ELVELLACEI. 373 



253. PSILOPEZIA, B. 



Indeterminate, imraarginatc, agglutinate. Hyraenium al- 

 ways exposed. 

 1. Babingtonii, B. (no. 554). On rotten wood. 



254. PATELLARIA, Fr. 



Receptacle patellneform, margined, always open, llymenium 

 even, subpersistent, but dusty from the breaking up of the asci. 

 Asci fixed. 



1. atrata, Fr. On dead wood. 



2. rhabarbarina, B. (no. 89). On dead bramble.* 



3. citrina, B. and B?: (no. 583). On rose-twigs, in a runnirig stream. 



4. clavispora, B. and Br. {no. 774). On privet. 



5. livida, B. and Br. {no. 775). On fallen fir-trees. 



6. discolor, Mont. On fallen branches. 



255. SPHINCTRINA, Fr. 



Excipulum almost horny, naked, pierced with a narrow, 

 quite entire mouth. Disc at length dusted with the sporidia. 

 1. turbinata, Fr. ; Soio. t.SSQ.f. 1. On Pert/tsaria. 



256. LAQUEARIA, Fr. 



Disc waxy, persistent, without any hypothecium, but covered 

 with a horny, coriaceous, dimidiate, superior, deciduous exci^ 

 pulum. Mouth contracted. 



1. spliperalis, Fr. Stictis sphajralis, Si/sL Mi/c. On ash. 



257. TYMPANIS, Tode. 



Receptacle margined, cyathiform, liorny. llymenium at 

 first veiled, then breaking up. 



* Tliis belongs to Fries' genus Lacknella, but as he himself is imcertain as 

 to its immediate affinities, I think it better to leave it in Patellaria. 



