Royal Microscopical Society. 273 



Traveller's Joy) is common on the hills and in the valleys, and 

 sometimes a beautiful orange-red fungus may be observed on the 

 under surface of the leaves. This fungus on the fresh leaf emitted 

 an odious smell — the smell of a recently killed bug — and was 

 quite unbearable, but now both the red colour and the smell have 

 disappeared. When the leaf is examined with a low power the 

 spores are found to be arranged in little button-like clusters 

 (Fig. 5) firmly packed side by side and of yellow colour (Fig. 6), 

 and growing from the cellular dermis of the leaf almost at right 

 angles. [IJredo clemcdidis* Berk.] 



Fig. 7 shows the appearance of the leaf of a species of mimosa 

 with a fungus on the under surface, and Fig. 8 the spores with 

 three sporidia above. [ TJredo punctoidea, Cooke.] 



I found also a leaf of an unknown shrub with rust spots irregu- 

 larly distributed on the under surface. The spores are many-celled, 

 irregular, elongated, yellowish, and easily separate as a yellowish- 

 brown dust without any traces of mycelium, vide Fig. 9. [This is 

 a SeptotricJium formerly included with fungi, but now discarded 

 as a diseased condition of the tissues. — M. C. C] 



On the leaf of a species of willow, I observed on the upper and 

 under surface a number of black spots, which were easily scraped 

 off. On microscopical examination, these black spots were found to 

 be made up of a number of bodies like that depicted in Fig. 10. 

 They consist of a circular, yellow-coloured matrix, with an interior 

 dark-brown-coloured nucleus, made up of fine mycelium, and inter- 

 spersed throughout the latter there are numerous small cells. 

 Outside the central nucleus, and arranged in a radiating manner, 

 there is a number of jet black spine-shaped processes, apparently 

 very brittle, as they are easily broken by pressure under the covering 

 glass. [No fruit : probably a Volutellal] 



Fig. 12 represents the appearance of a portion of the under 

 surface of a leaf resembling the Rumex aeetosa, on which raised 

 circular reddish-brown spots of fungi are observed. The spores 

 (Puccinia) are shown in Fig. 13, magnified, the cells being nearly 

 separate, and attached to long, tapering peduncles. [^Puccinia 

 dissiliens, Cooke.] 



On the leaf of the common dock, which differs in no way from 

 that seen in this country, the upper and lower surfaces were studded 

 with rusty minute fungoid spots, which appear to belong to the 

 order ^cidiacei. The spores are circular, tuberculated, and of a 

 yellowish colour. {^Mcidium ruhellum, P.] 



Fig. 14 represents the appearance of a piece of the under 

 surface of the leaf of a cruciferous plant, very common in the 



* On the leaf I find Uredo clematidis, but not the structure indicated in the 

 drawino^. If this is manifest in its fresh state, then the Uredo would be a 

 Coleospormm. — [M. C. C] 



