112 MESSRS. J. А. WHELDON AND W. G. TRAVIS ON 
РнузстА СЖзїА, Nyl. Very rare. Sterile. 
On limestone rocks near Chatburn, March 1907, А. А. Dallman & 
J. A. W.; on kerbstones of gritstone or sandstone on the roadside 
between Aintree and Maghull, Oct. 1910. 
LECANORACEÆ. 
[Psoroma нурмовом, Hoffm. 
Shaly banks, Thievely Scouts, Fl. T'odmorden.] 
No later record, and probably now extinct. 
SQUAMARIA SAXICOLA, Poll. Very rare. Sterile. 
(On the wall opposite Greenbank Road, Smithdown Lane, Liverpool), 
F. P. Marrat, Hep. & Lichens of Lpool ; limestone rocks near Chatburn, 
1907, A. A. Dallman & J. A. W. 
PLacopium мововом, DC. On limestone rocks aud walls. Not rare in the 
Ribble Valley. 
Chatburn ; near Downham, 4. Wilson; Worsaw Hill, Chatburn. 
PLACODIUM TEGULARIS, Ehrh. Common, and fruiting well, on limestone 
walls by roadsides about Chatburn and Downham. 
PLACODIUM DISSIDENS, Nyl. 
Several small patches on the gritstone masonry of two bridges on the 
Cheshire Lines Railway near Woodvale Station, Aug. 1914. 
CALLOPISMA LACINIOSUM, А. L. Sm. (Lecanora laciniosa, Nyl.) Very rare. 
Sterile. 
On the bark of an ash-tree by the R. Ribble, near Clitheroe, June 8, 
1912. 
CALLOPISMA VITELLINUM, Sydow. On siliceous rocks and walls; not un- 
common, and occurring in all but the most smoke-affected districts. 
Maghull; kerbstones of roadsides between Aintree and Ford, Oct. 
1907 ; in an old sandstone quarry, Little Crosby, June 1909 ; on the 
coping of a culvert near Longton, Dec. 1911 ; on walls, Billinge Hill ; 
near Rivington, alt. 500 ft., June 1912, А. Wilson ; walls of Huntroyde 
Demesne, Padiham ; in fine fruit on walls by the Ribble near Clitheroe, 
June 1912; on the sea-wall at Dingle Point, Liverpool, March 1914 ; 
on sandstone on a colliery refuse-heap near Rainford, 
Var. AURELLUM, Ach, On a wall by the shore, Birkdale, June 14, 
1912. 
CALLOPISMA EPIXANTHUM, A. L. Sm. 
On a wall by the shore, at Birkdale, June 14, 1912, fruiting ; asso- 
ciated with the next preceding species. 
