74 
Leight. “Named by the Rev. W. A. Leighton.” ‘On the bark of 
ash-trees, Easby Wood, Airyholme Wood, Cliffrigg, &c. | 
Graphis scripta, Ach., var. flexuosa, Leight. Leight. fasc. 1, 18. 
On the bark of ash-trees, Airyholme Wood; Mulgrave woods, near 
Whitby. 
Graphis seripta, Ach., var. divaricata, Leight. On hazel, Airy- 
holme Wood. 
Aulacographa elegans, Leight. E. Bot. 1812. On the smooth 
bark of trees, Easby Wood, Baysdale, and Stogdale. 
Platygramma Hutchinsie, Leight. Leight. fase. 4, 130. This 
species I first detected, rather sparingly, on rocks in Newton Wood, 
in 1852. Since then I have met with it in abundance on rocks in 
the Beech-bank, Kildale. | 
Biatora mixta, Fries. E. Bot. 1735. On the bark of old oaks, 
Airyholme Wood; Cliffrig; Esk banks, near Whitby. 
Biatora preusnea, Leight. Leight. fase. 390. On trunks of trees, 
Airyholme Wood; Easby Wood; Mulgrave woods, near Whitby. 
Biatora uliginosa, Fries. E. Bot. 1466. Margins of the moor, 
Baysdale ; sandy places on Eston Moor. 
Biatora muscorum, Leight. E. Bot. 2217. On mosses and old 
walls, Kildale; Eston Moor; Esk bank, near Leatholme Bridge. 
Biatora quernea, Fries. E. Bot. 485. On the rugged bark of old 
oaks, Easby Wood; Guisbro’ Spa Wood; Bridle Gill, near Rose- 
berry. 
Biatora decolorans, Fries. E. Bot. 1185. On the ground, high 
part of Baysdale ; near West House, Kildale. 
Biatora aurantiaca. EK. Bot. 948. Sandstone rocks, Newton 
Wood ; walls near Ayton. 
Biatora aurantiaca, var. flavo-virescens, Scher. Leight. fasc. 4, 
119. Calcareous rocks, Broughton bank, rare. 
Biatora aurantiaca, var. irrubata. HE. Bot. 2245. Lecidea irru- 
bata, Ach.? Walls at Ingleby, rather rare. 
Biatora aurantiaca, var. erythrella, Leight. HE. Bot. 1993. Bay 
saltic rocks, Lanbraugh Rigg; Cliffrigg. 
Biatora vernalis, Leight. E. Bot. 845. On the bark of old elms, 
Easby Wood; Airyholme Wood; Esk bank, near Whitby. 
Parmelia calcarea, Fries. KE. Bot. 820. On rocks, Buck bank, 
Kildale ; Broughton bank. 
Parmelia scruposa, Fries. E. Bot. 266. On walls and rocks, 
Lanbraugh Rigg; near West House. 
