Fic. 11.—Conidia of H. No. 1: a and b, 
with outer wall cracked open by pres- 
sure, the inner hyaline wall and the pro- 
toplasts emerging; c, another conidium with 
the outer wall crushed by pressure, the two 
protoplasts walled and touching; d, similar 
to c, but with the protoplasts separate; e, 
immersion-lens view of two protoplasts 
within a conidium, showing thickening at 
their point of nearest approach to each 
other; f, a longitudinal microtome-section 
of a conidium from which both sides have 
been cut away; g, a cross-section of a 
conidium showing much clear space between 
the protoplast and the outer wall. 
(Fig. 11). De Bary (9) remarks that the endosporium often shows great 
softness and delicacy but is by no means always thinner than the other 
wall. That the outer conidial wall has no internal ridges, and takes no 
part in forming septa, is shown both by direct observation and by inference 
from the way in which the conidial contents slide, unobstructed, length- 
wise of, and out of, the outer conidial wall. Ravn (91) states that in the 
three species studied by him the walls and septa are very thin, but when 
treated with glycerine, etc., the outer wall becomes prominently thickened, 
