301 



The species of tliis uimhis grow oxdusivcly on Lichans. 

 P. borealis, (Saoc.) 



f.puymatiu h^rcalis, Sacc. Syll. 2236. 



Peritlioeia snuiU, Iilack, *200 // diani., adnate or seiiiii;/ .'rsed, at 

 first sul)glol)ose, then variously wrinkled and, as it Avere, sp. x, open at 

 the apex. Asci eylindric-elavate, with slender, anastoniosely branched 

 (•ronuine)? jKirajihyses. Sporidia 4-('>. iniiseriate, elliptical, constricted 

 in the middle, olitnse ut the ends, with two nuclei, 15-17 x 7-!) //. 



On some sterile lichen thaUiis, CJreenland. 



Collected during the English North Polar Kxp. 1875-70. 



or the Ibllowiiig genera included l>y Winter in the Family /S);/«f^- 

 fdloldcm, no representatives have yet been reported as Ibund in this 

 countiT, as far as we know. 



TI€HOTHECIlM, Flotow. 



In Korber Krypt. Kundc (1H4S) p. igg. 



Perithecia more or less sunk in the matrix, finally ernmpent, snuill, 

 of tolerably hard, horn-like, cai'ltonaceous substance, Idack, with a sim- 

 ply perforated ostiolum. Paraphyscs united in a slimy mass, obscure 

 or wanting. Sporidia 8 or more in an ascus, 1-3-scptate, l)rown (Win- 

 ter, Die Pilze, 11, p. 348.) 



As in the ])rcceding genus, all the species are lichenicolous. 



MULLERELLA, Hepp. 



In MuUer Principes ile Classif, dc Lichens, XVI, Part 2d. 



Perithecia more or less sunk in the matrix, globose, l)lack, jjerfo- 

 rated above. Asci polysporous. Sporidia continuous, brown. Pai'- 

 apliyscs obscure. Licheiucolous. 



LIZONIA, Ces. & De Not. 



Schema Sferiacei p. 41. 



Perithecia .-ubaggregated, ovoid, glalirous, coriaceo-menibrana- 

 ceous, erunij)ent-superficial, ostiolum minute. Asci clavate. Sporidia 

 Iiiseriate, ol)long, often inequilateral, uniseptate, hyaline, becoming 

 darker, rather large. Paraphyscs none. 



Foliicolous fungi, differing from Sphmrella in their sul)coriaceous 

 perithecia crowded-erumpent, and mostly larger sporidia. 



Placed l)y Cooke as a subgenus of Sphmt'ella and by Winter as 

 supplementiuy to the Fam, Cuciwhitavieoi, 



