEDA, А. L. Sm. 
On the ground in bare moist * slacks " amongst the sandhills. It has 
been noted at various points in the dunes along the South Lancashire 
coast, from Formby to Birkdale ; and it has also been found by one of 
us on the Cheshire coast near Hoylake, see Repts. Lichen Ex. Club, 
1909-1911. 
This lichen, which is only yet known in the limited area above mentioned, first came 
under observation by опе of us in 1905-1906 ; and specimens were distributed through 
the Lichen Exchange Club of the British Isles in the years 1909 and 1910, It was 
described as a new species by Miss A. Г. Smith in Journ. Bot. (1911), pp. 42-48, 
t. 510. f. 5; see also Mon. Brit. Lichens, ii. 323 & 324. The original description may, 
perhaps, here be conveniently quoted :— 
“Thallus albido-cinereus, continuus, granulosus, leviter furfuraceus. Perithecia 
minuta, nigra, semi-immersa, subglobosa, integra, ostiolo lato notata; paraphysibus 
numerosis, gracilibus, ramosis; ascis elongatis, utrinque angustatis, circa 0:140 mm. 
longis, 0:025 mm. latis; sporis normaliter octonis, elongato-clavatis, sursum latioribus, 
interdum guttulatis, hyalinis, 1-septatis, majusculis, 0:032-37 mm. longis, 0'010 mm. 
latis. 
Ad litora humida arenacea. 
Collected at Formby, Lancashire, by Mr. J. A. Wheldon in spring. The thin grey 
thallus follows the inequalities of the substratum. The scanty algal symbiont, 
Trentepohlia, has the deep yellow colour of the gonidia characteristic of many maritime 
species. The perithecia are few and inconspicuous; the spores resemble in form those 
of A. epidermidis, but they are much larger.” 
This species will be readily found in the localities mentioned, if 
looked for on the right type of ground, but will be sought in vain else- 
where on the dunes. The ground which it favours is in the bare dune- 
valleys and open expanses in the wetter parts of growing or mobile 
