HORSE -HAIR BLIGHTS. 
67 
sporis globosis, 3-3*5 ^ diam., hyalinis. Ad ramos putres, 
Kamerun Afr.” The decurrent gills and globose spores 
distinguish this species from M. equicrinis, if the description 
is correct. 
It will be seen that in none of these species are the gills said 
to be united into a collar round the stalk. Therefore, on that 
character alone, it might be decided that none of them can be 
identical with Marasmius equicrinis. But, on the other hand, 
the original description of M. equicrinis does not mention the 
collar, and it is quite probable that the descriptions of the 
other species may be similarly defective. Exception might be 
made in the case of Marasmius trichorrhizus, which has 
presumably been examined in the fresh state by several 
mycologists. 
Addendum. 
The Xylaria figured on Plate VII. was included under the 
belief that it was the fructification of the undetermined horse- 
hair blight found at Hakgala. This, however, has not been 
established. 
This species is common at Hakgala on dead leaves in the 
jungle. It has a black rhizomorphoid mycelium, which 
usually runs in short lengths from one leaf to another and 
fastens them together. 
The Xylaria is produced on the dead leaves, not necessarily 
in direct connection with the black rhizomorphs. As a rule, 
several occur together on a single leaf. It varies from 1 to 
4 centimetres in height. The stalk is about 0*5 mm. in 
diameter at the base, smooth, shining, longitudinally striate. 
The clava is from 5 to 15 millimetres long and about 
1 millimetre in diameter ; it is either continuous with 
strongly projecting perithecia, or interrupted with scattered 
perithecia. Above the perithecia the stroma is attenuated 
into a hair-like tip of varying length, sometimes 2 to 3 
centimetres ; this sterile tip may be simple or forked. In 
some cases growth continues at the tip, which ultimately 
becomes united to another dead leaf ; the clava then resembles 
a group of perithecia on a long strand of mycelium. One 
such example is 20 centimetres in length, and bears sixteen 
perithecia scattered over a length of 14 millimetres. 
