210 THE JOURNAL OF BOTANY 
lobes, recalling, in this feature, C. Trevelyant Rost. e name 
Chondriadiena asteroides is ih to the species on account of the 
last-mentioned striking characte 
Puysarum Gyrosum Rost. ae g.2). From the examination of 
the ene of this species in the Strassburg collection, we were led to 
suppose that it was an ecorticate form of Luligo septica. The 
is 
those of fF’. septica, aa measure 8- 10 p dia There are on the 
same leaf the remains of several ee eer ethalia. We have 
ronson 1898. The ror ubciigs agree in all respects except 
that the spores of the former measure 6-7 », and those of the latter 
9-10 p. e shape of the «thalia reminds one of small confluent 
growths of Physarum bivalve Pers. They are grey in colour, an 
are seated on a pinkish hypothallus, as in the Stra — Hees ; 
but in the latter the pink colour extends to some extent into the 
sporangium-walls. Dr. Jahn is of opinion that Physarum g ei 
; a distinct species ; he says it is not of unfrequent occurrence 10 
the hothouses in the Berlin Gardens, creeping over the green leaves, 
it thereby doing injury to the young plants in the border. Fuligo 
seplica also occurs in one of its usual forms in the same hothouses. 
The fact that the Berlin sR ECR EE of P. gyrosum were found in 
a tothouse rae gt suggest that its special characters are due to 
the influence of the warm and moist atmosphere; but among 4 
selsaelbey: interesting series of specimens tebe ‘So uth America 
submitted to y alin, he sends one of almost a 
similar form to the Berlin Serene mente by Dr. A. Moller a 
lumenau, Brazil, in March, 1898. It has the same windin 
: 
compressed and confluent sporangia, sieiate a small ethalium, 
0:2-0'3 mm. in width, seated on a pinkish or dull red hypothallus 
on a green - leaf; the capillitium has the same character 
with white lime-knots, a nd the spores measure 8-9 » diam. The 
difference in the size of nh spores in the two ene by P rof. 
Magnus is striking, but a similar difference is met with in Ff. 
septica, to which P. gyrosum is undoubtedly see ; allied but we 
agree with Dr. Jahn in his conclusion, that these — con- 
firm the integrity of P. gyrosum as a distinct species 
