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THE LICHENS OF SOUTH LANCASHIRE. 118 
CALLOPISMA CITRINUM, Koerb. (Lecanora citrina, Ach.) On the mortar of 
walls ; not common, rarely fruiting. 
Whalley, May 1902; Holme near Burnley ; Speke; between 
Aintree and Ford; walls near Maghull, May 1910; Little Crosby, 
June 1909. Laneshawbridge, Colne, fruiting, //. Robinson ! 
This species shares with Xanthoria parietina and Buellia canescens a great partiality 
for villages and farms, or garden walls near habitations. 
CALLOPISMA ERYTHRELLUM, Nyl. 
Very sparingly, on sandstone rocks, Hale Point, July 1910; in poor 
condition, on shady limestone rocks by the road between Worston and 
Chatburn, March 1913 ; on the flat surface of a limestone block in a wall 
by Ings Beck, Chatburn, June 1914 ; on a limestone gate-post between 
Chatburn and Clitheroe, June 1914. | 
CALLOPISMA FERRUGINEUM, Nyl., var. FESTIVUM, Nyl. On siliceous rocks and 
walls. Very rare. 
Smithies Bridge, near Chatburn, May 1910; sparingly on sandstone 
rock, Hale Point, July 1910. 
CALLOPISMA PYRACEUM, Sydow. 
Abundantly on mortar and on the stonework of bridges on the 
Cheshire Lines Railway, near Woodvale, Aug. 1914. 
[HÆMATOMMA VENTOSUM, Massal. (Lecanora ventosa, Ach.) 
Only one old record is known to us, and the present existence of this 
species in our area is very doubtful. 
Walls at Aigburth, and near Roby, Liverpool, F. P. Мата, Lpool 
Nat. Scrap-Book, p. 191.) 
In West Lancashire, where the conditions are more favourable to its 
growth, it does not descend below 500 ft., and has a distinctly montane 
range. 
LECANORA IRRUBATA, Nyl. (L. rupestris, Sm.) 
On calcareous rocks. Frequent in the limestone area in the Ribble 
Valley about Clitheroe and Chatburn. 
On limestone rocks by Chatburn Station, 1907, 4. A. Dallman $ 
J. A. И’.; near Whalley, Мау 1909; on exposed limestone rocks, 
Chatburn, May 1910 ; on soft, black, calcareous shaly rocks by the side 
of the R. Ribble, Chatburn, June 1911 ; on the same kind of substratum 
in Horrocksford Quarries, Clitheroe, March 1918; on walls by the road 
between Chatburn and Downham, March 1913. 
LECANORA CIRCINATA, Ach. 
On the masonry of Brungerly Bridge, near Clitheroe, June 8, 1912. 
