97 
f one and the same fungus—a species of Muco Spores 
grey colour, the mycelium remaining pure white. Forty hours 
from the sowing of the spores, the entire mass of mycelium was 
ed eye; microscopic examination show 
ue to the _innumera rable mature black 
Qu 
an 
= 
°o 
fae 
, 
@® 
ae 
here and there tinged with amber. The temperature ranged 
0 75° y 
The rangia are globose and black at maturity, and the 
surface “fs frosted with a very delicate the of lime crystals. 
e size varies considerably, depending on the substance on 
which the fungus is grown, but the etige greene is 
about 80 », although in many instances more than ge that 
size is so ps The wall of the sporangium is pale steel-grey 
when seen by transmitted light. The large globose or eget. adly 
abelian: pee ella is colourless. The spores are colourless, 
elliptical, mie average 5-6 x 3°5-4 p. 
The sporangia are produced in a racemose or corymbose 
manner on short branchlets, which are often furnished with a 
transverse septum near the point s a ais the main branch, 
are always immersed in the loose weft of superficial 
mycelium, contra rary to what cee in other species of Mucor, 
where the sporangia are ita on elongated sporangiophores. 
The vegetative mycelium immersed in the matrix is very 
abundant, densely beanehod =the thickest portions varying from 
1 in diameter—and expanding at intervals i rregular 
swellings containing reserve material. The thicker branches of 
immerse mycelium often contain large ghly 
refractive substance in their interior. Septa are abundant in the 
mycelium cage alg the matrix, and are by no means rare in 
the aérial portions. 
In addition: 6 the nutritive media already enumerated, the 
u 
er ing a 10 per cen 
and ina mae vilized teen of iotaving vi vegetable matter 
These experiments prove that the fungus is by no means 
circumscribed in its choice of a matrix, and consequently it 
would be unwise, without further knowledge of the possibilities 
of the fungus, to spray its spores on fruit trees, as those spores, 
carried to the ground in the solution, would probably be able to 
develope as a saprophyte on decaying vegetable matter, and the 
resulting spores would be very likely to attack the partly 
matured fruit. 
It remains to state that the fungus attacks and kills cockroaches 
quite as quickly as it does locusts. An exotic species—Periplaneta 
Australasie, abundant in the warm houses in Kew Gardens—was 
experimented upon. Four half-grown specimens were sprinkled 
with water containing the spores ; of the fungus in suspension, and 
