Crossland : 2Vew and Critical British Fungi. 



7 



Thielavia. Zoph. in Verhand. Bot. Ver. Brandens. 1876, p. 10 1. 



Thielavia Soppittii sp. nov. Perithecia sparsa vel subgre- 

 garia, superficialia, astoma, subglobosa, rufo-brunnea, fragili- 

 membrahacea, 250 ,u alta ; asci ellipsoidei vel ovati, evanescent!, 

 56-60 x 35 [x, octospori ; sporae inordinatas, subellipsoideae, 

 inajquilateralae, subinde plano-convexae, episporio crassae e hya- 

 linae flavidas, dein opaco-brunneae, intus granulosa?, 28-30 x 16 /x. 



Hab. — Near the base of decaying" stems of Carduus palustris. 

 Norland, near Halifax, Nov. 1899. Coll. H. T. Soppitt. 



Sometimes the perithecia are close together in little groups, 

 or individuals may be widely separated ; when fresh red-brown, 

 darker when dry. The asci are completely filled with the eight 

 spores. Longitudinal optical sections of moving spores are 

 seen to change from subplano-convex to elliptical. Did not 

 observe any mycelial bed, or conidia-bearing hyphge in con- 

 nection with the perithecia. 



Aleuria albida Gillett, Discom., pag. 36 cum icone; Acetabula 

 albida Sacc, Syll. VIII. n. 194. 



Hab. — Warehouse yard, Halifax, June 1895 5 an< ^ Sept. 

 1896. Coll. H. T. Soppitt. 



No asci or spore dimensions are given in Gillett's original 

 description. The following notes were taken while examining 

 freshly-collected specimens : — 



Ascophores 2-3 cm. diam., disc concave, stem short, even, 

 margin spreading, fleshy-cartilaginous (not fragile), pale wax 

 yellow, exterior albo-furfuraceous ; asci cylindrical, apex sub- 

 truncate, 200-220x9-10 /x, spores occupying less than half the 

 space when mature, eight in number, obliquely uniseriate, elliptic, 

 hyaline, smooth, indistinctly centri-nucleate, 10-12 x 7-8 /x ; para- 

 physes linear or apex slightly swollen, septate, longer than the 

 asci. 



Our figures of the ascophores were compared with those of 

 Gillett at the Kew Herbarium, April 1899, and were found to 

 agree in all respects, with the exception of the stem not being 

 costate ; Gillett's are. The white scurf on the exterior consists 

 of little heaps of loose, subglobose, thick-walled, detached cells 

 16-24 /x diam. Excipulum parenchymatous. 



Mollisia betulicola (Fuckel) Rehm. Rabenh. Krypt. Flora, Dis- 

 com. n. 5036, p. 538; Pyrenopeziza betulicola Fuckel, 

 Symb. Myc, p. 294; Sacc. Syll. VIII. n. 1507; Calloria 

 Winteri Kunze, Fungi sel. exs n. 283. 

 Hab.— On decaying birch leaves. Hebden Bridge, June 

 1899. Coll. James Needham. 



1900 January 3. 



