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145 
NOTES ON MYCETOZOA. 
By Arruur Lister, F.R.S. 
(PuatEe 398.) 
Tue following notes refer to some interesting species of Mycetozoa 
that have come under the notice of myself and of my daughter, 
Miss G. Lister, during the last twelve months. 
Bapuamia uTricutaris Berk. In the years 1877, 1887, and 
1898 Stereum hirsutum grew on logs of oak, beech, and horn ‘bea 
in greater luxuriance than in the intervening years fe utricularis 
feeds mainly on that fungus, and was equally abundant at those 
periods, but was not generally common in other season 
I have maintained cultivations of plasmodium rare a » gathering 
in hades 1887, for twelve years, and during that me have 
allowed some to dry into sclerotium and some to ptolan ce sporangia. 
In these ee the spores have shown considerable variation in 
the looseness or compactness of the clusters they form, but in all 
Oo taniae consisted of about 7 to 10 spores. In the 
had the 25, such we 
usually find in B, hyalina. In December, 1898, we gathered plas- 
modium and ‘ae sporangia with spores in large clusters, from a 
felled beech with a rich growth of Stereum. A cultivation was 
made from the plasmodium, which, as it increased in quantity, was 
divided into several colonies. Towards the end of February, 1899, 
three of these cha anged to fruit; in two the spores were in large 
clusters of 17 to 25, in the third, consisting of from 8000 to 4000 
sporangia, the spores in all examined were in small loose clusters of 
10. The number of spores in a sinister, hitherto given in 
the books as a specific character, is thus proved to be inconstant. 
: rA Racib. On April 14th, 1898, Mr. J. Saunders 
gathered foe species on straw, at Nether Crawley, Beds, This i 
the fourth British locality in which it has been found. 
B. rusteinosa Rost. The large form with globose sporangia, 
obtained at Llan-y-Mawddwy, North Wales, in Bepteniber, 1895,* 
Fla in a. in the same situation on a mossy rock in 
Septem 98. 
B. rotucota List. During some weeks in October, 1898, this 
species was in great abundance on the open meadow-land in Wan- 
stead Park, Essex; patches of yellow plasmodium, and sporangia 
in all stages of growth were scattered over an area of about 100 
square yards; they were mostly on tufts of dead Aira pracoa; it 
was also found in large quantity on dead leaves, at the spot where 
it was first obtained in September, 1896,} and in other parts of the 
park. The sporangia were — sessile or on slender buff-coloured 
ine from 0°2 to 0-6 mm. lon 
* Journ. Bot, 1897,210. ‘Ibid. 209: 
Journat or Borany.—Vot. 87. (Apri, 1899.] L 
