ANALYTICAL KEY. 
XXXI 
stemmed, moss-like evergreens; leaves small, in 
4-16 ranks Lycopodiace.®, 97 
Spores of 2 kinds, large and small ; spore-cases sol- 
itary in the axils of small 4-ranked leaves, or in 
the bases of linear radical leaves. . . Selaginellace^®. 
Subclass II. BRYOPHYTES: with cellular tissue only. 
Spores developed in a capsule, opening by a lid. 
Musci, 98 
