130 MESSRS. J. A. WHELDON AND W. б. TRAVIS ON 
RHIZOCARPON PETRÆUM, Massal. (Lecidea concentrica, Leight.) 
On rocks and walls, both calcareous and siliceous. Rare. (On a 
wall between Broad Green and Roby), F. Р. Marrat; rocks in a gully, 
N.W. side of Pendle Hill, alt. circa 700 ft., June 1911; walls of Coal 
Measure sandstone, by Pimbo Bushes, Billinge Hill, May 18, 1912 ; on 
gritstone rocks and boulders in stream, Ogden Clough, Pendle Hill, 
Aug. 1918; оп clay ironstone nodules ‘оп an old colliery refuse-heap, 
Reeds Moss, Rainford, July 1914. 
Var. EXCENTRICUM, А. L. Sm. On limestone and on calcite crystals, 
Bold Venture Quarry, Chatburn, Aug. 1913. 
RHIZOCARPON CONFERVOIDES, DC. (Lecidea petrwa, Tayl.) 
On shaly, calcareous rocks in a gully, N.W. side of Pendle Hill, alt. 
700 ft., June 1911; on sandstone blocks at the base of the landmark, 
Freshfield, 1913 ; Ё. coracinum, Flot., on the horizontal surfaces of Coal- 
Measure sandstone, Greens Clough, near Todmorden, May 1912. 
GRAPHIDACEZE. 
OPEGRAPHA SAXICOLA, Ach. 
Damp, shady limestone rocks, Worsaw Hill, near Chatburn, Sept. 
1910; limestone wall near Worston, March 1913. 
[ GRAPHIS SCRIPTA, Ach. 
Forest of Rossendale, А. Stansfield. | 
Extinct. 
DERMATOCARPACEZE. 
DERMATOCARPON LACHNEUM, А. L. Sm. (Ændocarpon rufescens, Ach.) 
On earth among limestone rocks. Near Clitheroe, 1906 ; near 
Chatburn, 1907, А. A. Dallman $ J. А. W. ; on top of Worsaw Hill, 
Chatburn, April 1913. 
VERRUCARIACEZÆX, 
VERRUCARIA MAURA, Wahl. 
Very sparingly, on sandstone rocks at tide-level, Hale Point, May 24, 
1913. 
VERRUCARIA AQUATILIS, Mudd. 
On stones in the bed of В. Ribble, near Clitheroe, June 8, 1912. 
