BRITISH PYRENOMYCETES. 
121 
E. aspera, Nice., Sacc. Syll. 620. 
On branches. Queen’s Cottage, Kew. 
E. maura, Fr., Sacc. Syll. 627. 
On dead wood. Highgate. 
E. spinosa. Fers., Sacc. Syll. 635 ; Hdbk. 2399. 
On branches. Wingfield Manor, Dinmore, Eltham, 
Scarboro’. 
** Ostiola not sulcate. 
E. lata, Pers ., Sacc. Syll. 637 ; Hdbk. 2397. 
On ivy. Queen’s Cottage Kew, Ringmer, Pentrich, 
Shrewsbury. Common. 
E. leioplaca, Fr., Sacc. Syll. 638 ; Hdbk. 2400. 
On decorticated branches. Hampstead, King’s Cliffe. 
E. scabrosa, Bull., Sacc. Syll. 640 ; Hdbk. 2401. 
Inside a hollow elm. Shropshire. On maple. Lynn. 
E. prorumpens, Wallr., Sacc. Syll. 642. 
On Sorbus aucuparia. King’s Cliffe. 
E. flavo-virens, Tul., Sacc. Syll. 643 ; Hdbk. 2398. 
On wood and branches. Common. 
E. rhodi, Nke ., Sacc. Syll. 65 2 ; Hdbk. 2402. 
On dead rose stems. Shere. 
E. ulicis (Fr.), Berk., Sacc. Syll. 668. 
On furze. Langridge, Penzance. 
NEW BRITISH ALGM. 
A few months ago some quartz pebbles taken out of the river 
Poulter, which is a tributary of the Idle, near Retford, in Notting- 
hamshire, were sent to me to know what was the curious red 
lichen-like stain closely encrusting them, and bearing a remarkable 
resemblance to huge drops of clotted blood. If they had been 
taken from the sea shore, or its immediate neighbourhood, there 
would have been no difficulty in determining the red spots to be 
Hildenbrantia rubra, but being from a fresh water habitat where 
they cover the whole bed of the stream for hundreds of yards, and 
at a considerable distance from the sea, and no Fresh Water 
Hildenbrantia being mentioned in Cooke’s “ Fresh Water Algae,” it 
required Mr. Wm. Archer, of Dublin, to whom I submitted the 
specimens, to point out that the plant is Hildenbrantia rivularis , 
Lieber (Rabenhorst’s “ Flora Europaea Algarum,” p. 408), a 
Fresh Water Algae common throughout Europe, but not, that I 
am aware of, hitherto recorded from the British Isles. 
Since making this discovery, I have looked over my collection 
of uncertain and unexamined Algae, and am pleased to have found 
the same plant on a large pebble which I gathered a few years ago 
from the shore of Ram’s Island, in Lough Neagh, Co. Antrim ; 
and on a piece of rock which I chipped off the bed of a little 
streamlet in the wood at Rorstreva, Co. Down. 
H. W. Lett, M.A. 
