the Anatomy of the Genus Selaginella , Spr. 143 
directed lobes, one or both of which is frequently furcate. The 
ligular face consists of wavy bordered cells more elongated than in 
S. Braunii, without stomata, whilst the aligular face, composed of 
similar cells, bears stomata over the midrib, often sclerotic (Fig. 7). 
The dorsal leaf is ovate, and has a strongly sclerotic margin with 
elongated spiny apex. On the inner side there is a narrow basal lobe 
projecting backwards along the stem, on the outside the lobe is three 
or four times as broad. All the cells are warty (as are those of the 
ventral leaf also). Stomata occur on both faces. 
Section. In section the ligular and aligular epidermal cells are seen 
to be strongly cuticularized and warty (Fig. 25). Beneath the ligular 
epidermis (of the ventral leaf) there occurs a well-marked palisade- 
layer of narrow deep cells, followed by a reticulate mesophyll resting 
on the aligular epidermis. At the margins the cells (Fig. 24) are seen 
to be entirely sclerotic, without intercellular spaces. 
39. S. Bakeriana, Bail. 
The ventral leaves are cordate, bluntly pointed and oblong. A few 
stomata occur on the margins, but none on the ligular face. Four 
to five rows of stomata occur on the aligular face. The margin is 
not sclerotic and very faintly spiny, or quite smooth. 
Dorsal leaf. Ovate, pointed, with a faintly spiny margin. Stomata 
occur on the aligular face only. 
Section. Like that of £. concinna } but the mesophyll is smaller in 
amount. A loose reticulum surrounds the bundle. 
In the remaining species the epidermis of both the ligular 
and the aligular surfaces, composed of quite or nearly similar 
wavy-margined cells, is much elongated in the long axis of the 
leaf. In one only, .S. Lyallii , there is a well-marked palisade- 
layer, usually double, as well as a reticulate mesophyll, which 
latter is alone, as a rule, present in the leaves of the re- 
maining species. In a few, a pseudo-palisade-layer suggests 
a transition between the majority and the type just discussed. 
C. Galeottii-type. 
40. S. Galeottii, Spr. (Fig. 8.) 
Ventral leaf Broad, ovate, oblique, bluntly pointed, with a faintly 
spiny margin and a few long multicellular spines on the edge of the 
