Yorkshire Naturalists at Thornton Dale 
293 
Peltigera canina Hoffm. Amongst dead mosses. 
Platysma glaucum Nyl. Common on trees and walls. 
Ramalina farinacea Ach. On Scots pine and spruce. 
Evernia furfuracea Fr. Common on walls and trees. 
E. furfuracea var. ceratea Nyl. On wall tops. 
Pavmelia perlata Ach. Trees. 
Parmelia saxatilis f. furfuracea Schaer. 
P. fuliginosa var. laetevirens Nyl. 
Parmelia physodes Ach. and f. labrosa Ach. 
Lecanora Hageni Ach. On aged oaks. 
E. pallida Schaer. On beech. L. parella Ach. 
Pertusaria globulifera Nyl. On aged oaks. P.amara'Nyl. On aged oaks. 
P. lactea Nul. On aged oaks. P. Wulfenii D.C. On aged oaks. 
Acarospora fuscata Nyl. Walls. A. smaragdula Koerb. Walls. 
A. pruinosa Jatta. Aged oaks and mountain elm. 
Cladonia pyxidata Fr. and f. myriccarpa Cromb. Moss-covered stumps. 
C. fimbriata Fr., and var. tubceformis Fr. Moss covered stumps. 
C. gracilis Hoffm., and var. choralis Floerke. Moss covered stumps. 
C. squamosa Hoffm. Amongst dead and living mosses. 
C. macilenta Hoffm. On dead grass and old stumps. 
Lecidia quernea Ash. On aged oaks. 
L. coarctata Nyl., and var. elacista Cromb. Walls. 
L. parasema Ach. Oak and ash. Arthonia lurida Ach. Beech. 
Opegrapha varia Pers. Beech. O. vulgata Ach. Ash. 
Verrucaria hydrela Ach. Stones in stream. 
The portion of Pexton Moor investigated resulted in the following 
additional species being met with : — Cetraria aculeata Fr., in abundance, 
also f. hispida Cromb. and f. acanhtella Nyl. ; Cladonia cervicornis Schaer., 
C. sylvatica Nyl., C. furcata Hoffm., C. uncialis Nyl., C. coccifera Schaer. 
A walk through Dalby Dale to the ‘ Bride Stones,’ then across the 
moor to Crosscliff, subsequently recrossing the moor and descending one 
of the ghylls into Staindale, proved instructive from many standpoints. 
The species noted on the remarkable blocks of grit known as the ‘ Bride 
Stones ’ .were : — 
Evernia furfuracea var. ceratea Nyl. 
Parmelia saxatilis Ach. 
P. omphalodes Ach. 
P. physodes Ach. 
Lecanora polytrops Schaer. 
Pertusaria communis D.C. 
Gyorphorapolyphylla Turn et Bov. 
Cladonia macilenta Hoffm. 
Lecidia confluens Ach. 
Rhizocarpon viridiatrum Koerb. 
R. confervoides D.C. 
R. obscuratum Mass. 
Other species not previously recorded, and noted during this walk, 
were : — 
Collema furvum Ach. On calcareous blocks in the stream. 
Colorina saccata Ach. On the peat. 
Sphaerophorus coralloides Pers. Grit blocks. 
S. coralloides Pers. Grit blocks. 
Usnea hirta Hoffm. On dead Scots pine. 
Hcematomma coccineum Koerb. Grit blocks. 
Bceomycrs rufus D.C. On grit blocks in the ghyll. 
Pcynothelia papillaria Duf. On the peat. 
Cladonia bacillaris Nyl et Cromb. On the peat. 
C. Floerkeana Fr. On the peat. 
Lecidia granulosa Schaer. On the remains of old ' Swiddens.’ 
L. uliginosa Ach. On the peat. 
L. contigua var. platycarpa Fr. On grit blocks. 
L. rivulosa Ach. On grit blocks. 
Mycology (F. A. Mason). — Fungi were collected in three of the areas 
to which reference has been made in Dr. Pearsall’s ecological notes ; the 
Beech -woods, the Ash-Oak woods and the Alder -Willow association and 
adjacent springs at Ellerburn. Additional investigation was made of 
1922 Aug.-Sept. 
