134 
MESSRS, J. А. WHELDON AND W. G, TRAVIS ON 
dunes, where the soil is permanently moist. The surface of this bare, 
damp soil rapidly becomes crusted over by the deposition оЁ fine 
sedimentary matter and the growth of alge, and is soon occupied by 
small mosses and creeping hepaties. It is whilst the ground is in this 
condition that Arthopyrenia areniseda occurs, and in situ, when moist, the 
lichen resembles a dirty-white incrustation on the soil, and, when dry, 
looks much like a greyish efflorescence. 
It has been found fruiting freely on a few occasions ; but usually the 
perithecia are scarce and require careful search. Spores have been 
found ranging up to 45 x 15 p. 
[ARTHOPYRENIA EPIDERMIDIS, Th. Fr. 
Netherton, Viet. Hist. Lanes. p. 85.] Extinct. 
VI. Lisr or PunLicATIONS, MSS., AND HERBARIA QUOTED, 
. BvckrEv, Dr. 
MS. (circa 1844), in the possession of Mr. J. С. Healey, Rochdale, 
entitled * Habitats of Plants found in the neighbourhood of 
Rochdale.” 
. COHEN, J. B., and А. ©. Ruston. 
(a) “ Soot, its character and composition,” in Journ. Soc. Chem. Ind. 
xxx. (1911) pp. 1360-4. 
(^) “The Nature and Effect of Air Pollution by Smoke,” in ‘Nature,’ 
lxxxi. (1909) pp. 468-9. 
CROMBIE, J. М. 
А Monograph of Lichens found in Britain, ete. Part 1 (1894). 
Crump, W. B., and C. CRossLAND. 
The Flora of Halifax. 1904. (First published serially in the 
‘ Halifax Naturalist,’ 1896-1904.) 
DirLENIUS, J. J. 
Historia Muscorum. (1741.) 
FISHER, Н. 
* Botany," in Victoria History of Lancashire. (1906.) 
. GRINDON, Leo Н. 
The Manchester Flora: A Descriptive List of Plants growing wild 
within eighteen miles of Manchester. (1859.) 
Horwoop, A. В. | 
А Hand-List of the Lichens of Great Britain, Ireland, and the 
Channel Islands. (1918.) 
. Less, F. A. 
The Flora of West Yorkshire. (1888.) 
