238 ELEMENTS OF BOTANY. 
Pry off this lid, remove some of the mass of spores from the interior 
of the urn, observe their color as seen in bulk through the magnifying 
glass, then mount in water, examine with the highest obtainable power 
of the microscope and sketch them. These spores, if sown on moist 
earth, will each develop into a slender, branched organism, consisting, 
like pondscum, of single rows of cells, Fig. 206, called the protonema. 
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Fic. 205. — Longitudinal Section of the Summit of a very Small Antheridium- 
Bearing Plant of Funaria hygrometrica, a Moss. 
a, young antheridium ; }, nearly mature antheridium ; c, appendages growing among 
the antheridia; d, leaves cut through the midrib; e, leaves cut through the 
blade. (Magnified 300 diameters.) 
