1800.] occurring in the Nciglibourliood of Simla. 97 



The aecidium is deeply placed and is not bounded by any peridium, 

 but by a layer of convoluted hyphae. The aecidiospores are given off 

 successively from basidia, but ripe spores do not remain attached to one 

 another in rows as usual. As each spore ripens it is cast off, and the 

 spore below, which up to this time remained in a rudimentary condition, 

 then grows rapidly, forming another ripe spore, and so on. The spores 

 are pale yellow, mostly oval, with an epispore of variable thickness, 

 thickened at one end, and beset with large coarse spines, which are 

 deciduous. The fresh spores measure 43'2 x 25*6/;i on an average, 

 varying from 36 X 28 to 52 X 16/>t. The thickness of the epispore is 

 usually about 4/a, and 6 to 10/x at the thickened end. These spores, 

 like the uredospores, do not germinate readily in water. 



The spermogonia are plentiful, are deeply set, and a tuft of para- 

 physes protrude through the mouth. They measure 145/x in depth, and 

 157 in breadth. 



2. Caeoma Mori, nov. sp. 

 On Morus alha, L. var. 6. serrata. 



This fungus is one of those species situated so nearly between two 

 genera that it is somewhat difficult to decide to which it belongs. On 

 the whole I am inclined to regard it as a species of Gaeoma. 



Curiously enough I only once found it, namely, in November, 1885, 

 and although I have frequently searched for it again I have never suc- 

 ceeded in finding it. Owing to this circumstance my notes of it are 

 very imperfect. 



The aecidia are hypophyllous. Although there is no regular co- 

 herent peridium the outer aecidiospores resemble peridial cells in being 

 colourless and larger than the aecidiospores proper (fig. 6, PI. IV), 

 which are reddish yellow, round or oval, and measuring when fresh 

 from 14/u, in diameter to 20 X 14/x., but on an average 17 X 14/x. The 

 epispore is thick, measuring 2/a. The outer colourless pseudo-peridial 

 cells measured from 19 x 11 to 22 X 12/x,.. J did not observe the 

 germination of the aecidiospores. 



ISOLATED UREDO FORMS. 



Of isolated Uredo forms six are known to me. Among these two 

 are remarkable, namely, those on Vitis himalayana and on Gomjohrena 

 glohosa, the former for forming columnar spore masses, and the latter 

 for producing a curious flocculent mycelium on the surface of water 

 when allowed to germinate there in a moist atmosphere. 



