Yorkshire Naturalists at Stamford Bridge. 303 
of the rare Amaurochete fuliginosa on felled pine logs showing 
all gradations of growth from the cream coloured plasmodium 
rising into strawberry-like ethalia turning pink, then crimson, 
eventually to sooty black. These colour transitions have not 
hitherto been noted by writers on these organisms and it is 
pleasing to record this phase in the life history of these strange 
plant-animals. 
BASIDIOMYCETES. ASCOMYCETES. 
. Dasyscypha virginea. 
Amanitopsis fulva. el calvcina. 
Collybta platyphylla. i hvalina. 
» tenecella. Sphaevospora asperior. 
Mycena galericulata. Lachnea scutellata. 
» haematopoda. ie umbrorum. 
Lactarius rufus. Orbilia leucostigma var. xantho- 
Se subdulcis. stigma. 
Russula lepida. Chlovosplenium aervuginosum. 
” mustelina. Mollisia cinerea. 
” cyanoxantha. Bulgaria polymorpha. 
Mavasmius epiphyllus. Exoascus turgidus. 
Lenzites betulina. Hypoxylon cohaereus. 
Pluteus cevvinus. 
Polyporus squamosus. MyYcETozoa. 
» betulinus. Physarum nutans. 
” hispidus. Cratevium minutum. 
” chioneus, Leocarpus vernicosus. 
Fomes annosus. Didymium difforme. 
Polystictus versicolor. ye squamulosum. 
ae abtietinus. Stemonitis fusca. 
ie perennis. Comatricha nigra. 
Pavia collgsa. Enerthenema papillatum. 
; Amaurochaete fuliginosa. 
” Paporaria. Reticularia Lycoperdon. 
Odontia fimbriata. Lycogala epidendrum. 
Thelephora laciniata. Trichia persimilis. 
Steveum hirsutum. PF scabra. 
a sanguinolentum. ” ggg ed 
Hi Tenet oan +e decipiens. 
wyneola auvicula-jude. Bouin. 
Ithyphallus impudicus. Mveuria Gen udata. 
Cyathus striatus. Perichaena corticalis. 
Portia callosa and Hypoxylon cohaerens have each only one 
previous record for Yorkshire. 
CONCHOLOGY.—This Section was represented by Mr. W. 
Denison Roebuck, who writes :—The route was at first up the 
left bank of the Derwent, in division York S.E. Bythinia 
tentaculata was not uncommon in the still reaches of the river 
and a fine example of Acroloxus lacustris was found on a floating 
leaf of Polygonum amphibium. Among Sweet-Flags was 
Succinea putris in abundance, and in the axils of the leaves 
occurred Agriolimax levis and young A. agrestis. In the 
coppices occurred juvenile examples of Helix nemoralis, and 
I913 Aug. I. 
