TYPES OF CRYPTOGAMS; THALLOPHYTES 223 
(0) The delicate threads which rise at intervals from the mycelium 
and are terminated by small globular objects. These little spheres 
are spore-cases. Compare some of the spore-cases with each other 
and notice what change of color marks their coming to maturity. 
286. Examination with the Microscope. — Sketch a portion of the 
untouched surface of the mold as seen (opaque) with a two-inch 
objective, and then compare with Fig. 158. 
Wet a bit of the mold, first with alcohol and then with water. 
Examine in water with the half-inch objective, and sketch a little of 
SS 
Fie. 158. Unicellular Mycelium of a Mold (Mucor Mucedo), sprung 
from a Single Spore. 
a, 6, and c, branches for the production of spore-cases, showing various 
stages of maturity. (Considerably magnified.) 
the mycelium, some of the spore-cases, and the thread-like stalks on 
which they are borne. Are these stalks and the mycelium filaments 
solid or tubular? Are they one-celled or several-celled ? 
Mount some of the mature spore-cases in water, examine them 
with the highest obtainable power, and sketch the escaping spores. 
