73 
Verrucaria epidermidis, Ach. Leight. Brit. Ang. Lich. p. 17, fig. 
3. On the thin epidermis of the birch and other trees, Lounsdale ; 
Ayton ; near Castleton. 
Verrucaria epidermidis, @. analepta, Hook. HE. Bot. 1848. On 
oak-bark, Cliffrigg ; Airyholme Wood. 
Verrucaria fusiformis, Leight. Leight. Brit. Ang. Lich. p. 18, fig, 
2. On the bark of young ash-trees, top of Cliffrigg, rare. 
Verrucaria gemmata, Ach. E. Bot. Suppl. 2617, fig. 2. Trunks 
of trees, Airyholme Wood, rare. 
Verrucaria umbrina, Ach. EK. Bot. 1499. Rocks and stones near 
Ayton, Carlton, and Stokesley. 
Verrucaria mutabilis, Borr. MSS. Leight. Brit. Ang. Lich. p. 24, 
fig. 3. On rocks, Kildale and near Ayton. Several states of this 
variable species may be met with in Cleveland, including the form 
published in E. Bot. as acrotella. 
Verrucaria immersa, Hoftm. Leight. Brit. Ang. Lich. p. 25, fig. 
2. On basaltic rocks, Lanbraugh Rigg, rare. 
Verrucaria rupestris, Ach. Leight. Brit. Angl. Lich. p. 25, fig. 4. 
On sandstone rocks, Newton Wood. 
Pyrenothea leucocephala, Fries. E. Bot. Suppl. 2642, fig. 2. On 
the trunks of old trees (with patellula), Stogdale, Hob-hole, and 
Oggeray Gill. With us a very abundant species ! 
Pyrenothea vermicellifera, Kunz. Leight. fasc. 3, 102. On the 
bark of ash, holly, and maple, Ayton; Kildale; Mulgrave woods, near 
Whitby. 
Strigula Babingtonii, Berk. Leight. Brit. Ang. Lich. p. 30, fig. 4. 
On laurel-leaves, Ormesby. 
Arthonia spadicea, Leight. Leight. fasc. 3, 97. On hazel, Airy- 
holme Wood ; Newton Wood ; Cliffrigg. 
Arthonia lucida, Ach. E. Bot. Suppl. 2692, fig. 2. On the bark 
of old oaks, Oggeray Gill; Newtown Wood. Rather rare. 
Arthonia Swartziana, Ach. E. Bot. 2079. On the smooth bark 
of trees, Airyholme Wood; Cliffrigg ; Mulgrave woods, near Whitby. 
Opegrapha varia, Pers. var. notha, Ach. KE. Bot. 1890. On the 
bark of old trees near Guisbro’; Easby Wood; near Stokesley. 
Opegrapha saxatilis, DC. E. Bot. 1790. Sandstone rocks, New- 
ton Wood ; Esk banks, near Egton. 
Opegrapha rupestris, Pers. “ Named by the Rev. W. A. Leighton, 
of Luciefield, Shrewsbury.” Sandstone rocks, Newton Wood, but 
very rare. 
Opegrapha herpetica, var. subocellata, Ach., subvar. simplex, 
WO he: We L 
