106 MICROSCOPIC FUNGI. 



the discovery of three specimens of a large Boletus 

 (B. eyanescens) * not found, to our knowledge, since 

 the days of Sibthorpe, was further enriched by a 

 species of Trichobasis, new to Britain, and apparently 

 uncommon on the Continent. This rust was found 

 on the leaves of the " grass of Parnassus " (Par- 

 nassia palustris) on a narrow strip of marsh near 

 Irstead church. It was sought in vain elsewhere. 

 The leaves were scarcely changed in appearance, 

 except by the presence of the pustules. There were 

 no discoloured spots, but the pustules appeared 

 sometimes plentifully, more often scattered, on both 

 surfaces of the leaves : they were small, of a bright 

 brown, with oval spores ; the latter were, in their 

 early stages, shortly stalked. We have called this 

 species Trichobasis Parnassice, It is probably the 

 same as published by Westendorp in his " Herbier 

 Cryptogamique Beige" as Uredo Parnassice; at any 

 rate, such was the opinion of the late Mons. 

 Westendorp himself. It is certainly a Trichobasis, 

 and not an Uredo, according to the present limita- 

 tion of the latter genus. 



Although the evidence against the retention of 

 the species of Lecythea (as the genus is named) 

 amongst Fungi as true species, on the ground of 



* At the time, these were believed to be the true Boletus 

 eyanescens, but, since then, specimens of undoubted B. eyanescens 

 have been met with in Britain, and ours are considered a some- 

 what unusual form of a rather common species. . 



